ProjPicker (projection picker) is a Python module that allows the user to select all coordinate reference systems (CRSs) whose extent completely contains given points, polylines, polygons, and bounding boxes using set-theoretic logical operators in a postfix notation. The goal is to make it easy and visual to select a desired projection by location. This project was motivated by a GRASS GIS feature request. A new GRASS GIS module g.projpicker that wraps around this project is available. It is a work in progress; join discussions.


ProjPicker running on Android using Termux


  1. Install Termux from F-Droid
  2. Run it from Android
  3. Install Python: pkg install python
  4. Install ProjPicker: pip install projpicker