I am working on a project that is modeling runoff at a county level. The DEM used is lidar derived and has a 5 ft resolution. The general workflow I am flowing is
- Sink evaluation
- Sink Selection (to give a minimum drainage area)
- Fill sinks (using the deranged polygon from the sink evaluation and the 'Use IsSink field' option).
When I run the fill sinks tool I receive the following error:
System.Runtime.InteropServices.COMException (0x80041098): ERROR 010429: Error in GRID IO: MtVatBldNew: Value range for c:\users\user\appdata\local\temp\arcc79c\ah2014~4\tmp2675 exceeds 100000 . ERROR 010429: Error in GRID IO: and number of unique values exceeds 500 .. ERROR 010236: Error in building VAT. ERROR 010067: Error in executing grid expression. at ESRI.ArcGIS.GeoAnalyst.RasterConversionOpClass.ToRasterDataset(IGeoDataset dataset, String rasterFormat, IWorkspace pWorkspace, String name) at ESRI.APWR.ApHydro.ArcHydroOp.FillSinks(ApLayers& aplayers, Boolean useIsSink, Boolean fillAll, Double fillLimit, ITrackCancel trackCancel, IGPMessage messages, String& exMessage) in C:\Builds\HydroSolutions\10.1_ArcHydro\Sources\ArcHydroTools\src\ApHydro\ArcHydroOp.vb:line 57592 Failed to execute (FillSinks).
I thought this was telling me that the DEM was too large in size, so I tried running the tool again with several subsets by using a polygon to determine the processing extent. This results in the same error and I am not sure why. I have tried the usual fixes (deleting temp files, checking output locations, using the toolbox vs. the toolbar) and the error still occurs.
In order to get the DEM to a smaller size, it was converted from float to integer so I thought the VAT error pertained to that. I reran the tools using the float based DEM and received the same error.
I have also tried using small subsets of the raster to see if that is the problem, and I have the same error.
Can anyone offer insight on this or help me figure out what I am doing wrong?