### - o -

- octant() : geos::noding::Octant
- OffsetCurveSetBuilder() : geos::operation::buffer::OffsetCurveSetBuilder
- operator=() : geos::geom::Envelope
- operator[]() : geos::geom::GeometryList
- orientationIndex() : geos::geom::LineSegment , geos::algorithm::CGAlgorithms
- overlap() : geos::index::chain::MonotoneChainOverlapAction
- overlaps() : geos::geom::Geometry
- OverlayOp() : geos::operation::overlay::OverlayOp