All Questions
68
questions
0
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0
answers
33
views
Find Python library to work with DEM in GeoTIFF format [duplicate]
I'm looking for a library for Python that will allow me to do the following thing:
I have a DEM in GeoTIFF format, and I have a list of points with coordinates in Lat/Lon format. I need these points ...
0
votes
0
answers
21
views
DEM update/interpolation algorithm from control points
Context: I have a reference DEM, and Icesat-2 points covering some parts of it. The DEM is from 2012 and the Icesat-2 points range from 2018 to 2023.
Goal: I am looking for a way to 'update' the ...
- 309
-1
votes
1
answer
36
views
Python CLI/Package to handle DTM conversion from raster to mesh (obj or ply) [closed]
I was wondering if there is a Python CLI, package or even a QGIS tool that makes it possible to convert a DEM from raster to mesh. The only way I found at the moment is sampling points from the raster,...
- 15
0
votes
1
answer
49
views
Outlier's neighbours of a raster analysis in Python/GIS
Starting with point clouds from various drone flights, I created a 0'1x0'1m cell raster with the DEM of Differences (DoD). Next, in order to clean outliers cells, I calculated the 0'1 and 99'9 ...
- 23
2
votes
0
answers
58
views
Getting distance between DEM's zero elevation and earth's center [closed]
I'm using the DHM25 DEM available here:
https://www.swisstopo.admin.ch/en/geodata/height/dhm25.html
EPSG:21781+5728
(Swiss CH1903 / LV03 + LN02 height)
I need to use the earth's radius under ...
- 129
0
votes
0
answers
25
views
Generate and populate a grid from points in a geopandas dataframe [duplicate]
Context:
I have a geopandas dataframe, with two columns
'geometry': full of shapely.geometry.point.Point.
'h_mean': gathering the height of a surface at those points
I want to create a 2D spatial ...
- 143
1
vote
1
answer
244
views
Estimate solar potential in Python with DEM
I am trying to calculate the solar potential/solar exposure of the littoral zones for a few lakes in Python. I already got the bathymetry/topographic data but I am still searching for ways to ...
- 29
0
votes
2
answers
307
views
Trying to get topography via elevation package Python
So I'm trying to get some topography. In Detail some parts of the panama canal. I tried using the elevation python package. Here is my code so far:
import elevation
min_lat, max_lat = 8.0, 9.5
...
- 1
2
votes
0
answers
111
views
Calculating slope-adjusted surface area from DSM
Is there a (simple) way to calculate the surface area from a regular DSM raster considering the slope/aspect? In my case I've got a DSM (0.5m resolution) with a building, I would like to calculate the ...
- 21
1
vote
0
answers
89
views
Raster and vector analysis for profile extraction in Python [closed]
I have quite complex problem and I have two options to solve it. For a multiline shapefile (river) I would like to get cross profiles and extract DEM values for the lines.
I was thinking 1: Create ...
- 11
0
votes
0
answers
452
views
Vertical transformation of DEM from EPSG:3035 to EPSG:4326
I am trying to convert a DEM file from EPSG:3035 (ETRS89-extended / LAEA Europe) to EPSG:4326 (WGS 84) with gdalwarp. EPSG:3035 uses the European Terrestrial Reference System 1989 ensemble datum where ...
- 329
2
votes
0
answers
127
views
Calculating upstream (contributing) area for >10,000 points using Python
I would like to create polygons of the contributing area for > 10,000 points.
I have all information that I need for this, including a 30m DEM, a river network (LineString geodataframe file) and ...
- 215
1
vote
0
answers
390
views
Python library for hydrology calculations for multiple points
I have a DEM (TIFF) with multiple points, which mark wells (right term?) of an underground pipe network:
I was wondering if there is a Python library which uses the elevation of the DEM to generate a ...
- 89
1
vote
0
answers
167
views
How to ignore -3.4028235e+38 as a minimum value in a DEM?
I am working with a DEM with the range of 99.93-169.32 (This range can be seen in QGIS). I am trying to open this DEM using cv2 or rasterio in python, and after that apply some filtering methods to ...
- 204
-1
votes
1
answer
857
views
How to get the ground level altitude from DSM or Point Cloud using Python [closed]
I am trying to get the ground level altitude from either DSM or PC. I am new to GIS and Python and still learning, any pointer or source?
I have a latitude and longitude of the point, for the same I ...
- 101