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Results tagged with topography
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user 84455
The study and mapping of land surfaces, including relief (relative positions and elevations) and the position of natural and constructed features.
5
votes
How do I assign a height to each individual contour line using QGIS. Raster > Extraction > C...
If you are using QGIS 3.10 or later, you have better control over the GDAL tools - See the visual change log.
It means, GDAL-Contour tool can take direct input from users to which elevation (height) …
- 31.2k
2
votes
How would I determine my search radius when conducting a Topographic Position Index in SAGA ...
It is good you started to work with TPI on SAGA, since it is rare software which cares TPI's scale-dependent nature.
In the poster linked below you will find answers.
Andrew D. Weiss Topographic Pos …
- 31.2k
2
votes
How to fix unusual initial DEM input values and derivative raster output values in SAGA GIS ...
It seems SAGA has an issue with its Import Raster function to read GeoTiff tags. The strange NoData value (-3.40282e+038) is probably (-32767) in the original dataset.
As already pointed out by @Rex …
- 31.2k
1
vote
Accepted
Adding elevation point data and lines to topography plot using ggplot2
Just as an example, I used GADM country outline and two city locations (notional).
GADM dataset was downloaded as sp object, and plotted by geom_polygon()
A dataframe of two points (my_points) was c …
- 31.2k