Version 22 (modified by sgillies, 12 years ago) (diff)

link to prepared geometries

GEOS - Geometry Engine, Open Source

GEOS (Geometry Engine - Open Source) is a C++ port of the Java Topology Suite (JTS). As such, it aims to contain the complete functionality of JTS in C++. This includes all the OpenGIS Simple Features for SQL spatial predicate functions and spatial operators, as well as specific JTS enhanced topology functions.


Build and Install


The following instructions are dedicated to users of Unix-like systems (Linux, Mac OS X, Solaris, etc.)

Download the latest source code release and issue following commands:

make install

For more details about configuration options run:

./configure --help


If you use Microsoft Visual C++ (7.1 or later) compiler, you can build GEOS using NMAKE program and provided files:

nmake /f MSVC_VER=1400

where 1400 is version number of Visual C++ compiler, here Visual C++ 8.0 from Visual Studio 2005 (supported versions are 1300, 1310, 1400 and 1500). The bootstrap.bat step is required to generate a couple of header files.

In order to build debug configuration of GEOS, additional flag DEBUG=1 is required:

nmake /f MSVC_VER=1400 DEBUG=1


Bug Reporting

You will need an OSGeo user account to submit bugs here. A "New Ticket" button will appear once you have logged in.

When submitting bugs caused by particular geometries (TopologyExceptions, for example), you must submit the geometries that cause the failure, preferably in hex-encoded WKB, so that we can re-produce the failure cases.

Mailing Lists

SVN Repository



The GEOS project is run by a Project Steering Committee made up of developers and contributors to the project. Major project decisions are made via a Request for Comments process, where proposals are first documented and then voted on by the steering committee.

  • RFC-1 - Project Steering Committee
  • RFC-2 - Committer Guidelines
  • RFC-3 - Thread Safe CAPI

Other Information

Wiki / Trac Information

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