Watershed Aspect - Problems with Raster Calculator

Discussion created by btrushel on Jun 25, 2010
Latest reply on Jun 28, 2010 by btrushel
Hi All,

I am trying to A) determine the mean aspect for a watershed and B) determine the mean aspect for the stream network in that watershed.  I have tried both determining the aspect from the DEM/NHD and then clipping the raster to the watershed/stream and I have tried clipping the DEM/NHD first and then determining the aspect.  When I attempt to clip a raster and then use the raster calculator, ArcMap entirely shuts down and a "Send Error Report" box pops up.  This happens after I attempt to recalculate the new raster.  Any ideas why this maybe happening and a solution around this?  Many thanks in advance.