[geos-devel] GEOS 3.0.0 RC1 Released

Paul Ramsey pramsey at refractions.net
Sat Sep 9 14:38:25 EDT 2006

GEOS 3.0.0 RC1 has been released for your gentle consideration.


This release updates the algorithmic basis of GEOS to synchronize  
with JTS 1.7.  As a result of this update a number of bugs have been  
removed and some performance increased.  For API-level users of GEOS,  
a number of new functions are available.

The update to synchronize with JTS was jointly funded by Safe  
Software and Autodesk.  Many thanks for their contribution to the  

The release also includes experimental improvements to the robustness  
of the geometric operators (Union, Difference, SymDifference).  These  
improvements may be included in a future release of JTS.  If you have  
been having topology exceptions in your geometry processing, you may  
find that upgrading to GEOS 3.0.0 will remove the vast majority of them.

The robustness improvements have been funded by the Bavarian State  
Ministry of Agriculture and Forestry and the
State Survey of Bavaria.  Many thanks to these organizations and the  
citizens of Bavaria!

PostGIS users and other applications that use the "C API" can upgrade  
their GEOS simply by running a "./configure ; make ; make install".   
The C API remains binary compatible with earlier versions.  Users of  
the C++ API may have to recompile their applications as well as GEOS  
-- the C++ API remains source compatible with earlier versions but  
may not be binary compatible.

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