OpenStreetMap is an OpenSource project, an openly licensed map of the world being created by volunteers using local knowlenge, GPS tracks and donated sources, also you can became a OSM mapper.
The open-source world can offers important products to the GIS projects, great solutions like Qgis, GRASS, Leaflet, PostGis, PMapper, Geoserver. For this you can watch the OSGEO Live library.
Leaflet is an open source Javascript library for mobile-friendly interactive maps. The project is developed by Vladimir Agafonkin.
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