Questions tagged [topographic-wetness-index]
The topographic-wetness-index tag has no usage guidance.
6
questions with no upvoted or accepted answers
2
votes
1answer
89 views
Unexpected error while RSAGA raster calculations
I want to use RSAGA package in R to calculate the topographical wetness index. However, while applying the rsaga.wetness.index() function, R gives me an error message (see below).
My question is, ...
2
votes
0answers
342 views
Using SAGA-GIS topographic wetness index in R?
I want to create a topographic wetness index (TWI) in R and I am trying to set an environment according to the help of RSAGA-package but I am always facing with an error appears in a different term.
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1
vote
0answers
27 views
QGIS Flow accumulation tool frozen at 100%
My goal is to apply a topographic wetness index to a DEM using QGIS Version 3.20.2-Odense, running on a macOS laptop. I have clipped my DEM layer for the appropriate study area, and calculated slope ...
1
vote
0answers
45 views
NoData values in soil wetness index
I would like to know why I am getting no data pixels in my soil wetness raster, since none of the source rasters used to calculate the SWI have no data values.
method I used: soil data from HWSD FAO ...
0
votes
0answers
34 views
Raster error calculating TWI with dynatopmodel
I am trying to calculate elevation, upslope and TWI from an ASTER DEM in R using dynatopmodel.
The build_layers function requires that the raster has a resolution of at least 30m and is in a projected ...
0
votes
0answers
99 views
Topographic Wetness Index difference between SAGA and TauDEM
I calculated Topographic Wetness Index (TWI) using SAGA and TauDEM. Overall trend is similar but SAGA returned larger values compared with TauDEM. Sometimes the deviations are as large as 7 or 8. I am ...
