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I was not sure what re-sampling my team member used. I'm sure he used nearest neighbor just because we where having trouble with the size. I tried to run both cubic and bi linear and I got the same patterns but not in the same locations......
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03-22-2018
09:39 PM
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Yes they stay visible throughout. Which leads me to believe there must be a error in the data, because rendering issues would remedy itself at large scales (Maybe I dunno). I will try and give the pyramids a shot! thanks
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03-22-2018
09:11 PM
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We actually got the lines in the original interpolation and then re-sampled to try and eliminate them. We don't actually know what other pre-processing was done... the DEM was given to us from an outside organization. (I wish that this was a given assignment because then my prof. could help. we are doing a final research project on modeling changes in stream flow post fire to measure the effect on current infrastructure.)
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03-22-2018
09:08 PM
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for a school group project we were given a pre processed DEM built from lidar point cloud. We have had tons of issues with the DEM (.tiff) due to the size of the file but have been able to run the tools by cutting out the required data and re-sampling call size to 5m. After running fill sinks and flow direction the data shows a uniform grid that was undetectable in the DEM and Slope calculations. I am curious if anyone has dealt with this before, or have any idea if this could come from some rendering issues with the large data, or if there is some kind of error in the data. (The project is research based. I'm not just looking for easy answers for a lab assignment) Thanks!
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03-22-2018
01:04 AM
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