Geographic Calculator

Geographic Calculator is a Global Coordinate Transformation tool by Blue Marble Geographics.

Download the latest version (2025) by creating a login at the Geographic Calculator website.

Installation and license instructions

After installation, Geographic Calculator users will need to update the settings.json file. Download the settings file below and save it as "settings.json" in "C:\ProgramData\Blue Marble Geographics\Geographic Calculator x64\", overwrite the existing file in there. This will only need to be done once per machine if a machine has multiple users logging into it.

  • settings.json
  • Primary license server: license.cga.harvard.edu, port: 27010

Only computers connected to the Harvard network (LAN or VPN) can access the site license server.

Note that this software is licensed for use for teaching purposes only at Harvard University, and that any funded research or commercial use of the Software is strictly prohibited.

See also: