In Lesson 12: Elevation data, we've learned how to import elevation data to ATLAS and visualize it as a heatmap. Now let's move forward and know how to remove objects from the surface.
In many cases, DEM generated by the photogrammetry process may contain unwanted objects distorting the volume measurements. This can be an excavator on the pile top or some vegetation. ATLAS can interpolate elevation data within the polygon.
First of all, let's specify the region for interpolation. We'll use our standard annotation tool for that and draw a polygon around the vegetated area.
Remember that polygon can be either manually added or be a result of automatic detection (please refer to Lesson 8: Detection on a map - territory segmentation for more information on AI detection).
Now go to Layers->Elevation and open the context menu of your DEM layer. Then select "DEM interpolation"
In the dialog, select object type to use for interpolation, select either it as a manual annotation or detected objects, and add the name of the new DSM layer. Then hit "Run".
After some time of processing, you'll see the result. The annotated object now has the same elevation as it's border. Resulting GeoTiff can be downloaded from Layers->Elevation->dem-without-vegetation
Updated 10 months ago