29. Verwijzingen naar literatuur en web
GDAL-SOFTWARE-SUITE. Geospatial data abstraction library. https://gdal.org, 2013.
GRASS-PROJECT. Geographic resource analysis support system. https://grass.osgeo.org, 2013.
NETELER, M., AND MITASOVA, H. Open source gis: A grass gis approach, 2008.
OGR-SOFTWARE-SUITE. Geospatial data abstraction library. https://gdal.org, 2013.
OPEN-GEOSPATIAL-CONSORTIUM. Web map service (1.1.1) implementation specification. https://portal.opengeospatial.org, 2002.
OPEN-GEOSPATIAL-CONSORTIUM. Web map service (1.3.0) implementation specification. https://portal.opengeospatial.org, 2004.
POSTGIS-PROJECT. Spatial support for postgresql. http://postgis.refractions.net/, 2013.