![]() It spreads the elevation values across 16 bit values and replaces null values with 0. Below is a sample expression that will achieve these results using the raster calculator tool in ArcMap. The Final step is to fill the no data cells in the DEM within the extent of the map and stretch the elevation values. In ArcMap this can be achieved by using the resample tool and defining a snap raster in the environment settings. Next resample either the DEM or the map so that their resolution and pixel alignment match. Therefore flat areas will have DEM values of 0.įirst, georeference the map to align it with the elevation data. ![]() Where the map is extruded in Blender will depend on where there are elevation values in the DEM. There are many ways to achieve the necessary results, but the end product must be two images with exactly the same size, resolution, and spatial extent. High resolution DEMs can also be generated from LiDAR point clouds or similar data.Įnsure the DEM and map are the same size and resolution Both the map and DEM used in this tutorial are freely available from the Government of Alberta. DEM images can be downloaded from many sources on the internet such as government open data portals. Then the map image is draped over top of the 3D surface and rendered with realistic lighting. The software will generate a 3D surface by extruding parts of the image using DEM pixel values as the magnitude of extrusion. Blender can use rasterized elevation data in a similar way to GIS software such as ArcGIS and QGIS. The two images used to create the maps below can be downloaded Here.Ī 3D map can be created in Blender using two images: A map of the area of interest and a digital elevation model (DEM) that covers the area. Render a 3D map with realistic lighting.Create a 3D surface from elevation data in Blender.Modify GIS data so it is suitable for Blender. ![]() ![]() By the end of this article you will understand how to: This article is a brief introduction to using Blender to visualize GIS data for those with some GIS and raster manipulation experience. Blender is a versatile open source 3D creation suite that is able to render maps with realistic lighting and textures.
0 Comments
Leave a Reply. |