Then, if I run DEM Reconditioning through HEC-GeoHMS with the project raster layer as the Input Raw DEM, I get the same error as originally. Since the professor wanted to run HEC-GeoHMS DEM reconditioning, I ran project raster on the base map to satisfy the error message.
I attempted to run DEM reconditioning with nothing but the base map and flowline data and HEC-GeoHMS says "Please add data with appropriate projection to the map, save and try again." Running it with Arc Hydro Tools does not produce this error, and instead runs DEM Reconditioning successfully. Thanks for getting back to me, and sorry for the delay. This tells me that the flow lines are likely manually created or are out of date (ie. The drainage lines do not always follow the NHDFlowlines. I do burn in pipes especially in the flat lands.Īttached you can see a version of the DEM with the streams burned in (reconditioned) with the drainage lines from the non-reconditioned (non-burned) DEM. One thing I do is ignore streams and rely on the DEM to define the streams except when there is a problem area like a bridge or embankment that the DEM "doesn't know about". When I "mixed" the versions, I would run into problems. I had problems in the past with versions of HEC-GeoHMS and ArcHydro not being based on the same version. So, your finding conflicts with mine and I'll have to keep a heads up. Everything worked fine.Īs for having the flowline date in a geodatabase, I've always found geodatabases to be more stable and my practice it to put the data in a geodatabase as a matter of course. I also ran my typical process on the original DEM (not reconditioned) fill sinks-flow direction-flow accumulation-stream definition-stream links-catchment grid delineation-catchment poly processing-drainage lines. I ran the reconditioning and it worked fine.
I downloaded your data and went straight to DEM reconditioning and had now problems.
0 kommentar(er)
