Hi Issac, I'd need to get some more specifics on what about the vegetation you are trying to classify or cluster together. And I assume that by "solid 3D model," you essentially mean stitching together the LAS points to create surfaces that connect each point. That is something I've never heard of being done for vegetation and is probably unrealistic for any sort of densely vegetated areas. Extremely dense UAV collected point clouds could make it more plausible, but understory vegetation is notoriously difficult to characterize, let alone represent as a surface. The primary OBIA that is performed with lidar data is tree segmentation. That is, identifying individual trees or "tree approximate objects" (TAO) from a canopy height raster or directly from the point cloud. We say TAO because it is extremely difficult to accurately delineate tree crowns, particularly in dense forests, which means that some of those segments will actually represent 2 or 3 crowns. Cheers, Eric
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I have a LAS file that has high noise (e.g., birds) classified as class 18. This class is apparent when viewing in FUSION. But when I convert the LAS to LASD and inspect the data in ArcMap, the points classified as 18 are simply not there. These points are erroneously high (e.g., 70m to 140m high in a southern Utah environment), and should stand out clearly in the LASD data whether symbolized by class or elevation. Is LASD automatically excluding ASPRS classes 7 and 18 (noise and high noise)?
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