Researchers at Iowa State University have developed TouchTerrain, software that converts digital elevation models into 3D printable files. TouchTerrain, as the tool is called, enables users to create topographical models for 3D printing.
The software developed by Chris Harding and Franek Hasiuk reads digital elevation models (DEM) and generates 3D mesh model files from them. These files can then be used directly for 3D printing. TouchTerrain supports both STL and OBJ formats.
A special feature of TouchTerrain is the automatic UTM projection and adaptive downsampling function for data obtained online. This optimises the data for 3D printing without the user having to intervene manually. The software can split model files into several parts (tiles), which is particularly useful for large terrain models.
TouchTerrain is available in two versions: as stand-alone software and as a web application. The web version, which is available at touchterrain.org, should be sufficient for most users. It enables the direct processing of elevation data from Google Earth Engine.
TouchTerrain offers additional functions for advanced users. For example, local raster files can also be used as input. This allows you to process your own or specialised elevation data. Information on this can be found on GitHub.
The developers see a wide range of possible applications for TouchTerrain. The potential areas of application range from the creation of illustrative models for geology lessons to the visualisation of complex terrain structures in research.
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