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SeisSoft - http://www.connect.net/jbanta/
Producers of projection and datum transform software. |
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CoordTrans - http://franson.biz/coordtrans
Convert geographic coordinates between UTM, WGS84, NAD83, NAD27 and other national grids. |
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Decimaldegrees - http://www.decimaldegrees.com
Investigation of and experimentation with various GIS technologies, and the Internet. Latitude, longitude conversion and geocoding tools. |
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http://www.zipmath.com/world.html - http://www.zipmath.com/world.html
World database with latitude and longitude coordinates. Includes formula for calculating the distance between any two world cities. |