River Slope Errors

Question

Greetings.

I'm using a Geographic Coordinate System ( WGS84 ). And i've used an SRTM DEM while using the hecgeo HMS extension on ArcMap. I've got all the way to [ Characteristics ] > [ River Slope ] and it showed me this error.

I tried fixing it by adding a Z factor of 1 - Which is the default - by using [ 3D analyst ] > [ Slope ].

I named the result WatershedFactor1

This error showed up :

Would appreciate the help.

Thank you.

rcepol · Answer

I have same problem. Was it already solved? I already projected the dem and stream, but still i get error in river slope. anybody can help

DeanDjokic · Answer

Unfortunately, GeoHMS tools do not manage data in GCS.  While most tools will work with it (e.g. terrain preprocessing and subbasin delineation), once you get into calculation of stream and watershed characteristics, GCS is not supported.  There are workarounds, but you are better off projecting the DEM and starting from scratch (you cannot just project all raster derivatives).

Eng_A_SH · Answer

Hi @Anonymous User .

These are the properties of the RawDEM layer