Latest Contributions by FaithWebster

Hello, I posted about this last week, but realized i didn't provide enough information. I need to create a Canopy Height Model. I am running ArcGIS Desktop 10.5.1. I have a "DSM" that includes man-made structures. and a DEM. The structures have to be removed from the raster for it to be a usable DSM, so I digitized the structures, turned them into a raster using "Polygon to Raster" and used a Con statement in Raster Calculator. This made an output of raster with the shape of the digitized polygons, and the values of the DEM.  I then mosaiced the DSM into the structures raster layer. I used the appropriate mosaic operator so that the structure raster values stayed put. So, hypothetically I would has a DSM with no man-made structures as the output. It looks right visually.  I then used Raster Calculator to Subtract the DEM from the DSM (DSM - DEM) to get a CHM (relative height of trees). the output raster has a bunch of values from -23 to 0... both where the structures are and elsewhere. In theory, there should be nothing lower than 0.  The DSM and the DEM are both 3 ft resolution from the same lidar flight. Does anyone have any ideas what may have gone wrong, or what I can do to fix it?  I symbolized the problem values in red. this image has 3 structures. and if it were just the structures, I would know I did the raster calculator wrong, or something like that. but because there are so many other errant values throughout, I'm perplexed.    Thank you!!  ... View more

Hello my friendly GeoNet community!  I need to create a Canopy Height Model. I have a "DSM" that includes man-made structures. and a DEM. I digitized the structures, turned them into a raster and used a Con in Raster Calculator to create a raster layer of just the DEM values, and then mosaiced the DSM into the structures raster layer. So, hypothetically I would has a DSM with no man-made structures. I then used Raster Calculator to Subtract the DEM from the DSM (DSM - DEM) to get a CHM. the result has a bunch of values from -23 to 0... the DSM and the DEM are both 3 ft resolution from the same lidar flight. Does anyone have any ideas what may have gone wrong, or what I can do to fix it?  Thank you!!  ... View more

I have a peculiar problem. The clip tool is simply not running. My results say that the tool ran, but the output isn't created, and there are no messages.  I have moved all the data into the same geodatabase, and it's all in the same projection. I welcome any suggestions to what could be going on because I am at a loss.  Thank you GeoNet Community!  ... View more

I am running 10.5.1 on a windows 10 machine. Every time I want to navigate to a folder from an arcgis tool, in map or catalog, I get this error message: . I'm sure you can imagine, this is endlessly frustrating. Can Someone please help me figure out how to make this error message go away?  Thank you!  ... View more