10
votes
Extract raster value at each vertex from line, while keeping the line
You can use "Drape (set Z value from raster)" tool to set the z value of every vertex in the densified line to a value sampled from a raster.
- 69.9k
9
votes
Accepted
Extract raster value at each vertex from line, while keeping the line
Using QGIS expressions, use this expression:
raster_value( 'DEM', 1, start_point($geometry))
This is to get the elevation from the raster called DEM, raster band 1 for the line's start point. To get ...
- 55.3k
4
votes
Accepted
rasterstats zonal_stats - return cell position
You can grab the indices of the mini raster where the pixel value == the statistic value (i.e min or max) using numpy.argwhere, then use the transform/affine to work out the map coordinates.
e.g.
from ...
- 58.7k
3
votes
How do you interpret a DEM?
A DEM is to my understanding usually created from the interpolation from other data sources, typically point elevations and\or contour lines, the pixel being assigned an elevation value. When I use a ...
- 41.2k
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