Let’s say the latest version of ArcMap includes the definition of your country’s latest coordinate system and you would like to use it in your version of ArcMap. For that you need to export the new definition and import the coordinate system to your software. In this post, I demonstrate how you can perform this operation using the example of GDA2020 VicGrid (EPSG::7899) coordinate system used in Australia.
To export the GDA2020 VicGrid definition from the latest ArcMap, go to “Data Frame Properties” and select the “Coordinate System” tab. Browse or search for the definition you would like to export. Right click on the definition and select the “Save As…” option. Save the .prj file to a desired location. The .prj file stores a well-known text (WKT) string definition of the coordinate system. You can view it in any text editor.
