ProjPicker

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. See its documentation. The project uses a copy of GetOSM to download OpenStreetMap tiles.

ProjPicker Web is online at https://projpicker.pythonanywhere.com/.

For GRASS GIS, a new module g.projpicker that wraps around this project is available.

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
5. Start the ProjPicker web server: projpicker -S
6. Open http://localhost:8000/ in the browser

Workshop

• https://workshop.isnew.info/projpicker/ (work in progress)

Change log

See here.

Subprojects

• ProjPicker ArcGIS Pro toolbox (Windows)
• ProjPicker GUI (Linux and macOS; replaced by the core wxPython-based GUI)
• ProjPicker JavaScript (not under active development)

Ideas

1. Client-only web application that doesn't require Python in the backend
2. CRS hints: Crowdsourcing agency and product information? Is usage from PROJ enough?

Versioning

N(.N)*[{a|b|rc}N][.postN][.devN]

• PEP 440
• {a|b|rc|.dev}N towards and .postN away from the release
• Not fully compatible with semantic versioning
• Not using build numbers marching away from or towards a release, but check this interesting comment.

Sponsor

This project was kindly funded by the Institute for Environmental and Spatial Analysis (IESA) at the University of North Georgia (UNG).

License

Copyright (C) 2021 Huidae Cho and Owen Smith

This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with this program. If not, see <https://www.gnu.org/licenses/>.