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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shadow simulation from buildings [duplicate]
is it possible to use hillshade function in ArcMap to calculate shadow areas of buildings or simulate shadows of buildings, using DSM of the buildings and the sun angle and azimuth?
- 57
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Comparing two Digital Elevation Models (DEMs) from LAS files? [closed]
I have two LiDAR files (.las), one is original let's say with X points. And the other is copy of the first .las file but with Y points, where Y is less than X.
Now, I want to compare the Digital ...
jkl
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answer
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USGS DEM Easting and Northing metric and unit
I have to do some programming work with DEM files.
I got some DEM files from http://geobase.ca/geobase/en/find.do?produit=cded the 1:50,000 version and read in the data. According to the DEM ...
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Converting XYZ files (with regularly spaced xy) to ESRI GRID format?
Normally consultants (LiDAR survey) provide me with data to my specifications; already in ESRI GRID or ASCII GRID format. This way LiDAR data can be easily used with ArcGIS. This time I only have xyz ...
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Calculating elevation profile along line from a DEM?
Given a DEM (Digital Elevation Model) and a line (x1,y1) --> (x2,y2) (paired coordinates (x,y)), how can one calculate the elevation profile or cross-section projected on that line?
I am looking for ...
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Downloading 1 arc-second elevation data for Canada other than Geobase?
Can someone suggest a source for Canadian elevation data better or equivalent to 1 arc-second?
I have a good data source for Ontario but for other provinces folks often recommend Geobase which claims ...
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Merging DEMs or other raster datasets and clipping Raster dataset to vector line?
I have two DEMs that I am going create a hillshade from, and ultimately want one hillshade clipped to a county boundary. I am running into a couple problems, though.
When I try to merge the two ...
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Converting DEM into areas of "flatness", with arbitrary fill/cut to area ratio? [closed]
I want to find areas of relative "flatness" in a DEM.
How can I find flat areas?
I want to find a neighbourhood of contiguous cells that have an elevation variance that is within a certain ...
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Are there any open source tools to detect and fill sinks on a DEM? [closed]
Are there any open source or inexpensive tools to detect and fill sinks on a DEM? ArcGIS Spatial Analyst is just out of my price range.
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