JTS Topology Suite

The JTS Topology Suite is a geometry library for 2D objects. It focusses on spatial predicates and functions as needed in the GIS domain, however it can be used beyond geographic use cases. It has originally been developed by Vividsolutions, then been maintained by Tsusiat Software and has recently been moved to LocationTech.

JTS @ Tsusiat Software, Tsusiat Software, JTS @ LocationTech, Wikipedia page

Useful resources