What is IGN?
IGN stands for Instituto Geográfico Nacional (National Institute of Geography), a public institution in Spain. Its functions include maintaining spatial data and to producing topographical maps of the country.
What maps does the IGN offer (that are interesting for outdoor activities)?
- topo maps in 1:1,000,000, 1:200,000 y 1:50,000 and 1:25,000 scales
- satellite imagery from Landsat 7 and SPOT 5 satellites
- PNOA aerial imagery (PNOA – Plan Nacional de Ortofotografía Aérea, National Plan of Aerial Orthophotography)
How can I get the maps?
- buy a paper version. For 1:50,000 scale, there are more that 1,000 sheets, so it can result pretty costly
- download them from Centro de Descargas. They are free of charge for non-commercial use. You can select a format (GIF, JPG, TIFF…). Historical maps are available too
- connect to a Web Map Service server and display a georeferenced image using e.g. CompeGPS. According to my experience, quite slow. No 50k maps, no shaded reliefs
- visualize them using a web viewer
Why another viewer?
What is IGN-Google Maps integration library?
There are some TODOs in the project (they are described in README.md). On the next days I’ll try to fix them, depending on my spare time.
Where can I get the library?
I just published the very first version on the Github: https://github.com/mgryszko/ign-gmaps. The API is not stable yet and may change in the future.
How is it licenced?
MIT licence. You are free “to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software” = fork it and hack on it.
What are next steps?
I’d like to use it in Abredatos 2011 contest. Abredatos is a 48-hour programming challenge. You are supposed to developed a working application making use of at least one Spanish public datasource. It will be held on May 7th-8th 2011.
My idea is to develop the previously mentioned track & route manager with IGN maps and Garmin integration. If you want to participate, drop me an email/tweet.