TIN Refinement (or Delaunay Triangulation Refinement) allows you to increase the density of DTM points by adding a centroid point to each TIN triangle, this task can be done automatically or manually.
Manual TIN Refinement allows you to manually add additional elevation data at the centroid of selected triangle. Move cursor to desired triangle location (selected triangle will be highlighted) and click Add Point (or tap anywhere on the Map) to add refinement point.
The following video explains how to perform Manual TIN Refinement on UTM Geo Map APP:
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