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 project please see the web page at:
The PROJ mailing list can be found at:
https://lists.osgeo.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.
- projinfo, for geodetic object and coordinate operation queries
PROJ requires C and C++11 compilers. It also requires SQLite3 (headers, library and executable).
cd proj
mkdir build
cd build
cmake ..
cmake --build .
On Windows, one may need to specify generator:
cmake -G "Visual Studio 15 2017" ..
If the SQLite3 dependency is installed in a custom location, specify the paths to the include directory and the library:
cmake -DSQLITE3_INCLUDE_DIR=/opt/SQLite/include -DSQLITE3_LIBRARY=/opt/SQLite/lib/libsqlite3.so ..
Tests are run with
ctest
The test suite requires that the proj-datumgrid package is installed
in PROJ_LIB.
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
See the note below if you are building PROJ directly from the git repository.
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.
Tests are run with
make check
The test suite requires that the proj-datumgrid package is installed
in PROJ_LIB.
If you are building from the git repository you have to first run
./autogen.sh
which will generate a configure script that can be used as described above.
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, distributions of datum
conversion grid files and PROJ parameter files are 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. Similarly regional packages are distributed. The
regional packages contain resources that are not essential to the
functionality of PROJ but still of value to users in the region
specific to the package. All grids that were in proj-datumgrids-1.6
remain in proj-datumgrids-1.7; the regional datumgrid files contain
grids for datums not previously supported (prior to PROJ 5.0.0).
The resource packages can be downloaded from the PROJ.4 website.
More info on the contents of the various resource packages can be found at the proj-datumgrid GitHub repository.
The resource file packages should be extracted to PROJ_LIB
where PROJ will find them after installation. The default location of
PROJ_LIB on UNIX-based systems is /usr/local/share/proj but it may
be changed to a different directory. On Windows you have to define
PROJ_LIB yourself.
See CITATION