On Apr 20 10:49, Marco Atzeri wrote:
> 
> Already present in most of the distributions
> 
> ---------------------------------------------------------------------
>  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.
> 
>     Geometries: Point, LineString, Polygon, MultiPoint, MultiLineString,
> MultiPolygon, GeometryCollection
>     Predicates: Intersects, Touches, Disjoint, Crosses, Within, Contains,
> Overlaps, Equals, Covers
>     Operations: Union, Distance, Intersection, Symmetric Difference, Convex
> Hull, Envelope, Buffer, Simplify, Polygon Assembly, Valid, Area, Length,
>     Prepared geometries (pre-spatially indexed)
>     STR spatial index
>     OGC Well Known Text (WKT) and Well Known Binary (WKB) encoders and
> decoders.
>     C and C++ API (C API gives long term ABI stability)
>     Thread safe (using the reentrant API)
> ------------------------------------------------------------------------


Sure, go ahead.


Thanks,
Corinna

-- 
Corinna Vinschen                  Please, send mails regarding Cygwin to
Cygwin Maintainer                 cygwin AT cygwin DOT com
Red Hat