topic Re: LAS dataset to Raster issues in LIDAR Resources Questions

LAS dataset to Raster issues

EllaKasten — Mon, 26 Oct 2020 18:53:15 GMT

I am working with downloaded USGS/VGIN LIDAR which I can convert to LAS and build a LAS dataset from; however, I can not convert to Raster. All other processes are working (I can create a scene, add contour, identify outliers, etc...) but LAS dataset to Raster gives me this error:

Any ideas why this is not working?

Re: LAS dataset to Raster issues

DanielMichel — Tue, 03 Nov 2020 18:39:34 GMT

Saving the output to a different location (such as the C: drive, assuming you are currently saving elsewhere) sometimes remedies that error.

Re: LAS dataset to Raster issues

amann — Fri, 13 Nov 2020 15:52:53 GMT

Do you need to write the output file to a folder or can the output be set to the project geodatabase? If you need to write to a folder, what file extension are you using?

Re: LAS dataset to Raster issues

EllaKasten — Thu, 19 Nov 2020 15:41:07 GMT

I have found that if I go to properties --> LAS Filter for the LAS dataset and check Withheld and Overlap I can create Rasters with no problems. Does this change anything in my output Raster? Is this a good fix?

Re: LAS dataset to Raster issues

ArthurCrawford01 — Mon, 03 Jun 2024 20:51:52 GMT

Having the overlap turned on would cause more density in areas, it's usually turned off for processing and not needed. You should also turn off Low Noise and High Noise as these are errors in the data (bird flying over or something like that). It sounds like you are creating a DSM, that shows the heights of things. If you are looking for building heights, I would run the Classify LAS Building tool and the do a selection of just the building, ground and water. If you want to include the trees and other points, run with the noise and overlap turned off. Use the LAS Dataset to Raster, I tested this and it worked with this VGIN tile: USGS_LPC_VA_West_Chesapeake_Bay_Watershed_Lidar_2017_B17_LAS_17SPB150490.laz, be sure to use Convert LAS to get it into LAS format first (turn rearrange option off).