All Questions
Tagged with dem interpolation
51
questions
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
vote
1
answer
35
views
ArcGIS JS API RasterShaderReliefRenderer does not color full range of DEM elevation values
I have a DEM of the state of florida as an ImageService, here. I want to render this DEM using nicer colors than black and white using the ArcGIS JS API. Following the example ImageryTileLayer - ...
- 500
0
votes
1
answer
30
views
Interpolated DEM RMSE
I'm trying to figure out the 'true' error associated with interpolated cells in a DEM, which itself is known to have a RMSE of 0.15m.
DEM has RMSE of 0.15
Interpolation model shown by cross-...
- 31
0
votes
1
answer
695
views
Why does no interpolated line appear when I use the 3D Analyst to generate a elevation profile in ArcMap?
I want to generate an elevation profile based on a DTM with ArcMap 3D Analyst but the program does not show the the interpolated line.
I did the following steps:
Opening 3D Analyst, adding a Digital ...
- 1
-2
votes
1
answer
237
views
Seeking open source alternative to Spatial Analyst / 3D Analyst toolbox of ArcGIS Desktop
Is there a decent open source software alternative for the Spatial
Analyst / 3D Analyst toolboxes of the ArcGIS environment?
The main goal would be to demonstrate DEM interpolation and/or ...
- 1,186
2
votes
1
answer
743
views
Generating TIN and/or DTM from point feature data
I have parameter data that is linked to points within a polygon area. I am trying to find ways of creating an interpolated layer for the extent of the polygon within which the points are located as ...
- 611
1
vote
1
answer
1k
views
Interpolating DEM using Kriging in R [closed]
I have several DEMs as geotiff files which I load into R using raster::raster. Now some of these DEMs contain patches of missing values, represented by NA. I would like to interpolate these missing ...
- 43
1
vote
2
answers
585
views
Flattening lakes for hydro-flattened DEM using polygon vertices in QGIS
I have the vertices around lake polygons that I want to flatten for a hydro-flattened DEM. I know that ArcGIS has a trend tool that will create a sloped 'plane of best fit' for a series of points, ...
- 189
3
votes
2
answers
2k
views
How do I get accurate DTM from DSM to get tree height?
I have drone imagery which was generated in Agisoft. From the imagery a DEM was generated and exported.
I would like to know how do I get the Digital Terrain Model from this DEM? as I currently have ...
- 51
2
votes
1
answer
344
views
DEM interpolation, QGIS 3.10
A friend of mine gave me DEM resolutions of cells 5x5m, but there is something wrong with interpolation. When I try to make a cross-section of the terrain I get a pretty inaccurate cross-section, with ...
- 2,407
4
votes
1
answer
532
views
Reduce artifacts/errors in DEM
I have some roads and some points containing elevation data.
Obviously the data does not cover the whole area, as it was created by a surveyor. Based on this data, I need to check, whether the ...
- 16.5k
2
votes
0
answers
98
views
Is there a way to create a DEM that follow the point cloud so you don't need to clip the DEM after?
I would like to create a DEM from an XYZ file (gridded 0,25x0,25) with 0,25 cell. I'm wondering if there is a way so that my interpolation follows my point cloud, instead of covering a rectangle like ...
- 373
1
vote
0
answers
741
views
Creating DEM from points in QGIS? [closed]
I'm trying to make DEM from points in QGIS.
I've read all the other questions regarding the same issue and tried them all. But, none of them worked.
For example, at the end of inverse distance ...
- 61
2
votes
0
answers
250
views
Importing several LiDAR (.las) files in GRASS using v.in.lidar?
I'm building a DEM of a terrain in GRASS and have 48 LiDAR (.las) files. I know I can do this by using
r.in.lidar (including the list of files as a .txt) and then r.fillnulls
However, I want to ...
- 604
1
vote
2
answers
474
views
How do I combine these two rasters?
I have a raster representing rivers/drainage basins within a terrain:
I have a raster DEM of the terrain:
In the basin raster, everything in black is 9999. White is nodata.
The DEM is obviously a ...
- 373