topic how to get slope in x and y directions in ArcGIS Spatial Analyst Questions https://community.esri.com/t5/arcgis-spatial-analyst-questions/how-to-get-slope-in-x-and-y-directions/m-p/55598#M759 <HTML><HEAD></HEAD><BODY><SPAN>Dear All,</SPAN><BR /><BR /><SPAN>How can I be able to generate the slope of a raster file (dem). I need here two types of slopes: the slope in the x-direction, and the slope in the y-direction of the same dem raster file.</SPAN><BR /><BR /><SPAN>Thanks</SPAN></BODY></HTML> Fri, 14 Jan 2011 08:07:58 GMT TaiseerHarb 2011-01-14T08:07:58Z how to get slope in x and y directions https://community.esri.com/t5/arcgis-spatial-analyst-questions/how-to-get-slope-in-x-and-y-directions/m-p/55598#M759 <HTML><HEAD></HEAD><BODY><SPAN>Dear All,</SPAN><BR /><BR /><SPAN>How can I be able to generate the slope of a raster file (dem). I need here two types of slopes: the slope in the x-direction, and the slope in the y-direction of the same dem raster file.</SPAN><BR /><BR /><SPAN>Thanks</SPAN></BODY></HTML> Fri, 14 Jan 2011 08:07:58 GMT https://community.esri.com/t5/arcgis-spatial-analyst-questions/how-to-get-slope-in-x-and-y-directions/m-p/55598#M759 TaiseerHarb 2011-01-14T08:07:58Z Re: how to get slope in x and y directions https://community.esri.com/t5/arcgis-spatial-analyst-questions/how-to-get-slope-in-x-and-y-directions/m-p/55599#M760 <HTML><HEAD></HEAD><BODY><SPAN>Seems to me the best approach would be calculate aspect and slope, and then build a map algebra expression (using basic sin/cos trigonometry) to separate the slope in to X and Y components using the aspect.</SPAN><BR /><BR /><SPAN>I would be very careful as to which coordinate system you use so the X and Y will "make sense" (for example so "north" will be "up").</SPAN><BR /><BR /><SPAN>Does this help?</SPAN></BODY></HTML> Fri, 14 Jan 2011 13:20:39 GMT https://community.esri.com/t5/arcgis-spatial-analyst-questions/how-to-get-slope-in-x-and-y-directions/m-p/55599#M760 curtvprice 2011-01-14T13:20:39Z Re: how to get slope in x and y directions https://community.esri.com/t5/arcgis-spatial-analyst-questions/how-to-get-slope-in-x-and-y-directions/m-p/55600#M761 <HTML><HEAD></HEAD><BODY><SPAN>An excellent discussion on slope issues was recently posted by Bill Huber in this thread</SPAN><BR /><A href="http://forums.arcgis.com/threads/20607-Need-help-with-slope-algorithms-for-my-internship">http://forums.arcgis.com/threads/20607-Need-help-with-slope-algorithms-for-my-internship</A></BODY></HTML> Fri, 14 Jan 2011 13:49:53 GMT https://community.esri.com/t5/arcgis-spatial-analyst-questions/how-to-get-slope-in-x-and-y-directions/m-p/55600#M761 DanPatterson_Retired 2011-01-14T13:49:53Z