Photographic data cannot be easily converted to heightmap altitude data, as the image pixel data does not directly represent the altitude of each location. Raster photos contain standard visual images taken with a photographic camera, whereas DEM data is normally accumulated using a radar or laser or similar altitude measurement system. The resolution and quality of currently available DEM data varies considerably, with the majority of data being of such low resolution that it is only useful for GIS or high-altitude imaging and shaded relief rendering.ĭEM data should not be confused with actual raster photo images, such as seen on GoogleEarth at or the Mars HiRISE project at.
This data can be converted into either a grayscale heightmap or a 3-dimensional mesh representation of the location that was surveyed. Importing Heightmaps into the Unreal EngineĪ Digital Elevation Model ("DEM") is a data file that contains a rasterized grid of elevation sample points usually acquired from a remote sensing system such as an orbiting radar satellite.Preparing DEM Data for use in the Unreal Engine.
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