Hello, I have a problem with clipping a raster, first of all, I had LIDAR files in .asc format, I created a point cloud shapefile out of it and try to interpolate the shape to have an elevation raster. That's where my problem is : - I first used Natural Neighbor tool, the raster was fine but as the point cloud is concave, ArcGIS filled the concavities where it should have let them empty. - I then created a polygon following the shape of the point cloud in order to run a clipping process, but after the clip done, the output raster was really pixelated. (I also tried the Extract by Mask tool, same problem) - Finally I tried an interpolation by Spline using Spline with Barriers tool choosing my polygon feature as extent but after one hour and eleven minutes of processing (indeed, 3 000 000 points cannot be interpolated in a minute) it crashed...
Here I come trying to avoid nervous breakdown or burning down my computer, hoping that you're gonna come out with a brilliant idea. I'm just looking for a decent interpolation of a concave point cloud. Thanks in advance, Take care,
Joss
Edit : Here are two pictures of : first, the raster before clipping, interpolated using Natural Neighbor, second, the raster clipped using the polygon created from the point cloud.
Many tools use a custom renderer. Natural Neighbor will use one for the colors and will use a "nearest neighbor" resampling for display. ExtractByMask does not use a custom renderer. Therefore, right click on ExtractByMask output raster layer in your TOC and choose Properties... and change as shown below
Many tools use a custom renderer. Natural Neighbor will use one for the colors and will use a "nearest neighbor" resampling for display. ExtractByMask does not use a custom renderer. Therefore, right click on ExtractByMask output raster layer in your TOC and choose Properties... and change as shown below