I wanted to get the drainage area, but when I was doing the first step, "Level DEM", I got this error "Level DEM: Spatial reference does not have z unit" Does anyone have the same problem with this? Is there a solution to it? Is there a way to add z unit to the raster? I just ignored this error, and moved on with the following steps. Everything was fine until I got to "Sink Evaluation". It says: "Spatial reference does not have z unit. Z factor computation did not succeed. Do you want to use a factor of 1 and proceed?" I clicked yes. So it started to calculating, and after a while, an error window popped out, like this: "System. Runtime.InteropServices.COMException(0x80004005):Error HRESULT E_FAIL has been returned from a call to a COM component. at ESRI.ArcGIS. Geoprocessing. GeoProcessorClass.Execute(String Name, IVariantArray ipValues, ITrackCancel pTrackCancel) at ESRI.APWR.ApHydro.ArcHydroOp.SinkEvaluation(ApLayers apLayer, Double zuNITfactor,Int32 debug,ITtrackCancel&trackcancel, IGPMessages&messages,String&exMessage)in C:\Projects\10_Final\ArcHydroTools\src\ApHydro\ArcHydroOp.vb:line5747" does anyone know what was wrong? is there any solution? Thank you a lot!!
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