Open Source GIS
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An open source application by definition is software that you can freely access and modify the source code for. Open source projects typically are worked on by a community of volunteer programmers. Open source GIS programs are based on different base programming languages.
Since I got a crackberry cellphone that geotags images when I take them using its built in GPS, I have become a photo snapping lunatic. Of course one’s lunacy needs some way to manifest itself using FOSSGIS so I am going to decribe here a workflow to enable you to enjoy the thrills of geotagged imagery in QGIS even if you aren’t the proud owner of a completely proprietary crackberry phone!
[APPMOD][07.11.10] Brut Google Maps 220.127.116.1186-brut17
Open Source Blogs
ESRI's ArcGIS Server and ArcIMS products use a different EPSG code for web mercator than most open source projects do.
GIS around the world
Web GIS Organizations
Web GIS Software
In SUAS Map Server I used Openlayers to display WMS layers in EPSG:4326 SRS with Google Map, I found the WMS overlays are always be transformed, now i kown the reason.