topic Hecgeo-HMS Error in Water Resources Questions

Hecgeo-HMS Error

Eng_A_SH — Fri, 02 Jul 2021 13:52:51 GMT

Hello.

This error appears when I use Preprocessing > AdjointCatchment Processing.

The original DEM is in a Geographic coordinate system.

Please advise.

Re: Hecgeo-HMS Error

DeanDjokic — Fri, 02 Jul 2021 15:45:15 GMT

Please provide more detail. Which version of ArcMap and GeoHMS are you using? Did all previous steps complete correctly? Did you try to use Arc Hydro tools for preprocessing (instead of GeoHMS)? Also, while the initial tools (terrain preprocessing) should work on DEM geographic CS, that does not work for what follows (calculating areas and lengths). So my advice is to project the DEM first into meaningful local PCS and then do the rest of preprocessing on that DEM. And make sure you start a new project once you project the DEM and do all the preprocessing in that new project to avoid any potential "leftover" issues with changing projections.

Re: Hecgeo-HMS Error

Eng_A_SH — Sat, 03 Jul 2021 19:00:58 GMT

Hello. I have ArcMap 10.8.1 and Hec HMS 4.0 . Don't know if that means hecgeo-HMS is 4.0 as well.
I've tried projecting the original DEM into a local Projected coordinate system and then starting from scratch. It lead to the same error, with all the previous steps successfully done.

As for the ArcHydro tool. Using it also lead to the same error message.

Re: Hecgeo-HMS Error

DeanDjokic — Mon, 05 Jul 2021 02:05:24 GMT

I have rerun the full set of preprocessing functions in HEC-GeoHMS using the latest installs for Arc Hydro and HEC-GeoHMS for ArcGIS 10.8.1 and they completed successfully. I suggest that you reinstall Arc Hydro and HEC-GeoHMS. Please follow this process (in this specific order): uninstall HEC-GeoHMS (and HEC-GeoRAS if installed), and then Arc Hydro. Download the latest versions for 10.8.1 from the download ftp site (http://downloads.esri.com/archydro/😞 of Arc Hydro (10.8.0.34), HEC-GeoHMS (10.8.0.10) (and if needed HECGeoRAS - 10.8.0.3). Install them in that order. Start a new project and try again.

Re: Hecgeo-HMS Error

Eng_A_SH — Wed, 14 Jul 2021 23:24:18 GMT

I've changed my laptop's drive to an SSD. Which meant I had to start from scratch and install these programs. I did so using the exact order that you mentioned.
This time I used a Geographic Coordinate System ( WGS84) and the operation went smoothly and the error did not appear.
I apologize for changing more than one factor, which led to the inability of pinpointing the origin of the issue, whether it was faulty programs or the use of a Projected Coordinate System ( JTM ) .
In the end, it did work out. Thank you.