topic Weighted Flow Accumulation Issue in ArcGIS Spatial Analyst Questions https://community.esri.com/t5/arcgis-spatial-analyst-questions/weighted-flow-accumulation-issue/m-p/102555#M1418 <HTML><HEAD></HEAD><BODY><SPAN>I have run into a snag trying to get a weighted flow accumulation to work.&nbsp; I am working with data that is of relatively low resolution (50m) over an area that is approximately 10km x 25km.&nbsp; I have made sure that the data is in the same coordinate system at the same resolution and the pixels are perfectly aligned.&nbsp; However, when I run it, it just says "Updating Flow Accumulation" for hours. I have run it overnight and it has not changed.&nbsp; When I try to cancel it the program stops responding and I have to restart ArcGIS. I also tried this on a different computer. </SPAN><BR /><BR /><SPAN>What can I do to get it to work and are there any programs that will do a weighted flow accumulation with a more advanced algorithm then the D8?&nbsp; Thanks.</SPAN></BODY></HTML> Thu, 16 Sep 2010 16:54:27 GMT BrianPeacock 2010-09-16T16:54:27Z Weighted Flow Accumulation Issue https://community.esri.com/t5/arcgis-spatial-analyst-questions/weighted-flow-accumulation-issue/m-p/102555#M1418 <HTML><HEAD></HEAD><BODY><SPAN>I have run into a snag trying to get a weighted flow accumulation to work.&nbsp; I am working with data that is of relatively low resolution (50m) over an area that is approximately 10km x 25km.&nbsp; I have made sure that the data is in the same coordinate system at the same resolution and the pixels are perfectly aligned.&nbsp; However, when I run it, it just says "Updating Flow Accumulation" for hours. I have run it overnight and it has not changed.&nbsp; When I try to cancel it the program stops responding and I have to restart ArcGIS. I also tried this on a different computer. </SPAN><BR /><BR /><SPAN>What can I do to get it to work and are there any programs that will do a weighted flow accumulation with a more advanced algorithm then the D8?&nbsp; Thanks.</SPAN></BODY></HTML> Thu, 16 Sep 2010 16:54:27 GMT https://community.esri.com/t5/arcgis-spatial-analyst-questions/weighted-flow-accumulation-issue/m-p/102555#M1418 BrianPeacock 2010-09-16T16:54:27Z Re: Weighted Flow Accumulation Issue https://community.esri.com/t5/arcgis-spatial-analyst-questions/weighted-flow-accumulation-issue/m-p/102556#M1419 <HTML><HEAD></HEAD><BODY><SPAN>Try TauDEM.</SPAN></BODY></HTML> Wed, 10 Nov 2010 21:39:21 GMT https://community.esri.com/t5/arcgis-spatial-analyst-questions/weighted-flow-accumulation-issue/m-p/102556#M1419 AlisaWade 2010-11-10T21:39:21Z