- http://www.esa.int – European Space Agency (ESA)
- http://www.esa.int/Education – Educational website of the European Space Agency (ESA)
- https://geonet.esri.com/community/education/blog – Educational blog for GIS on the professional social network of ESRI Inc. – GEONET.
- http://www.youtube.com/geographyuberalles – youtube channel of Joseph Kerski /GIS expert of th Education team of ESRI Inc./ for GIS, geography, STEM, containing over 3500 videos.
- http://spatialreserves.wordpress.com – Spatial Reserves blog (A guide to public domain spatial data), containing useful information about geospatial data an public domains for spatial data.
- https://www.nasa.gov/ – National Aeronautics and Space Administration (NASA)
- https://www.usgs.gov/ – United States Geological Survey, (USGS)