2D area is calculated from a flat surface in plan view. 3D area takes into account 3D characteristics of the surface. A 3D polygon with peaks and valleys will have a larger 3D surface area then a flattened "plan view representation" of the same polygon in 2D.
How can I calculate 3D surface area base on slope in GIS for each morphological units in watershed? Are there any different methods that help me to calculate 3D surface in morphological units?
Most GIS applications will give you the true 3D area of a DEM of any surface and volume. If you have multiple DEM layers just add or subtract your DEM layers to get both true 3D area and volume. Here is a video using water as one layer and used to discover volume and surface area above and below the water line. You can also apply it to different layered DEMs also.
https://youtu.be/TIKkVdHsk9I
Hope this helps.
Dear Dr. José Luis Casamor, Thanks alot for your help. But how can I have your awk script?”
Dear Dr. José Luis Casamor, thank you for your attention. My email address is : [email protected]
Hi José Luis Casamor, Could you please share your script with me too, I am facing the same problem as described by Taher.
Thank.
- Badges
- Science topic
- Similar topics
- Geoscience
- Geoinformatics
- Geographic Information System