This repository contains code for projecting OSM locations to arbitrary coordinate reference systems. It is based on the PROJ library. Unlike the code which is included in libosmium which only supports older PROJ versions, this one is for PROJ version 6 and above.
This is untested code just provided as a starting point, because libosmium doesn't support PROJ 6 and above.
To use this include projection.hpp in your program and instantiate the
osmium::geom::GeometryFactory class with the class PROJ_Projection as
template parameter. See the libosmium documentation for details of how to
use the GeometryFactory class.
You need to compile with libproj.