How to create a DEM or DSM file?

[anthonyhermanklj]

You can get a DSM/DEM for terrain following…

400 Acre site guidelines

So I still seem to need a DSM file on my SD card or on internal memory for Terrain Follow to work. To get that I went here: https://apps.nationalmap.gov/downloader/#/ [image] select the 1/3 arc sec DEM (just right density for M300), click search products and download it (geotiff). use your preferred GIS to clip it down to ~4sq miles (to fit within the M300’s max dsm file size). upload the geotiff to your controller and select that file. it will calc it out and give you a color spectrum on …

Or you can make your own in QGIS (its free).
there are several YouTube videos on this… but here’s one to get you started. https://www.youtube.com/watch?v=r9Zy9XFOf9o

If you’re a survey firm… I’d need to know what software you already have… odds are you can use that. ie TBC, AutoCAD/ReCAP, ESRI GIS… ect… all have features that enable this.
Also it slightly depends on what type of DEM/DSM you want… raster or triangulation surface?