Questions tagged [dem]
For questions about Digital Elevation Models (DEM), Digital Terrain Models (DTM) and Digital Surface Models (DSM)
2,049
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Similar boundary but different spatial resolution
I am not sure if I can express it properly considering the lingo but, I am trying to create maps that show comparison of different spatial resolution in determining soil loss in a given watershed. I ...
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DEM from LiDAR using cloud compare
I am working on overseeing a comprehensive flood analysis project in Bardonecchia, Turin, Italy, post the August 2023 flood event.
I have been handed over the LiDAR file .las in which flood occurs.
I ...
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Delimit a watershed associated with a polygon - ArcGIS Pro
I have nearly the same question as Calculating watershed associated with polygon using DEM and QGIS but for ArcGIS Pro.
I am starting with a polygon representing property boundaries and I need to ...
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How to export an IDW DTM as a GeoTIFF file in R
I have loaded both raster and lidR packages within RStudio and I am trying to export the IDW DTM files but have been receiving errors about 'format'. I have exported a TIN DTM already however with IDW ...
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(QGIS) How to improve Hillshade view of SRTM
I've downloaded some DEMs using opentopography plug in. When I change the render type to hillshade and try to zoom in to actually be able to view anything I just get black lines with a grey background....
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Aligning two orthophotos with Metashape
I am working in Metashape Version 2.0.З. I have very basic skills.
I have two terrain survey results taken by an unknown UAV (the same UAV was used) in different years without reference points on the ...
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55
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Strange parallel lines in the middle of the basin
I prepared a stream network for my study area using ArcGIS. Why am I seeing those strange lines in the middle of the map. I used 3 Second SRTM Derived Digital Elevation Model (DEM) from https://ecat....
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Exporting Multilayered DEM Maps from ArcGIS Pro
I'm currently working on a project in ArcGIS Pro where I've created a map featuring multilayered Digital Elevation Models (DEMs) with various blend modes applied. My goal is to export this map for ...
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Some problems with gdal_translate to translate from GeoTIFF to 32 bit grayscale TIFF, exr or similar [duplicate]
I need 32 bit grayscale DEM map from GeoTIFF to crop it in Photoshop and use in 3D applications as height displacement map. I use Windows and have images copied in OSGeo4W Bin folder so there is no ...
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QGIS smooth mapzen DEM to create a very simplified topographic map
I am using Mapzen global terrain to create a topographic map.
How can I get a very simplified result like on the map of Greece?
Should I use contours lines ? And how to smooth them ? (wich algorithm ...
- 851
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How to fill pits for a DEM/CHM when using the LAScatalog engine?
I'm trying to create a DEM/CHM using the LAScatalog engine. I've followed the steps in the lidRbook. In chapter 6 section 6.4 the post processing fills in areas no missing values for single las files ...
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When loading a DEM in Google Earth Engine, it doesn't load the full map extend
I want to download a digital elevation model for a major part of Europe.
Last time I tried it with the "NASA NASADEM Digital Elevation 30m", wich can be found here: https://developers.google....
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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 ...
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Create a buffer on a single LAS file using lidR
I want to create a buffer for a single LAS file in order to test different algorithims for DTM creation on a small scale before scaling up to all my files using LAScatalog.
I know LAScatalog creates a ...
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Separation of DSM as Building DSM and Canopy Height Model in QGIS
I am currently trying to separate the DSM as Building DSM and Canopy Height Model. I also have DTM, Building Footprint data.
Digital Surface Model
Building Footprints.
For separation I converted the ...
