April 19, 2014

" User's Diaries"

Techno-logical paths


What if hackers, artists, activists and communicators join their paths to generate social change? (in spanish... activate captions in your language)

Hacker Neighbourhood

The Neighbourhood of "Villa Coronilla" in Cochabamba, Bolivia will be built based on:

"... enhances and promotes: collaboration, mutual understanding and synergy..."

"... inhabitants, activists, artists, developers, designers, pointing to a sense of citizenship that extends from our neighbourhood to the mainland..."

"... creating accessible and effective tools of free use and simple to apply that generate citizen participation and autonomy..."

"... a free radio, a common library of documents (photographs and films of the public domain), blogging citizen systems, mapping the skills (of citizens) in OpenStreetMap and a messaging system to enhance dialogue through technology..."

I will be publishing more info of progress...

by 51114u9 at April 19, 2014 09:30 AM

April 18, 2014

" User's Diaries"

I am new to this digital mapping tool...

I hope to learn it well enough to have all the safe bicycle routes loaded on my android device during my 7 day bicycle tour in Denmark in a few I on the right track here? Or are my expectations out of line to believe that I can get a 100 square mile area of map data onto my phone? I really have no idea what is reasonable...And once I have a some mapped area loaded on a device, will I then be able to see my real time location as I travel? Is this the right tool for that level of travel guidance? thanks.

by slomo7 at April 18, 2014 09:05 PM

What kind of user/challenge stats do MapRoulette users want?

Last night I was working on the statistics display system for MapRoulette and realized that I don't know what to display.

In the rewrite of MapRoulette, we knew that me trics would play a large role in the project, so we added in lots of statistic capturing capability, as well as piwik support for even more metrics.

We could track what challenge a user has worked on, where those challenge are, where specific tasks are, how difficult the challenges are, how a user classifies tasks, how long they spend on maproulette, even how long they spend (generally) on each task.

Similarly, we could collect a ton of metrics for challenges. How many users work on it, are there a few "super-users" or is it widely distributed? Are people saying the tasks are fixed, skipped or false positive, etc. We can even find out how long users spend in aggregate on the challenge, or even drill down to the tasks and find out when people walk away from them.

But amongst all the possibilities- what do MapRoulette users really want to see? What intouerests them? Stats about themselves? Stats about other users? Stats about challenges?

Tell me what kind of stats (if any) you'd like to see in MapRoulette?

by emacsen at April 18, 2014 10:38 AM

This is a test!!

Hello, this is the first time that i use OpenStreetMap.

by chayaphorn at April 18, 2014 10:09 AM

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by adityakalyan at April 18, 2014 06:22 AM

April 17, 2014

" User's Diaries"

Look who's using openstreetmap

Today I went to a pubic consultation on the proposed A14 road upgrade (it's a section of road in Cambridgeshire UK) . The consultation was hosted by the Highways Agency ( they look after and manage roads and traffic in the UK) and showed the route and detailed junctions on Ordinance Survey Maps, But I was pleased to see they had a PC set up which showed some of the route layered onto good old openstreetmap as "people can see whats what with our clear and named streets". I said I was the mapper of this and that on our map and they asked a few questions about OSM and they seemed impressed with OSM. I left thrilled that a big national organisation takes our stuff seriously.

by andy mackey at April 17, 2014 11:28 PM

Moskowskoje Morje

Is this a bug in the renderer or in the data: Look at Moscow in the humantarian renderer a.k.a. layer

by IOOI at April 17, 2014 09:13 PM

Meine erste Versuche mit TileMill

Ich habe heute meine ersten Versuche mit TileMill meine ersten Versuche gestartet, bin absolut begeistert und möchte euch davon berichten.


Einfacher kanns nicht mehr gehen. Einfach runterladen und schon kanns losgehen (zumindest unter Mac). Auch die Installation/das Einrichten von OSM-Daten geht dank der super Anleitung in Minuten und leicht von der Hand. Das eine soche Installation so ohne Probleme abläuft habe ich selten erlebt.


Nachdem ich kurz mit OSMBright rumgespielt hatte, wollte ich den "offiziellen" Standart-Stil mir mal anschauen. Alles hat super funktioniert, selbst der Import und das Stylen von Daten aus Overpass-Turbo ging ohne Bemängelung von sich. Jedoch musste ich feststellen das bei mir nur die ersten 6 Stildateien (.mss) von 20 angezeigt werden. Leider habe ich keinen Weg gefunden mir die anderen Dateien anzeigen lassen. Hier wäre ich also für einen Hinweis sehr dankbar!

"eigene" Daten

Als nächstes wollte ich meine erste eigene Karte erstellen. Dazu haben ich den erst besten OpenData-Datensatz (über Einwohner mit Migrationshintergrund) von Berlin runtergeladen. Ein erstes Problem stellte sich bei der Vereinigung der Daten mit Shapefile der Planungsgrenzen Berlins in QGIS. Trotz .csvt-Datei wurden bei mir alle Zahlen als String interpretiert und ließen sich auch nicht ändern (mit z.B. toreal). Letzendlich habe ich dann die Daten direkt mit LibreOffice in die zum Shapefile gehörigen .dbf-Datei geschrieben. Das hat dann das Problem gelöst.

Das Stylen der Daten ging dann schnell von der Hand (<30 min), alles ist super dokumentiert und geht wenn man jemals von CSS und HTML gehört hat sehr einfach. Nach einem kurzen Kampf mit Google Charts und der "Rechtschreibkorrektur" von Mac die mir immer wieder HTML Anführungszeichen verschlimmbessert hat, war dann das "Endprodukt" fertig.


Selbst als Anfänger (im Sinne der Kartenerstellung) geht TileMill super leicht von der Hand. Dies liegt vorallem daran das CartoCSS viel mit CSS gemein hat und alles andere in HTML geschrieben wird. Ein große Erleichterung ist auf jedenfall auch die umfangreiche und auch viele weiterführende Themen abdeckende Dokumentation, aus der ich viele Beispiele nahezu direkt übernehmen konnte.

Wer sich an der Kartenerstellung mal versuchen möchte oder seine (im weitesten Sinne mit Geodaten zu tun habende) Daten irgendwie visualisieren will, dem sei ans Herz gelegt TileMill einfach mal auszuprobieren.

TileMill 2, das Vector-Tiles unterstützt und gerade extrem aktiv entwickelt, ist auf jeden Fall auch eine Erwähnung wert und ich werde das demnächst sicher ausprobieren.

Da dies mein erster Blogpost ist und meine erste selbst erstellte Karte, seid bitte nicht so streng mit mir. Aber schreibt mir vorallem, was ihr davon haltet und was man ggf. noch besser machen kann!

by hno2 at April 17, 2014 08:10 PM

Rendering times

I mostly finished analysing how much it costs to me to keep the data up to date and rendering the maps. I will have to change the map design a little, but at the end the project seems useful. all the details in the following links:

You can see the rendered map here:

by Marcos Dione at April 17, 2014 06:25 PM

Spring Hike in Nackareservat - Sunday 20-04-14

This is our first hike of 2014, also the very first time that I use OpenStreetMap. What I am planning to do is to design ~20km route for the hike and then overlay our actual route on top of it. Hopefully, it's all possible with this map...

by SagharAsadi at April 17, 2014 05:28 PM

Moabi at State of the Map US

Update: we had an excellent time at SotM-US and the Sprint day. The presentation slides and video are now posted.

The Moabi development team is excited for State of the Map US this weekend. We are sharing a preview of the new Moabi (to be fully launched on Earth Day), and presenting our work on Sunday at 4pm, OpenStreetMap as Infrastructure, sharing the stage with the USGS National Map Corps project, and NPS Park Tiles. Hope to see you there! And if you want a demo any time this weekend, find one of the team, Sajjad, James, Leo, Chippy (virtually) and myself.

First why Moabi?

Moabi-DRC is an independent mapping initiative that collaboratively monitors land use in the Democratic Republic of the Congo. Our community works towards a more Transparent, Equitable, and Sustainable future for the environment and people of DRC. You can use Moabi DRC to explore, share, and create projects on a wide range of issues from REDD+ to community mapping and more.

Why OSM as Infrastructure?

OpenStreetMap's render stack, editor and web application can be used to power collaborative mapping efforts beyond OpenStreetMap. OpenStreetMap's software is unique and powerful as infrastructure for building communities of contributors. What happens when OpenStreetMap software is reused for new data sets and communities beyond

We've been working on customizations like...

Preset Editor for iD

Tile management through GitHub and a OSM TileAPI

Map Story Building in OSM

Showcase Map Sites in Jekyll/GitPages

So much more this weekend, see you!

by mikelmaron at April 17, 2014 01:00 PM

Северные границы Крыма

Наложил кадастровую карту России на карту ОСМ и обнаружил несовпадения северных границ. Вот ссылка на картинку: Надо ли их приводить в соответствие с кадастровой картой России? Сама же кадастровая карта тут:

by Calibrator at April 17, 2014 08:14 AM

Ayuda con el río Ucayali

Veo últimamente que la cartografía del río Ucayali es poco presisa. La rivera es pequeña, aunque se necesita aclarar sobre el trayecto y las rutas que traslada los aserradores y bosques.

Por favor revise la cartografía del río con las imagenes ofrecidas del sitio

Agradezco a los que revisen este caso.

by Diego Sanguinetti at April 17, 2014 05:16 AM

Elevation carving using OSM waterway data

The OSM dataset is a rich database of information about the world. Not only can the data be used to render beautiful and useful maps, it can also be used to do some nifty calculations in conjunction with other open datasets that exist. One such potential use is in cleaning up and improving elevation datasets such as the public domain SRTM or ASTER datasets. Both of these datasets offer elevation coverage over much of the world but they are limited in resolution (SRTM is 90 m per pixel, ASTER is 30 m per pixel).

Although these elevation datasets can be useful for very basic things like drawing 25 m contour lines on topographic maps, if you try to use these elevation models for more sophisticated things like drainage calculations, you will get very weird results due to a number of issues. First, almost no rivers are 30 m wide or more, so the river channel can't be modeled at all. Second, noise in the elevation datasets often results in river valleys with "bumps" in the river that make it back up and flood large areas that in the real world would really flood because there is a stream draining the water out of the valley. Lastly, in many areas streams, drainage ditches, and other such things often run in close proximity to buildings and other such features. In these areas trying to fix the elevation to correctly predict drainage ends up changing the elevation of buildings as the pixels are so large the whole neighboorhood must be raised or lowered to make the drainage calculations work. The example shown below shows a couple of these issues, and other areas suffer from them in much more signifigant ways.

The original ASTER data at 30 m per pixel.

The original ASTER data at 30 m per pixel.

In order to fix the problems outlined above, and allow for other useful operations it is therefore worthwhile to upsample the horizontal resolution of these elevation datasets. The GRASS GIS system has tools like r.resamp and r.proj which can do things like cubic interpolation which provide nice smooth datasets at higher resolutions (in my example I am using 3 m per pixel, a 10 fold step up from the ASTER data I started with).

The data resampled to 3 m per pixel using r.proj with cubic interpolation.

The data resampled to 3 m per pixel using r.proj with cubic interpolation.

This resampled data looks much more visually pleasing and if things like contour lines were computed from it they would be smoother, etc, but it still does not necessarily accurately reflect the drainage network topology for flood simulations. This is where the the OSM database comes in.

Because we map streams in OSM and because they are often traced from aerial imagery with resolution on the order of .1 meters per pixel, even very small streams and canals can be recorded with their exact position and shape accurately recorded. Furthermore, we can measure things like the width or depth of the waterway to further improve our data about the feature. This high precision stream path can then be "carved" into the higher resolution elevation model to allow the stream to cut through the small "bumps" intorduced by the cubic resampling. In the example below a 5 pixel wide (i.e. 15 meters wide) channel is cut into the dem everywhere there is a river or stream in OSM. The stream is first "leveled" by iterating over all the pixels in the stream and for each one setting it to the minimum of its own value or the 8 pixels surrounding it (the 3x3 neighborhood). During this leveling step if the pixel is on the stream centerline is is carved down 5 meters below the minimum neigborhood value, if it is along the edge of the stream it is only carved 2 meters below the minimum. Finally, after the carving is done the whole map is run over with a 5x5 neighborhood average to smooth out the river channel into something roughly U shaped to approximate a channel carved out by water, but still ensuring that the center of the channel will be free from major bumps that impede the flow of water in the flooding calculations. The result can be seen below, notice that not only can we now see the irrigation lines in the fields in the center of the image, we can also begin to see the rough cut in erosion pattern in the mountainous regions as well.

The final 3 m elevation model with the stream network from OSM carved into the surface.

The final 3 m elevation model with the stream network from OSM carved into the surface.

The final result is quite nice, both visually and topographically. This is just a first step in this process to demonstrate the basic idea. I plan to do much more in terms of varying the width and depth profiles of the waterways to more accurately model the drainage system and I also want to look at integrating other sources of elevation data from the OSM database such as natural=water which shows a level contour line in the elevation profile at high resultion, natural=cliff and barrier=retaining_wall which indicate "jumps" in the elvelvation model, and also things like road and railway embankments, etc. The 3 m per pixel chosen is just small enough to nicely represent the width of a built up road or rail line or to represent roads "sunk" down a few inches from the surrounding grade due to things like curbs, etc. I hope to hear suggestions on other things from OSM I could use, or how the OSM data itself could be improved to better allow for these kinds of analyses.

EDIT: As requested in the comments below, here is the 'difference' calculated with r.mapcalc between the upsampled DEM and the carved DEM. The values in the "flats" i.e. anywhere that is not a river range from about -1 to 1 m and the river are as deep as 7 meters in the places where they cut through a "bump" caused by the cubic resampling process.

The "difference" between the 3 m DEM and the carved DEM.



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April 16, 2014

Hanno Böck - Bleichenbacher-Angriff: TLS-Probleme in Java

In der TLS-Bibliothek von Java wurde ein Problem gefunden, welches unter Umständen das Entschlüsseln von Verbindungen erlaubt. Es handelt sich dabei um die Wiederbelebung eines Angriffs, der bereits seit 1998 bekannt ist.

April 16, 2014 10:00 PM - IMHO - Heartbleed und die Folgen: TLS entrümpeln

Die Spezifikation der TLS-Verschlüsselung ist ein Gemischtwarenladen aus exotischen Algorithmen und nie benötigten Erweiterungen. Es ist Zeit für eine große Entrümpelungsaktion.

April 16, 2014 10:00 PM

" User's Diaries"

Sobre Pucallpa

Tratando de actualizar todos los mapas de Pucallpa, ya era hora. Las direcciones confusas, escasas localidades y tiene poca pinta de refinada. Pucallpa quisiera tener una calidad turística superior como de Paris y así debe ser.

by Diego Sanguinetti at April 16, 2014 08:29 PM

Chris Hill

Images to map overlays

I have been working on a project that needs maps to make sense of it, more of that in a later post. It is a history project for my village so I wanted to overlay maps from the 19th century and early 20th century with the modern map. The modern map is easy, I know a good contemporary map I can use. For the historical map layers I need maps laid out as tiles so I can use Leaflet to display them.

I was given a scanned map of the village dated 1824 and found another set of maps dated 1910. All of these are out of copyright, so I can comfortably use them. Scans of the 1910 maps and a lot of fiddling and joining gives me a .jpg file for the village. Now the two scans need aligning to be the same projection as the OSM map.

I chose to use Mapwarper to rectify the scans to match OSM. The process is straightforward. I uploaded the .jpg file and the site overlays it on the OSM map. You can add control points on the uploaded image and matching ones on the OSM map. The more control points you add, the better the final alignment. I used road junctions mostly as the control points, though the 1824, pre-enclosure map has far fewer roads and I had to make the most of what I could find. The image is then rectified and a GeoTIFF is available to download. A GeoTIFF is a bitmap with georeferencing information added. Once this has been downloaded it can be turned into tiles.

GDAL has a set of utilities to work with geo-data. One of these is which is a python program to turn a GeoTIFF into a set of tiles. It creates TMS tiles, TMS stands for Tile Map Service which I think was intended to be a standard. The numbering of the Y-axis tiles is inverted compared to OSM tiles. It is easy to rename the tiles to match the OSM convention, but Leaflet (and OpenLayers) supports TMS and none-TMS layers and can use them interchangeably. 

Running gdal2tiles (e.g. -z13-19 xxxx.tif tiledir) gives set of tiles from the GeoTIFF (xxxx.tif) for the zoom levels specified (13-19) and stores them in the directory specified (tiledir). These are now ready for use with leaflet.

I want to overlay the older maps on the modern map. All of these layers are opaque, so if the three layers are just stacked then only the last one will display as it will hide the other two. Leaflet lets you specify the opacity of a layer, so by altering that the details of each layer can be visible simultaneously.  These can then be used as the base to show an extra layer of detail, but more that another time.

I have created a simple page to show these layers. There are sliders to control the opacity. I spent a bit of time aligning the 1910 map and I'm fairly happy with the result. The 1824 map was a bit crude so I used fewer control points and the result is not as good. It is still interesting. I'm looking for any more maps of this era for my village.

by (Chris Hill) at April 16, 2014 07:04 PM

" User's Diaries"

April 15, 2014

" User's Diaries"

home neighborhood

Just learning how to use this program, having some difficulties. Wish me luck please!

by ehermes at April 15, 2014 08:19 PM

OSMBlog (German)

Wochennotiz Nr. 195



gezeichnete OSM-Karte [1]

Talk, Forum, Wiki & Blog

Open Data & ODbL

Humanitarian OpenStreetMap Team




  • User msdess weist auf den neuen “Fahrrad-Computer” von Garmin, den Edge 1000 hin. Interessant die Aussage: “Die vorinstallierte Garmin-Fahrradkarte enthält OSM-Daten (OpenStreetMap) mit routingfähigen Straßen, Radwegen, Höhendaten, Points of Interests und einer Adresssuche.”
  • Wegheld, eine Plattform zum Anprangern von Falschparkern, nutzt OSM. (via Forum)
  • User Jotpe teilt mit, dass die Stadt Köln auch OSM nutzt.


  • JOSM war der Profi-Editor, echte Profis benutzen Level0 von Zverik als Editor. Er braucht kein Javascript, denn man editiert in der Level0L-Syntax, die an das OSM-XML angelehnt ist. Er ist wie Potlatch 2 und iD unter der WTFPL lizenziert.
  • Slide ist ein Addon für iD (Taste D), das grob gezeichnete Ways an ein Bündel von GPX-Tracks anpasst, die auf OpenStreetMap hochgeladen worden sind. Dazu gab es auf der SotM-US auch einen Vortrag.
  • BBBike Extract nutzt jetzt auch SRTM Daten in PBF, Garmin, und OsmAnd Exporte.

und sonst …


Termine vom 16.4.2014 bis 23.4.2014

Ort Name Datum
Lüchow Stammtisch 17.4.2014
Augsburg Stammtisch 17.4.2014

Wer seinen Termin hier in der Liste sehen möchte, trage ihn in den Kalender ein. Nur Termine, die dort stehen, werden in der Wochennotiz übernommen.

flattr this!

by Wochennotizteam at April 15, 2014 11:36 AM

" User's Diaries"

Работа с картой

Весьма полезно, но есть ещё некоторые недоделки в области редактирования. Особенно, в малонаселенных местах

by Анна Александровна at April 15, 2014 11:35 AM

Peter Batty

Report on another great State of the Map conference

Summary I spent the past weekend in Washington DC for State of the Map (SotM) US, the OpenStreetMap conference. It ended up selling out, with around 500 attendees, making it the largest OpenStreetMap event yet. As with previous SotM events I’ve attended (the last one being in Denver in 2011), I found it very enjoyable and interesting, and there was great energy about it as always, much more than

by (Peter Batty) at April 15, 2014 04:30 AM

" User's Diaries"

Férias + OSM

Em maio tenho alguns dias de férias e vou viajar por quatro estados do Brasil. Adoraria encontrar mapeadores por onde vou passar e organizar palestras em faculdades, mapping parties ou mesmo um bate-papo informal em algum bar, café ou restaurante.

Em Porto Alegre vou apresentar uma palestra sobre o OpenStreetMap no 15º Fórum Internacional de Software livre. Criei uma página no wiki para organizarmos outras atividades.

Vou passar também por Florianópolis, São Paulo e Rio de Janeiro. Se você mora em alguma dessas cidades e tem interesse em organizar alguma atividade ou bater um papo, deixe um comentário ou me envie uma mensagem!

by wille at April 15, 2014 01:23 AM

April 14, 2014

Bone Killian

CoffeeWhiskeyBeerCheezeburger Ride

Sloth and I were both looking for a ride of about 25 miles this Saturday, but neither of us wanted to drive somewhere to ride bikes. So, the plan was hatched that I would ride solo to the coffee shop, and Sloth would meet me there, then we would ride to my house, and Sloth would ride solo back to his place. Everybody gets 25 miles, nobody had to drive.

So, I rode down to the coffee shop. I drank some coffee. When Sloth showed up, he had forgotten his GPS or something, so we had to ride back to his place.

Once we got there, he had some sort of French whisky for me to try. Under normal circumstances, I don’t drink intoxicating liquors before noon, but this was just a taste[1], and it would have been poor manners to decline so generous an offer. So, I had a taste, and it was a very nice whisky indeed.

Now that we were fully caffeinated and had a wee nip[2], it was time to go ride bikes. We made it almost 11 whole miles before we decided it was time for lunch. So, we stopped off and had some beers and some cheeseburgers.

Beers.  Cycling caps carefully posed for the picture

Beers. Cycling caps carefully posed for the picture

This worked out pretty well for me, because the restaurant was only a mile from my house. Sloth had to ride back over the mountain with a gut full of bacon cheeseburger.

People will tell you that riding bicycles is a good way to loose weight and be healthy. I do not see how this can be true.

[1] It may have been more than just a taste.
[2] A double

by Adam at April 14, 2014 08:31 PM

OpenStreetMap Spain

Mapping Party en la Sierra de Cazorla 2014 – Agradecimientos

Animación del progreso de edición en el Cazorla OSM MappingParty 2014La Mapping Party de la Sierra de Cazorla ha sido un éxito de participación, organización y de recopilación de datos. Tal es así que aún necesitaremos unas semanas más para introducir todo lo mapeado.






Progreso en Cazorla

Quería agradecer:
. A los patrocinadores: Instituto de Estadística y Cartografía de Andalucía – Junta de Andalucía.
. A los organizadores: Diputación de Jaén y Municipios.
. A los municipios implicados: La Iruela, Cazorla, Peal de Becerro y Quesada, por su invitación a todos los participantes a comer, dormir y hacer turismo. Sois anfitriones excelentes. Habrá que volver con más tiempo a recorrer vuestras calles, caminos y parajes y conocerlos más a fondo. Aunque parezca mentira, no lo hemos visto todo.
. A los técnicos y altos cargos municipales que se remangaron y mapearon como cualquier voluntario demostrando su verdadero interés por conocer de primera mano qué es OSM y para qué sirve.
. A las sedes y técnicos de Guadalinfo de las cuatro localidades que fueron puntos de reunión, aprendizaje y edición totalmente imprescindibles. Muchas personas subiendo datos a OSM a la vez, no es fácil de gestionar y fue resuelto impecablemente.
. Y especialmente a los organizadores hardcore de la Diputación de Jaén, algunos de ellos vecinos y técnicos todos ellos expertos en mapas y en organizar estos mega-mapping-parties como el de Baeza y ahora éste, que son los han trabajado duro con semanas de antelación en la planificación, zonificación, grupos, preparación de monitores de JOSM, estadísticas, intendencia, logística. Habéis repetido buen hacer y el mérito es realmente vuestro.
. Del grupo anterior mención a los que además fueron coordinadores de cada municipio Cristina Sanjuan, Jornatan García, Agustín de la Fuente, Raquel Aranda y, como no, Juan Ramón Tamayo de OSM e Ingeniero Técnico Topógrafo.

. Finalmente, el agradecimiento más importante y sentido a Julio Torres Manjón, Responsable del SIG de la Diputación de Jaén por su increíble energía, empuje, visión, meticulosidad, capacidad de convicción y fe; que además, es capaz de contagiar todo ello a los equipos que forma. Él es el verdadero artífice de que todo esto haya sido posible.


Participantes en Cazorla

Por otro lado, la pieza fundamental de OSM, los voluntarios:
. Profesores de la Universidad de Jaén y sus alumnos (aunque puede que haya habido que pescar a alguno con algún crédito),
. Los vecinos participantes de los cuatro pueblos. El grupo de la Escuela de Oficios de Quesada en bloque. Genial!.
. Los que han venido por cuenta propia, tanto nuevos como los OSMeros de la lista de correo en español,
. Y de todos los anteriores, mención especial a los que se han dejado liar para ser monitores de grupo y profesores para los voluntarios con menos experiencia.

Con que a alguno le haya entrado el gusanillo y se anime colaborar con OSM metiendo su pueblo, barrio, lugar de vacaciones… vale el esfuerzo.
Espero haber tenido algún éxito en explicar la diferencia entre publicar y liberar datos.
No es lo mismo!.
Muchas administraciones empiezan a publicar sus datos, pero para poder ser usados y ponerlos en valor de verdad, hay que liberarlos.

Y ahora datos

Han participado más de 130 personas de 3 países, 14 provincias y 42 poblaciones.
Hemos mapeado 17 núcleos de población de los 4 municipios y hemos recorrido 132 km de calles.



Mapeando El Burunchel


Mapeando Quesada

2014-04-05 14.02.12_send

Comiendo en Peal de Becerro


Castillo de la Iruela

by Sergio Sevillano at April 14, 2014 05:17 PM


10 years of footpath mapping for OpenStreetMap

On a Saturday in late March I joined Nick Whitlegg, one of the earliest OpenStreetMap contributors, for a session mapping footpaths in the Weald. I was introduced to Nick several years ago on the basis that we were both walkers. But this was the first time we'd actually done a walk together, and my first opportunity to see how a real expert on footpath mapping did things.

Nickw with lots of footpath detail needing mapping
near Ockley, Surrey

Nick is a classic example of someone who had already started trying to combine technology, maps and leisure interests before they came to OpenStreetMap. It has often struck me talking to OSM contributors who loosely fall into the same demographic as me is the degree to which many of them were already actively doing this kind of thing, but hadn't found the right technology mix until they found OSM.

I certainly did: my first attempts at using maps for visualisations were done with MacDraw, later on I used CorelDraw (partly because it came with some good map files), and then Visio. I was still playing with Visio as late as 2003. When I got involved with volunteering at nature reserves my interest in mapping things was re-awakened and I made some use of a GIS product called MapMaker Gratis (not to be confused with Google MapMaker), and even played around with trying to warp old maps with this software. So although I was not an early adopter of OSM, only starting in late 2008, I knew all the things which had frustrated my earlier attempts. This meant that once I started using it, I very quickly could see that it had addressed most of these problems quite effectively.

Off the top of my head I can think of a number of British OSM contributors (Richard Fairhurst, Mike Collinson, SomeoneElse and Nick Whitlegg) who all had been collecting map data and creating or trying to create map applications before getting active in OSM, A good example is Richard's New Adelstrop Railway Atlas (I have a sneaky feeling that involvement in OSM was one of the reasons this was not completed). I'm sure each of their specific needs were different, some wanter maps for personal use others for business: but, like me, each recognised that what Steve Coast created provided a sound basis to build on.

Half way round our walk Nick remarked that he collected the first data for his Freemap project on 21st March 2004, 10 years and 1 day earlier. As soon as he was aware of OSM, Nick moved his data there and has been mapping footpaths in Europe and North America ever since. Thus we were also celebrating 10 years of data collection for OSM slightly before the official birthday in August.

Footpaths in the Weald and West Sussex

Our starting point was Ockley station (one my late 1970s maps I had with me that day called it Ockley and Capel Station). We'd chosen this on the basis of gaps in the coverage of public rights of way in Surrey and Sussex. Nick already knew there were significant gaps S of Cranleigh: at least in part because the area is not particularly accessible by public transport.

Years ago I did a fair bit of walking in the area: when I was first in London as a postgraduate student I was fairly desperate to get out of the city and tended to head South by train. I can recall three biggish walks in this area in the past: a tedious slog along an old railway line on a hot day (the Downs Link), and two rather pleasanter walks which led to pubs in Ewhurst and Rudgwick for lunch. So although I can no longer remember the precise details of the routes, refreshing my memory of the area is likely to prompt more recall.

As a complete aside, one of the odder places I've walked in South-East England is around Thorney Island, which is a military base. Access to the footpath is a little unusual, as shown below.

Amazingly this is a public right of way!
Thorney Island
Like most parts of Southern England, this area has plenty of rights of way: so common that it's often feasible to create a perfectly good circular walk which avoids roads even without a detailed map.n Paths are also regularly used, unlike in Carmarthenshire.

In general our search for paths used the council shapefiles from rowmaps. Both Nick and I had created overlays showing routes which appear to be missing on OSM. Nick's was more useful because it was on his smartphone as part of his Opentrail app (definitely a believer in eating his own dog food). Even if we walked a path we also had to see at least one guidepost or waymarker indicating the status of the path. In this part of the country it is very easy to follow another path and think one is still on a PRoW (Public Right of Way) (right at the end of the day we came across a path which seems to have been marked as a PRoW in error).

A couple of days before going out I'd prepared a first draft of my map of missing Surrey footpaths and discovered (as I knew I would at some stage) that an OSM mapper in the area has red-green colour-blindness. I had to fairly quickly experiment with changing my base visualisation with a little help from Coblis, more about this another time).

Missing footpaths in the Capel/Ockley area (highlighted in Blue)
Sources: OSM contributors, Ordnance Survey Open Data Meridian Crown copyright and database right OSGB, Surrey PRoW (Surrey County Council via rowmaps)


Although the station is now called Ockley it is much closer to Capel. I had about 45 minutes before Nick was due to arrive, so I pottered around in the Capel direction because I knew our target was Ockley. I was able to add a little detail around the station, and note a closed footpath just beyond the railway bridge. I then walked down to the main road and found the start of a footpath on the other side. Although I found a stile with an arrow painted on it suggesting the route for the next bit of the path, it did not look very promising, particularly as there was an electric fence inside the wooden fence.

Does the footpath really go this way?
Capel, Surrey

When Nick arrived we couldn't use the original path planned (it was closed because of a landslip on the railway embankment caused by recent wet weather), but very quickly found an adequate substitute about 400 metres further along. This took us along the edge of a field which didn't seem to be farmed and then into pleasant woodland. Many fields in the Weald are surrounded by fairly narrow wood belts, but many of these appeared to be original woodland (typically with carpets of bluebell leaves) rather than plantations. By British standards this is heavily wooded countryside.

Hazel Coppice beside the path

Another aspect of this countryside which we came across again and again through the day was that streams were deeply incised into the surrounding landscape (see main photo). These narrow valleys, which Nick believes are locally known as "Gullys" are nearly always wooded. Typically they were about 10 m below the prevailing land surface but sometimes more. In many ways they are reminiscent of places on the Mercia Mudstones above the Trent valley which are known as "dumbles". The geomorphology is probably quite different, as the Dumbles are a peri-glacial phenomenon associated with the lower sea levels of the time and the large water flows from melting glaciers , which caused deep cutting  into quite weak strata.

Beyond our first stream we came to a nexus of paths on the outskirts of Ockley. These took some interpreting (and I'm not sure we captured all of them) because of lost field boundaries. At one point we found an isolated stile still retaining footpath waymarkers. A direct line across a ploughed field took us out at the North end of Ockley next to the Village Hall.

Ockley is set either side of an old Roman Road (to Chichester) and has a long wide village green. I'd forgotten what an attractive setting it has. We didn't pause, but crossed the green to our next path. Later on checking my photos I discovered that one of the roads out of Ockley had been misnamed. Intrguingly the incorrect name (Lake Road) is present on both Ordnance Survey Open Data and Google Maps (despite the StreetView cameras having obviously photographed the name on the sign).


From Ockley our target was a small hamlet called Walliswood: notably because it had a pub which we seemed likely to reach at the right time for a lunch break. The Weald is full of small dispersed hamlets like this one: these days often with discrete big houses set back and the gardens almost enclosed by woods. An excellent network of paths led us to within 100m of the door of the Scarlett Arms, with a mix of fields, woods and a golf course.

Scarlett Arms by Mark Percy on Geograph
 © Copyright Mark Percy and licensed for reuse under this Creative Commons Licence.

We also came across a small patch of "Unimproved Grassland" managed by the Surrey Wildlife Trust: for once a real meadow.

Unimproved Grassland interpretation panel

The pub was pleasantly unpretentious, with a smouldering fire and decent beer. I've found in the past that after a pub lunch walking isn't as enjoyable as it could be, so I was happy to agree to Nick's suggestion of not eating in the pub. I had sandwiches anyway. When we did start again I felt fresher than if I'd eaten.

Getting Serious

After lunch we continued, first heading SW and then working northwards with a view to returning to the S end of Ockley and then back to the station by a completely different route. The countryside we passed through was again similar to that we had already seen, but the sun shone and we had good views of Leith Hill to the N.

Some time near 15:30 Nick really got into his stride, and we started doing circular loops to capture more footpaths. After the first of these I realised I was not going to keep up his pace, so we split with Nick taking the longer side of a loop whilst I walked the shorter one. One of mine took me back across the golf course, and required a fair bit of sleuthing to find the footpath guideposts and from there reconstruct the actual route of the path.

View of Leith Hill from near Forest Green

By the time we got to Ockley I was slowing down to the extent that I knew I had to properly pace myself to ensure we got back in adequate time for the last train at 18:36. A really steep descent into and climb out of the nature reserve at slowed me up more, but thereafter the return was largely along metalled roads and I once again found a decent sustainable pace.

I suspect that Nick didn't map quite as much as he would have done on his own, but nonetheless I think we achieved a decent bit of mapping, adding something like 20 km of paths which had not been mapped, and improving information on several others. In many ways mapping was subsidiary in that we had a long walk through attractive countryside on a nice spring day, which was reward enough in itself.

A repeat

In fact we both enjoyed it enough to repeat the exercise last Saturday (11th April) in West Sussex between Midhurst and Petworth. We adopted a similar format, but did more mapping before stopping for a break at a pub. To my fascination the pub had geological maps of the local area at the bar. An innovation which I very much enjoyed.

Footpath mapping around Midhurst, April 2014
Mapping footpaths for OpenStreetMap April 2014
Route is shown as a pale line over the Thunderforest Landscape layer
Potentially missing PRoWs are shown in blue (from West Sussex council via rowmaps)
 This time I had my proper camera with me, and took many many photos. Just a couple from the end of the day might give some feel for the places:

Lovely evening light, Tillington
Evening light on new leaves, Tillington

Above Tillington at Pitshill, I found that some pre-existing paths had been moved. These turn out to be the paths involved in a well-known legal battle between the landowner and the Ramblers Association, which the landowner won. I was able to get GPS traces for the upper-half of the new alignment and remove paths which now don't exist. So even in the countryside, it's important to continually verify OSM mapping. Also in this area many paths are poorly aligned and could do with double checking.
Evening vista of South Downs
Vineyard on the Greensand Ridge looking SW to the South Downs

This was countryside I'd never visited before, and it's a bit different from the other parts of the Weald. In the past when travelling this far I'd always gone to the next ridge of hills, the South Downs (now a National Park), and, unjustly, ignored the Greensand Ridge.

Needless to say we already have a provisional date for our next joint expedition.

by (SK53-osm) at April 14, 2014 04:40 PM

Bone Killian

" User's Diaries"

Bigger Data Collection of GPS Cordinates for Art

So i like geography so for art class I learned the GPS sensor.

when i went on a road trip for spring break during spring break, I left my gps on and stored the values into sqlite database from the phone.

I then created a dataset of latitude, longitude, and time into 540,127 rows that I wish to use to create a visualization.

Today I worked on this project and borrowed a fast computer at the school, converted the rows from terminal sqlite query to (.txt and .html) form.

I am learning to program with Android for the course and so I found myself at the Google for fusion tables. About one hour ago I was able to figure out how to embed 100,000 (is limit on free acount?) onto the Google Map interface.

However, I want to do more and I hope Someone can offer me some advise or ideas.

Thank you for taking the time to read my story,


by 佐川の少年-REN at April 14, 2014 06:40 AM

SOTMUS 2014 Day 2 Notes

Open Data for Resilience Initiative - Disaster Risk Management - John Crowley @jcrowley

  • Collective memory of deep history - recalling hazards of particular locations
  • OSM as collective memory
  • Geologic cycles can be quite long - thousands, millions or years
  • Underlying nature of risk is changing - cities growing at 5%. Data describe a very dynamic reality
  • Understanding dynamic risks requires better data
  • Need for better data - smaller grid squares - beyond 10km grid down to building polygons
  • Open Data for Resilience Initiative Field Guide
  • Govt data often exists, but need to be collated and made open
    • Fractured over many ministries
    • Political barriers
    • Proprietary formats
    • Worse: PDF scans of "data"
  • Collection on paper, then entering back to OSM using JOSM
    • Building survey form - standard form
    • Teaching community to build their own data, not outsiders
  • Quality assurance
    • Teach people to improve data collection while they're doing it
  • InaSafe - plugin for QGIS - visualize impact models
  • - OpenDRI Field Guide 1.0 CC-BY
  • Performing analysis and getting it to village-level govt requires a lot of printing
  • The map is a collective memory not only of what is or once was, but what might one day no longer be.
    • What could be, what could be built back stronger?

Building a Community - HOT in Indonesia - Kate Chapman

  • Mapping for preparedness
  • InaSafe - impact modeling software
  • People are core to the community
  • Train people -> those people train others
  • Recruiting posters - new interns had geography background
  • Technical literacy, technical problems (JOSM doesn't run, firewalls)
  • People excited, but don't know how to get started -> train the trainers
  • Train the trainers - little to do with mapping, more about how to teach, build adult engagement
  • 50% of Scouts are in Indonesia
  • learnOSM - step by step guides
  • World Bank GFDRR
  • Field Papers

Inside the Eye of a HOT Activation - Dale Kunce

MapGive - A coordinated campaign for action - Joshua S Campbell DOS

  • Humanitarian Information Unit - research and analysis of humanitarian emergencies
  • Maps are often taken for granted or assumed to exist, when more often they do not
  • @mapgive
  • Connective power of internet has fundamentally changed economics of information creation
  • Lower the bar for new mappers to join
  • Crowdsourcing in government: build relationships with volunteer and technical community, build trust in communities - share imagery - engage local communities - enhance the data
  • American Spaces - outreach centers around the world

OpenStreetMap as Infrastructure - Elizabeth McCartney, USGS; Mikel Maron, Crowd Cover

  • National Map Corps - Volunteered Geographic Information at USGS (project suspended 2008)
  • 2010 project revived
  • Volunteers from 4H, Scouts, retired people
  • Users are peer reviewers after editing 25 points
  • Moabi - collaborative mapping project, DR Congo, forest monitoring
  • Looking for open source mobile OSM editor

I Imported Chicago - Ian Dees @iandees

  • Move to new city, new job -> found open data portal in Chicago -> discussed with local OSM community
  • Still did it wrong - didn't talk to global OSM community
  • License was not compatible - require user to take down data on request
  • Convince open data people of Chicago to switch license to MIT
  • 3 months to import, 1.5 years start to finish calendar time
  • Easier for others to add data once building shapes imported (restaurants, businesses, etc.)
  • Import using JOSM easier than scripting in this case

Open Data and Cities - R.E. Sieber @re_sieber

  • What happens to participation when anyone can participate any place?
  • Need grad students
  • How can non-experts be empowered by technology
  • Empowerment of marginalized people and democracy
  • Open Data - data should be freely available for everyone to use, reuse and republish without restrictions
  • Licensing challenges of accessing municipal data
  • VGI - Volunteered Geographic Information is the widespread engagement of large numbers of participants involved in the digital creation of geographic information. Participants are usually non-experts and have little formal coordination with each other.
  • How well do City Open Data and OSM play together? Not well, but getting better.
  • Mapdust - bug tracker for OSM
  • Accuracy is not the first objective. Accuracy is dependent on its use.
    • Credentials provide the accuracy - citizens cannot check every point
    • Eyeballs provide the accuracy - OSM contributors refine the data
  • Neoliberalism - push in cities to deregulate and privatize
    • Govt has less money, VGI looks enticing
  • Andrew Keen's warning - relying on amateurs/volunteers is a problems, govts shed employees and replace with volunteers, if volunteers don't collect enough data, there are no employees to fill gap.

by benbhsu at April 14, 2014 02:36 AM

Adding to Crestline and Other San Bernardino Mountains Communities

After joining this community, making my first edit, and getting some nice welcome messages, I found that my password no longer worked for some reason. I got very busy at work and kept putting off coming back until today as I'm pretty much changing ALL of my passwords due to the Heartbleed bug.

Now that I'm back in, I've made several updates to Crestline, California and some of the surrounding communities. While most of these were entries for restaurants and other businesses, I did find one incorrect piece of mapping in the Valley of Enchantment where Log Lane was shown to stop short of meeting the town's main drag, Waters Drive (for any fans of "Star Trek: Enterprise," the "Carbon Creek" episode from the second season did some filming on Waters).

It looks like a lot of this area has not had a lot of contribution as far as businesses go so I am glad to get back in here and add a few things for everybody. It's a nice place to visit so I hope my additions will encourage people to come up here...and, bring money...our local businesses need it! ;-)

by KoHoSo at April 14, 2014 01:10 AM

April 13, 2014


Improvements in turn restrictions

The latest version of mkgmap now has much better support for restriction relations.

Here are the main things that are newly implemented:

  • Restrictions that prohibit going between two node via a particular way.
  • restrictions no_entry or no_exit
  • specific vehicle type, e.g. type=restriction:motorcar or restriction:motorcar=no_u_turn
  • fixes possible error if different roads connect the same nodes (old code possibly saved the restriction for the wrong road)
  • detects obsolete restrictions, e.g. when a oneway doesn't allow to enter the road or when the restiction applies to motor_vehicles only and the road is a cycleway.
  • if the style creates multiple routable ways for one OSM way, the restriction is added for all needed combinations

There are a lot of bug fixes too, so it should all work a lot more smoothly. Use version r3189 or higher for all the fixes.

April 13, 2014 11:00 PM

" User's Diaries"

Going on - expanding range

Unter Nutzung diverser technischer Hilfsmittel (Smartphone, App, Papier und Bleistift) geht das Kartieren munter weiter - Wege, Barrieren und Hydranten sind jetzt am Zug - parallel dazu auch Hausnummern von bereits hinterlegten Häusern

by flothi at April 13, 2014 10:15 PM

Hanno Böck - Revocation: Zurückziehen von Zertifikaten bringt wenig

Im Zuge von Heartbleed sollen Serverbetreiber ihre Zertifikate erneuern und die alten zurückziehen. Das Problem dabei: Das bringt fast nichts, denn kein einziger Browser prüft die Gültigkeit der Zertifikate auf sichere Weise.

April 13, 2014 10:00 PM

" User's Diaries"

I mapped 100 countries in 100 days

World Map

If you for chance read my previous diary entry, I registered on GiveIt100 and documented with a video a changeset made each day in a different country. I followed some basic criteria: each day in a different continent (counterclockwise order); if I missed a day I'd map in the same continent for two days; map in a country where I didn't map before.

So, straight from January 1st, I got to April 10th and in the last video I did a changeset in San Mateo, CA, where lives the developer of GiveIt100 (I previously mapped in USA, I know!).

The complete project is visible on

Having the NaturalEarth shapefile half filled, I should paint it green completely some time...

Someone with a planet file at hand could do a ladder of users ranked by how many countries has been visited (similar to the hydc user page)..

Thanks to Karen and Finbarr for their work!

by sabas88 at April 13, 2014 06:11 PM

mystic place

I cannot help but share two images of a place I stumbled over today while mapping a little. A decaying house with a half collapsed outhouse at its side - but some flowers were well attended:

well attended flowers at a decaying house

well attended flowers at a decaying house

by malenki at April 13, 2014 04:37 PM

Diversification with OSM

JOSM seems to get translated at transifex and launchpad, you can file bugs against JOSM at and github, you can file bug against a lot of OSM things at and github, too.

It doesn't matter when all resources are handled equally, but it is not so nice when you look at the wrong place

by malenki at April 13, 2014 04:23 PM

SOTMUS 2014 Day 1 Notes

(unedited except for formatting. hopefully these will mean something in the future)

Intro to OSM Morning Session

  • anything that stays the same is mapped
  • started by people walking around with GPS devices, now large TIGER data imports
  • local knowledge is most important - priority over tracing aerial imagery (Bing imagery)
  • discussion is over mailing lists -
  • - which tags are most popular
  • osm2pgsql -> postgis -> tilemill
  • - open source javascript library for mobile-friendly interactive maps
  • - map tutorials
  • - visualize osm changes

Implementing Change in OSM - @jfire

  • OSM community building
  • Loss aversion
  • Status quo bias
  • Building compassionate communities in tech - watch
  • Work in the open - build trust, get expertise
  • Work incrementally
  • Over communicate - clearly explain objectives and benefits - not the same as being verbose - simple explanations are better
  • Perfect is the enemy of much better than what we have now
  • Be patient

Engaging the OSM community: NYC Govt DOITT

  • Addressing in NYC
    • No central authority
  • Why not crowdsourcing
    • Problematic workflow
    • Limited staffing
    • Discrepancies between official record and reality
    • Another set of eyes, engaged community
    • Local Law 11 - put all city data in public domain by 2015
  • Open data to wider audience, improve data, engage community
  • Used by 311/911
  • Lessons learned
    • Involve local community
    • Accuracy should prevail
    • Metadata can always be improved
    • Data model confusing
    • Constructive feedback is great
    • NYC addressing is a challenge

Meeting in Person - Kathleen Danielson

  • Getting people into the same room to drink beer and do nerdy things
  • Why does meeting in person matter? Diverse interests, mapping is solitary, help the project
  • Community health
    • Mailing lists can be unhealthy/unconstructive discourse
    • Building real world connections can help
    • Bottom-up approach to global community building
  • Find mappers, find something to do, find a way to keep it going
  • ito OSM mapper
  • Pascal OSM Contributor's map
  • Meet your community where they are (IRC is not for non-tech people, use Meetup, Facebook, etc.)
  • Reassess - what your community needed before may not be what they need now
  • Social meetups - "Mappy Hour", Maptime, Editathons
  • Connect with other groups - environmental, tech
  • Do not try this alone - burn out
  • Avoid burnout - co-organizer, ask for help, what kind of schedule can you support?, make sure it's fun, take a break if needed

OSM in the Classroom - Richard Hinton, Nuala Cowan

  • DOS Humanitarian Information Unit
  • Why is OSM in the classroom different?
    • Equitable work volume for each student
    • Track/grade
    • Prevent overlap (Tasking Manager)
    • How to grade?
  • Instructor prep
    • identify area of interest
    • generate workable grid
    • decide workload for students
    • develop a rubric
    • track activity using Overpass Turbo
    • Mapathons
    • Show me the way visualizing

by benbhsu at April 13, 2014 03:16 AM

Utilizando o Keypad Mapper 3

Usei hoje pela segunda vez o aplicativo para Android do Keypad Mapper 3, e obtive resultados interessantes.

A maior vantagem do Keypad Mapper (comparando com outros aplicativos android) é sua eficiência no mapeamento de números de casas. O usuário vai digitando os números de casa (e possivelmente o nome do local) e indicando em qual lado (dele) está a casa. Quando o usuário encerra a coleta de dados, eles podem ser exportados pelo usuário como imagens georreferenciadas (fotos), trilhas GPS e um arquivo XML do OSM.

Este último arquivo possui vários pontos com posições aproximadas de onde as casas deveriam estar. É recomendável que o próximo passo do usuário seja editar este arquivo puxando os pontos de números de casas para o meio de cada casa, e adicionar a chave addr:street coms o valor apropriado para estes números; para então fazer upload para o OSM.

A coleta de dados de hoje demorou em torno de 40 minutos, mas a edição no JOSM demorou quase 2 horas. A demora no JOSM foi devido a uma certa preocupação com o detalhamento de informações das lojas (através de fotos e do sítio web de cada loja, quando encontrado) e uma certa dificuldade para descobrir boas classificações para algumas lojas.

Antes e depois do mapeamento: animação mostrando antes e depois do mapeamento E sim, depois eu corrigi o "Auto Post Madelena" para "Auto Posto Madalena".

Aconteceu uma coisa engraçada quando eu estava fazendo essas alterações: Teve um lugar que tinha uma placa meio apagada, e não dava pra ver certinho o nome do lugar, mas dava pra ver o número de telefone. O nome do lugar parecia ser "Julia Uniformes Profissionais", mas para garantir eu pesquisei o número de telefone no Bing. Para minha surpresa, ao invés de "Julia", era "Juira"! Eu nunca adivinharia isso :-P

by jgpacker at April 13, 2014 01:16 AM

April 12, 2014

" User's Diaries"

Targeting inappropriate &#39;layer&#39; entries.

I'm presently targeting things that have inappropriate 'layer' entries in my area.e.g.

highway, layer -5 ... no tunnel/covered etc ...

park layer -2

I assume this way done for rendering issues. The areas look to be best served with multipolygons.

There do not appear to be tools to find these inappropriate layers, so I'm using a simple text editor to find them., then JOSM to do the editing.

by Warin61 at April 12, 2014 09:47 PM

Dingle Iloilo editing

Edited residential and houses in Dingle Iloilo, Philippines.

Problems with image resolution. Maybe some landuses are wrong, ask for criteria.

by vir_mugi at April 12, 2014 06:46 PM

The State of the Map US Song

If you're going to #sotmus Be sure to wear some GPS Devices in your hand If you're going to #sotmus You're gonna meet some gentle HOT people there

For those who come to #sotmus Any Zulu time will be a lat-long-love-in there In the bbox of #sotmus Gentle HOT people with GPS Devices in their hands

All across the Mercator projection such a strange vibration Neo-cartographers in tagging motion There's a whole new neo-cartographers generation with a new mission Neo-cartographers in tagging motion Neo-cartographers in tagging motion

For those who come to #sotmus Be sure to wear some GPS Devices in your hand If you come to #sotmus Any Zulu time will be a lat-long-love-in there

If you come to #sotmus Any Zulu time will be a lat-long-love-in there

Scott McKenzie in 2014 version - Have great a great #sotmus everybody

by AE35 at April 12, 2014 02:01 PM