This is a free online volcano database, with information about all the currently known volcanoes. Every volcano features the basic statistics, as well as a very detailed map, with bot urban and satellite photos, and a google earth placeholder.

PhotoSat is producing elevation data with much better elevation accuracy and horizontal resolution than conventional stereo photo elevation mapping processes.

KOREC are a leading distributor of Trimble Surveying Equipment worldwide, including GPS and GIS Mapping Systems and Laser Levels to Construction, Surveying and GIS Mapping Industries.

Professional earthquake database with information about the currently known earthquakes in history, with RSS feeds and an earthquake search engine.