Creating a bare earth (DTM) tif file
gilesg
Posts: 4
in Raster Data
Hi there,
I imported a .las file from generated by photogrammetry. I chose the Binning option to create a bare earth surface.
Looking at the generated grid, it looks good and has excluded most of the vegetation - I'm interested in the topograpghy of the river bed so the vegetation shown on the banks is not a problem.
Then when I export the grid as a tif and open it up in other software it has a zig zag profile in cross section so it useless to me.
I've tried all the different export settings and no luck.
Any ideas?
I imported a .las file from generated by photogrammetry. I chose the Binning option to create a bare earth surface.
Looking at the generated grid, it looks good and has excluded most of the vegetation - I'm interested in the topograpghy of the river bed so the vegetation shown on the banks is not a problem.
Then when I export the grid as a tif and open it up in other software it has a zig zag profile in cross section so it useless to me.
I've tried all the different export settings and no luck.
Any ideas?
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Answers
I'm not sure what you mean by a "zig-zag profile". Could you post a screen capture of the data?
Also, when you export a grid to GeoTIFF, be sure to select the option to export 32-bit floating point pixels, especially if you are using units in the range of feet or meters.
Cheers,
Bob