Update README.md

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Eduardo Lacerda 2016-05-22 16:57:53 -03:00
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- [Mobile Development] (#mobile-development)
- [Visualization] (#visualization)
- [Tools] (#tools)
- [Data Sources] (#data-sources)
- [Resources] (#resources)
- [References] (#references)
- - -
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* [PostGIS 2] (https://gist.github.com/kidpixo/5698476)
* [PostGIS Raster] (http://www.postgis.us/downloads/postgis20_raster_cheatsheet.pdf)
## Data Sources
* [TZ Timezone Shapefiles] (http://efele.net/maps/tz/world/) Polygon boundaries of world timezones.
## Resourses
* [Cartographical Map Projections] (http://www.progonos.com/furuti/MapProj/Normal/TOC/cartTOC.html) - A good introduction to projected coordinate systems
* [Spatialreference.org] (http://spatialreference.org/) - Source for coordinate system information.
* [ESRI Shapefile Specs] (http://www.esri.com/library/whitepapers/pdfs/shapefile.pdf) - Shapefile specifications.
## References