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Hi, yes I should have provided more information for my post to be useful. We do species identification at the individual tree level using ALS. We use raster CHM in our segementation software to delineate individual crowns. In order to minimize edge effects (crowns being chopped in two at the edge and being assigned two different ID's) we use a 20m buffer (this is customizable in our software) on each raster tile. For small areas (like Petawawa Research Forest in Ontario, Canada ((100 sq. km.)) I use unbuffered las tiles (made with Tile LAS tool), create LAS dataset->las dataset to raster (25cm resolution DTM, DSM)->raster calculator for CHM (DTM-DSM), split raster with 20m overlap. This works very well. We have other areas that are several thousand square kilometers in size (LAS dataset has 1800 tiles of 1 sq.km each for example) where ArcGIS Pro has no problem displaying the LAS data but creating a 25cm raster and then tiling it as above with the overlap takes a very long time. Whereas tiling LAS with an overlap and then creating the raster from the tiles is much easier and efficient for us. Hope this is clear. Thank you for your reply.
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05-19-2018
10:35 AM
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IDEA
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Hello, Would be great if the Tile LAS tool had an overlap setting like the Split Raster tool has. I am a simple man so this is a simple request!
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05-18-2018
12:44 PM
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Hello, I have successfully used Extract LAS to clip a las dataset to my study area using a polygon shapefile, the resulting las files having the _clipped suffix I specified. I have a shapefile with thousands of tree crowns that were extracted using our in lab software. We use FUSION and extract all the points from each tree crown (like a cookie cutter) into their own individual las file eg. each tree from each crown polygon has a las file, with the tree_id from the shapefile as the suffix. Is there a way to do this in ArcGIS Pro using the lidar tools, or use model builder/Python somehow to iterate through the shapefile, extracting each tree crown's las points falling under the crown polygon and naming a suffix with the treeid for the resulting LAS file. Many thanks, trying to reduce the number of tools we use, we could also use lasclip which works well.
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11-21-2016
10:26 AM
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Title | Kudos | Posted |
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1 | 05-18-2018 12:44 PM |
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