Artifacts in Image Draping
Posted 19 January 2010 - 06:14 AM
Posted 19 January 2010 - 06:44 PM
Have you tried as a single tif file? It may mean you need to resample to get a workable file size but I found this worked for some orthos I was draping—if they were in a geodatabase they seemed to artifact along some internal tile lines. Maybe try deleting pyramids if the single tif is still showing artifacts?
Having said that it was a long time ago.
Posted 20 January 2010 - 11:56 AM
Posted 20 January 2010 - 02:32 PM
The landsat data is a tif file. Could it be that the DEM data is a courser resolution data set than the landsat data? Thats the only thing I can think of.
I'm not sure I'm afraid. I have def managed this with DEMs coarser than the image to be draped but prob not as much difference as it looks like you have.
Is the DEM also a single file or in a geodatabase?
Have you deleted the pyramids? Only reason I suggest this is 'maybe' Arc renders the tif more like a gdb if it has pyramids (as raster sources in a gdb usually have.
The other place to try would be the ESRI mapping centre—I have always got good replies from the ask a Cartographer service.
Posted 21 January 2010 - 09:40 AM
Posted 22 January 2010 - 12:49 PM
I am thinking there is something wrong with how your processed your elevation source. Instead of "draping," just apply the elevation data to the image - or float it a few meters off the ground.
co-cartographic creator of boringmaps.com
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