Development

These pages are primarily focused towards developers either contributing to the PROJ project or using the library in their own software.

• Quick start
• Transformations
• Error handling
• Threads
• Reference
• Using PROJ in CMake projects
• Language bindings
• Version 4 to 5 API Migration

Attention

The projects.h header and the functions related to it is considered deprecated from version 5.0.0 and onwards. The header will be removed from PROJ in version 6.0.0 scheduled for release February 1st 2019.

Attention

The nmake build system on Windows will not be supported from version 6.0.0 on onwards. Use CMake instead.

Attention

The proj_api.h header and the functions related to it is considered deprecated from version 5.0.0 and onwards. The header will be removed from PROJ in version 7.0.0 scheduled for release February 1st 2020.

Attention

With the introduction of PROJ 5, behavioural changes has been made to existing functionality. Consult Known differences between versions for the details.