PROJ

PROJ is a generic coordinate transformation software, that transforms coordinates from one coordinate reference system (CRS) to another. This includes cartographic projections as well as geodetic transformations.

For more information on the PROJ.4 project please see the web page at:

http://proj4.org/

The PROJ.4 mailing list can be found at:

http://lists.maptools.org/mailman/listinfo/proj

See the NEWS file for changes between versions.

The following command line utilities are included in the PROJ package:

• proj, for cartographic projection of geodetic coordinates
• cs2cs, for transformation from one CRS to another CRS.
• geod, for geodesic (great circle) computations.
• cct, for generic Coordinate Conversions and Transformations.
• gie, the Geospatial Integrity Investigation Environment.

Installation

Building with CMake

cd proj
mkdir build
cd build
cmake ..
cmake --build .

On Windows, one may need to specify generator:

cmake -G "Visual Studio 15 2017" ..

Building on Unix/Linux

FSF's configuration procedure is used to ease installation of the PROJ system.

The default destination path prefix for installed files is /usr/local. Results from the installation script will be placed into subdirectories bin, include, lib, man/man1 and man/man3. If this default path prefix is proper, then execute:

./configure

If another path prefix is required, then execute:

./configure --prefix=/my/path

In either case, the directory of the prefix path must exist and be writable by the installer.

After executing configure, execute:

make
make install

The install target will create, if necessary, all required sub-directories.

Building on Windows with NMAKE

PROJ can be built with Microsoft Visual C/C++ using the makefile.vc in the PROJ directory. First edit the PROJ\nmake.opt and modify the INSTDIR value at the top to point to the directory where the PROJ tree shall be installed. If you want to install into C:\PROJ, it can remain unchanged. Then use the makefile.vc to build the software e.g.:

C:\> cd proj
C:\PROJ> nmake /f makefile.vc
C:\PROJ> nmake /f makefile.vc install-all

Note that you have to have the VC++ environment variables, and path setup properly. This may involve running the VCVARS32.BAT script out of the Visual C++ tree.

The makefile.vc builds proj.exe, proj.dll and proj.lib.

Distribution files and format

Sources are distributed in one or more files. The principle elements of the system are in a compress tar file named PROJ-x.y.z.tar.gz where "x" will indicate major release number, "y" indicates minor release number and "z" indicates the patch number of the release.

In addition to the PROJ software package, a distribution of datum conversion grid files is also available. The grid package is distributed under the name PROJ-datumgrid-x.y.zip, where "x" is the major release version and "y" the minor release version numbers. The grid package can be downloaded from the PROJ.4 website.