Does anyone know of any tool available that would allow the user to delineate the location of levees from a LiDAR DEM or of any methodology that has worked for a user trying to do this? I have a LiDAR DEM that is 1 meter resolution and I am trying to identify the locations of levees within it. I know from create profile lines that there are some levees potentially present. Are there any commercial tools or programs that people have used to identify the locations of levees? I do not have any experience in this area so I am trying to find out as much as I can. Any information would be good. Thanks.
I know there are people working on developing such processes and software, but I dont know if any of them have released anything yet. One way that I found that works decently well is "3dAnalyst->Raster Surface->Slope " calculating for degrees. Set the resulting raster file to have the symbology of 16-22degrees(approximately 3:1 slope) and 22-45degrees(roughly 2:1 to 1:1). The attached image is the result of this process showing a levee identified from a DEM with 3ft resolution. Its not perfect by any means, but using the above symbology its fairly easy to pick out man made structures vs natural terrain(large red splotch is tributary channel).
I know there are people working on developing such processes and software, but I dont know if any of them have released anything yet. One way that I found that works decently well is "3dAnalyst->Raster Surface->Slope " calculating for degrees. Set the resulting raster file to have the symbology of 16-22degrees(approximately 3:1 slope) and 22-45degrees(roughly 2:1 to 1:1). The attached image is the result of this process showing a levee identified from a DEM with 3ft resolution. Its not perfect by any means, but using the above symbology its fairly easy to pick out man made structures vs natural terrain(large red splotch is tributary channel).
Thanks for your reply. After I had posted my question I ended up using the process you specified just to see if it would work. It is a rough estimate but it seems to do the job. Thank you for suggesting the symbology representation scheme. That made it much easier to view the data. Like you said it is not perfect but for now I think it will work. Thanks again for your advice. It was greatly appreciated.
