3D Maps are the maps that contain the third dimension, height as a key component. 3D maps generally can be simple terrain maps, and more detailed maps with 3D buildings and monuments represented as part of the details. Level of detail (LoD) defines the extent to which the objects are represented and detailed in 3D Maps. Popular applications such as Google Earth, Bing Maps etc. provide detailed 3D Maps of major cities and important monuments across the globe.