Generate 3D terrain for PlexMap 3D
A Digital Terrain Model (DTM) is the central basis for all 3D views created for PlexMap 3D. This tutorial describes how to create DTMs for PlexMap 3D.
Creation of a terrain for PlexMap 3D Anchor
The basis for creating a 3D terrain for PlexMap 3D is a Digital Terrain Model (DTM).
If the terrain model is already available in a Grid type store, the terrain model can be easily stored in a Layer of type (Cesium) with the Store in Layer in the Swtichobard and included as a 3D terrain in a PlexMap 3D view.
If the DTM is available as a point cloud (e.g. in ASCII, LAS or LAZ format), it must first be converted to a grid using an appropriate Switchboard and stored in a Grid type depot. Use the Rasterize function for this conversion in the Switchboard.
To convert a point cloud to a grid, PlexMap Points must be licensed.
Creation of a multi-resolution terrain Anchor
A multi-resolution terrain is a 3D terrain that is composed of several DTMs, each of which has different resolutions.
Multi-resolution terrains are regularly used when, for example, the surrounding area of a city is also a 3D terrain in PlexMap 3D, but the resolution of the DTM in the surrounding area is lower than the resolution of the DTM in the city area. In the multi-resolution terrain, both DTMs are displayed as a contiguous 3D terrain in PlexMap 3D.
To create a multi-resolution terrain, all existing terrain models in Store in Layer are stored under each other in a Layer of type Terrain Proxy (Cesium). The used DTMs are superimposed in the same order as they were stored in the Layer. Therefore, a low resolution terrain model should be placed under a higher resolution terrain model.
The multi-resolution terrain is now ready and can be used in any PlexMap 3D View.