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Windows-based program which allows the user to convert coordinates between Geographic, State Plane and UTM systems on the NAD 27, the NAD 83 and HARNs.

DSWorld v2.09
DSWorld plots NGS network points by state, county and type (vertical or horizontal) in Google Earth. Google Earth must be installed prior to running DSWorld.

Online Magnetic Declination Computer
Computes the estimated values of Earth’s magnetic field, including magnetic declination, based on the current International Geomagnetic Reference Field.