Using GeoCalc Mode provides
added geodetic support to the Global Mapper application, with the ability
to access the Geographic
Calculator's geodetic library in the coordinate transformation libraries
in Global Mapper.
Instructions for activating GeoCalc Mode in Global Mapper can be found here. You will need a license for Geographic Calculator in order to enable the GeoCalc Mode tool.
Using the Geographic Calculator GeoCalc library in Global Mapper will provide access to:
Vertical datum transformation support for dozens
of local geoids, ellipsoids, and local offset models
VDatum support for Tidal vertical references
in North America
Custom coordinate system support and easy sharing
of custom parameters between multiple users
Administrative control of geodetic parameters
so users only see and use what you decide
For more information on specific supported datums and coordinate systems for the Geographic Calculator, it is recommended that you install the application, register for an evaluation or user license, and browse the application's Datasource library.