Currently, OpenJUMP (a Java based GIS application) is only 2D aware. This is a severe limitation to future expansion of OpenJUMP functionality. We live in a 3D world. A program designed to model that world should be capable of operating with 3D data. In this project, I will add the foundation needed for 3D modeling to the OpenJUMP core, then program a plug-in to read, write, and display TIN (triangulated irregular network) files as a demonstration of the new 3D functionality. Seamless compatibility with the current OpenJUMP code base and coding style will be a primary goal. In order to simultaneously display both 2D and 3D data within the SWING framework, Java OpenGL (JOGL) will be used. Java6 will be targeted in order to take advantage of the hardware accelerated 2D pipeline.