Fig. 2
From: An open source virtual globe rendering engine for 3D applications: NASA World Wind

Overview of the structure of NASA World Wind classes with base objects and their relationships. Image courtesy of Schubert and Collins [23]
From: An open source virtual globe rendering engine for 3D applications: NASA World Wind
Overview of the structure of NASA World Wind classes with base objects and their relationships. Image courtesy of Schubert and Collins [23]