# PROJ

Canonical: https://gisforweb.com/tools/proj/

Generic coordinate transformation library for converting between different CRS.

PROJ is a generic coordinate transformation software that transforms coordinates from one coordinate reference system (CRS) to another. It's the foundational library used by most GIS software.

## Details

- Type: library

- Categories: data-processing

- Open source: Yes

- Pricing model: open-source

- License: MIT

## Features

- Transforms coordinates between coordinate reference systems

- Supports datum shifts and grid-based transformations

- Accepts WKT, PROJJSON and PROJ string definitions

- CLI tools including projinfo, cs2cs and cct

- Ships with SQLite database of CRS definitions

- Foundational dependency of GDAL, QGIS and PostGIS

## Project sources

- Website: https://proj.org

- Repository: https://github.com/OSGeo/PROJ

Directory descriptions are summaries. Verify current capabilities and terms with the project sources.