The first, and more easy, is to make a “grid” for each DTM and to calculate the volume for the sum of each paraleliped formed. This is done with a single order, “Tools/Make 3D grid”, where you can select between to calculate a single grid of points or a grid of points which elevation is the difference between two DTMs. After you can use “Tools/Grid Volume” to get the volume in cubic meters.
The second, and more accurate, is to calculate the volume between two triangulations projecting each of it in the other and calculating a new triangulation as result. It’s a litle more complicated to explain but the calculated volume is the exact. This option is in the “Applications/DTMs intersection” in the main menu of the “graphic dialog box”. After to make the DTMs intersection you can use “Applications/Model volume” in the main menu to get, in cubic meters, the total volume between them.Read more at land4us.blogspot.com |
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