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    http://franson.biz/coordtrans   » CoordTrans - Convert geographic coordinates between UTM, WGS84, NAD83, NAD27 and other national grids.

    http://www.decimaldegrees.com   » Decimaldegrees - Investigation of and experimentation with various GIS technologies, and the Internet. Latitude, longitude conversion and geocoding tools.

    http://www.connect.net/jbanta/   » SeisSoft - Producers of projection and datum transform software.

    http://www.zipmath.com/world.html   » ZipMath - World database with latitude and longitude coordinates. Includes formula for calculating the distance between any two world cities.


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