Downloading G.Projector 3.0.3 for Mac from the developer's website was possible when we last checked. We cannot confirm if there is a free download of this app available. G.Projector for Mac lies within Lifestyle Tools, more precisely Travel. We recommend checking the downloaded files with any free antivirus. This free Mac application was originally developed by Goddard Space Flight Center.
From the developer:
G.Projector is a cross-platform application which can transform an equirectangular map image into one of over 90 global and regional map projections. Longitude-latitude gridlines and continental outlines may be drawn on the map, and the resulting image may be saved to disk in GIF, JPEG, PDF, PNG, PS or TIFF form.
You may want to check out more Mac applications, such as MOOS Project Viewer, Onepoint Project or Noun Project, which might be related to G.Projector.
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