GDEM: 30m resolution global elevation data derived from ASTER satellite images.GSHHS: A Global Self-consistent, Hierarchical, High-resolution Shoreline Database - which basically means it's good quality (no internal inconsistencies, good accuracy).European Environment Agency: Maps and datasets from the European Environment Agency, covering a huge range of physical geography and environmental topics.GeoNetwork: GIS aggregation site including a wide range of data under various categories (both human and physical).Some datasets appears to be of low quality, but others are good. MapCruzin: GIS aggregation site including wide range of data for various areas of the world.Some global datasets, some based on continents, some for specific countries. Koordinates: GIS data aggregation site including data in a number of categories such as elevation, environment, climate etc.To get data, choose Advanced Search and select Geospatial Data Sets from the top drop-down link UNEP GEOdata: A wide range of data from the United Nations Environment Programme including Global Forest Cover, Global Potential Evapotranspiration, Global Average Monthly Temperatures, Dams, Watershed Boundaries and much more.Probably the easiest place to get a simple set of data for a specific country. DIVA-GIS Country Data: A collection of data collected from a number of the sources below - includes administrative areas, inland water, roads and railways, elevation, land cover, population and climate.Produced by the International Steering Committee on Global Mapping. Global Map: A set of consistent GIS layers covering the whole globe at 1km resolution including: transportation, elevation, drainage, vegetation, administrative boundaries, land cover, land use and population centres.Natural Earth - Raster: Includes various raster images, intendedįor use as backgrounds for other data, for example hypsometric tints, satellite derived land cover,.A version of this data is also available in the Wagner VII projection, which has good equal area properties, here. Land, oceans, islands, rivers, lakes, glaciated areas and bathymetry.
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As always, critically examine the data you are using, look at what organisation produced it and what agenda they may have, and beware that there are disputes over some of the data (particularly country boundaries). Beware: The data linked to below may be inaccurate, incomplete, or just plain wrong.