G.Projector 3 — Map Projection Explorer

Download G.Projector

G.Projector requires a computer with Java 11 (or later version) installed.

The current version of G.Projector is 3.2.4, released 2024-02-25.

Install and Run G.Projector

After downloading the appropriate G.Projector archive linked above, uncompress the archive file on your desktop. Within is a README text file with an explanation of the contents of the download, instructions on how to install and launch the application, and some notes on possible launch bugs and/or performance tuning.

We would like to point out here the following possible installation and launch issues:

If you find that after download and installation, G.Projector won't start, a possible reason might be that you don't have a Java Runtime Engine (JRE) installed on your computer, or that the G.Projector does not launch cannot find or is incompatible your Java installation.

On macOS: There have been reports that G.Projector for macOS fails to launch on recent Macs built with "Apple silicon" ARM chips. If this is the case for you, you should first see if G.Projector will work with a different Java install. See the JAVA_11 README file for suggestions about that. Also note that the G.Projector downloads page now includes an ARM-specific version, which requires that the Java install also be ARM-specific.

Some users who have a second display attached to their Mac have reported G.Projector does not respond after they select an input file via the filechooser dialog. If you experience this, please download and try the version above labeled (JFC), which uses the Java filechooser.

On Windows: You must extract G.Projector from the ZIP archive before you try to run it. If you simply open the ZIP file and then double-click on the G.Projector icon, you will get a class-loader error because it cannot access certain files.

G.Projector for Windows requires that certain keys/values regarding the Java installation be set in the Windows Registry. However, some alternative Java distributions may not set these keys or else may require that you explicitly set them during installation. See the JAVA_11 readme file.

On Linux etc: The TGZ archive of G.Projector "generic" was created using a BSD tar on macOS. Using GNU-tar to uncompress the package will probably print several "Ignoring unknown extended header keyword" warning messages. You should be able to ignore these messages.

Download Map Overlays

G.Projector's "standard" selection of map overlays is built into the application. Additional map overlays may be opened for a single session or added to your favorites library for continued use. Overlays must be CNO or CNOB outlines or else outline or multipoint SHP shapefiles. G.Projector does not understand projected shapefiles.

A selection of CNO or CNOB files is available for download from the Panoply application webpage.

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