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Results tagged with topography
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user 35151
The study and mapping of land surfaces, including relief (relative positions and elevations) and the position of natural and constructed features.
5
votes
Identifying highs on DEM using ArcGIS Spatial Analyst?
One easy way of doing this would be to inverse your DEM by multiplying it by negative one (Raster Calculator) then running the Fill tool on the inverted DEM. Finally, subtract the filled DEM from the …
- 11.1k
1
vote
Accepted
Topographic Index - Why is upslope contributing area divided by downslope contour width and ...
When you perform a flow accumulation on a DEM, the upslope area is defined as all of the inflowing grid cells AND the cell itself. Thus, a grid cell is actually part of its own contributing area. The …
- 11.1k
20
votes
Accepted
Getting Negative Topographic Wetness Index (TWI) values in SAGA GIS?
Again, remember that TWI is meant to be a relative index of wetness based on topography, we're not saying that a cell with a TWI value of 2 is twice as saturated as a cell with a TWI of 1. …
- 11.1k
14
votes
Accepted
Is there a difference between the Planchon & Darboux and Wang and Liu depression filling alg...
From a theoretical point of view depression filling only has one solution, although there can be numerous ways of coming to that solution, which is why there are so many different depression filling a …
- 11.1k