I am using ArcGIS 10.6 and HEC-GeoRas 10.6. I need to create a GIS project; first I run my steady simulation in HEC RAS, exported all data from HEC-RAS and then exit the program. Next, in ArcGIS with GeoRAS I convert SDF to XML file, set up my layer, create the new analysis and do a water surface generation, all good without problems. Finally, when I choose: "Floodplain delineation using rasters" I get this error:
System.Runtime.InteropServices.COMException(0x80041098):ERROR 010151: No features found in C:\........\Steady_PF\fdtemp.shp. Possible empty feature class.
at ESRI.ArcGIS.GeoAnalyst.RasterConversionOpClass.RasterDataToPolygonFeatureData(IGeoDataset dataset, IWorkspace pWorkspace, String name, Boolean weeding)
at HECGeoRAS.clsMFloodGRIDIntersection.GridToPolygon1(IRaster pRaster, IGeoDataset pGeoIn, IWorkspace pWS, String sName, Boolean sWeeding)
I can't solve it, can somebody help me please?
Thank you so much!
Looks like you got your cross sections to come into ArcGIS. Make a TIN using your cross sections as a contour data type and the water surface elevation field as the elevation source. Convert the output TIN to a raster with the same cell size as your DEM. Looks like your DEM might also be a TIN. If so, convert this to a raster as well. Use the Minus tool in Spatial Analyst to get the difference, which will also be a raster. Create a contour using Contour List at an elevation of zero. This line indicates where the terrain elevation is equal to the water surface elevation. It also represents the floodplain boundary as a line. If you connect the endpoints of this line to make a closed polygon, you can then convert it to a floodplain polygon and edit it accordingly.
You can put this into Model Builder to help you automate the process for future iterations.
Hope this helps,