That looks very nice. Best regards,
Tamas Scott <pub...@postholer.com> ezt írta (időpont: 2023. júl. 7., P, 21:28): > The following viewsheds were created with GDAL, one tif for every tenth > of a mile along the 2,650 mile Pacific Crest Trail. Stitched together > with ffmpeg: > > https://youtu.be/tmY27ZIVfpA > > > On 7/7/23 12:17, Tamas Szekeres wrote: > > Benoît, > > > > As far a I can understand - depending on the elevation model actually > > used - you may get different results when changing the observer and the > > target height or the observer location. I'm not sure how it would be > > different if you set the target height specifically to the observer and > > the observer height to the target height. > > > > Best regards, > > > > Tamas > > > > > > > > > > Benoît DesRochers <benoit.desroche...@usherbrooke.ca > > <mailto:benoit.desroche...@usherbrooke.ca>> ezt írta (időpont: 2023. > > júl. 7., P, 19:21): > > > > Hello there, > > > > Long story short, I'm trying to generate a viewshed for every cell > > in a raster and add them all up to get a new raster that would > > represent how many pixels can be seen from every cell. It takes a > > while, but it works! > > > > The problem is that I'm using non-default observer and target height > > values (2m observer and 0.5m target) and the results are > > significantly different when I invert them (Use the target height as > > the observer and the observer as the target height). From what I > > understand, most viewshed algorithms don't compute sightlines for > > every cell but use a reference plane instead and I'm thinking that > > might be where the problem comes from but I'm not sure. > > > > Am I doing something wrong or is that an expected outcome? > > > > Thanks, > > Benoît > > _______________________________________________ > > gdal-dev mailing list > > gdal-dev@lists.osgeo.org <mailto:gdal-dev@lists.osgeo.org> > > https://lists.osgeo.org/mailman/listinfo/gdal-dev > > <https://lists.osgeo.org/mailman/listinfo/gdal-dev> > > > > > > _______________________________________________ > > gdal-dev mailing list > > gdal-dev@lists.osgeo.org > > https://lists.osgeo.org/mailman/listinfo/gdal-dev > _______________________________________________ > gdal-dev mailing list > gdal-dev@lists.osgeo.org > https://lists.osgeo.org/mailman/listinfo/gdal-dev >
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