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