Linked Questions
12 questions linked to/from Getting incorrect slope values from an ASTER DEM in QGIS?
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Slope layer with false results in QGIS? [duplicate]
After the DEM creation, I wanted to create slope layer.
However, the result has not satisfied me. I don't think the slope map is correct. Have you ever encountered false calculated terrain map?
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- 257
1
vote
0
answers
185
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Slope values are not accurate in QGIS? [duplicate]
Edit: Yes, using a DEM for a bigger area worked. However, now I'm getting crazy slope values, everything is around 90 degrees. It's a hillside vineyard, I don't think it's vertical.
I am trying to ...
- 181
1
vote
0
answers
64
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Do I need z scale factor? [duplicate]
I am making a slope raster in QGIS from DEM.
My DEM was made using WGS84 coordinates system.
Do I need to be using a z scale conversion factor ?
If so what would that be?
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0
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0
answers
58
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QGIS Slope Analysis produces strange values [duplicate]
I am performing a slope analysis (Raster>Analysis>Slope) of a US Geological Survey DEM.
I am calculating the slope of a raster DEM saved as a TIF. I set up the slope analysis as per the picture ...
- 141
0
votes
0
answers
48
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Incorrect slope values for points in QGIS [duplicate]
I'm trying to determine the slope of sampling points in QGIS 3.4, but the values are all ~89.99°, which I know is incorrect. Pretty sure it's an issue when creating the slope raster.
Based on the ...
- 305
12
votes
2
answers
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Scale and Z factor have no effect on hillshade analysis in QGIS
I used an SRTM DEM to create a hillshade in QGIS 2.2.0. However, the resultant hillshade seems to be vertically exaggerated. Also, changing the settings for scale and z-factor does not have any effect ...
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6
votes
1
answer
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Hillshade shows grid texture artifacts
I tried to make an hillshade and a slope map from a DTM using QGIS but the result shows some artifacts.
As you can see in the picture there is a grid texture in the hillshade and the slope map.
I ...
- 61
1
vote
1
answer
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Calculating Slope from DEM in QGIS
I have a world DEM raster in QGIS in EPSG:4326 with elevation units in meters. I'm trying to get a raster of the slope of the terrain, and I'm doing so using the "Slope" tool under "...
- 55
1
vote
1
answer
602
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'Scale' value in slope percent map in QGIS? [duplicate]
What value should be used for scale while calculating slope percent in QGIS?
Some documents suggest is as 111120 and some as 365130.
I am using ESPG 4326 projection and do I need to convert this ...
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3
votes
1
answer
263
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Strange output from QGIS Raster Terrain Analysis plugin
This is closely related to several other questions on this site: here, here, here etc.
However, my issue is not resolved by following the answers provided.
I am using the Raster Terrain Analysis ...
- 571
1
vote
0
answers
257
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QGIS/GDALDEM SLOPE Output Has Contoured Or Terraced Texture
I have been trying to greatly reduce or eliminate the contour-like texture that appears in my output from gdaldem slope. The image, below, demonstrates this textural effect.
The texture of the ...
- 51
1
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1
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104
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QGIS: smooth crs transformation
I have an elevation-raster in .hgt format with CRS EPSG:4326. My aim is to calculate aspect and slope which - as far as I understand - are difficult to obtain when using geographic CRS. Projected CRS ...
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