topic Re: How to select a continuous area with raster in LIDAR Resources Questions https://community.esri.com/t5/lidar-resources-questions/how-to-select-a-continuous-area-with-raster/m-p/866058#M146 <HTML><HEAD></HEAD><BODY><P><A href="http://desktop.arcgis.com/en/arcmap/latest/tools/spatial-analyst-toolbox/focal-statistics.htm">focal statistics with range and variety</A>as options and perhaps a directionally specific neighborhood may work if you intent is to pull out the roads.&nbsp; But the easiest would be to simply limit your area of analysis to the area that you are interested in</P></BODY></HTML> Wed, 22 Mar 2017 23:49:36 GMT DanPatterson_Retired 2017-03-22T23:49:36Z How to select a continuous area with raster https://community.esri.com/t5/lidar-resources-questions/how-to-select-a-continuous-area-with-raster/m-p/866057#M145 <HTML><HEAD></HEAD><BODY><P>Hi all, &nbsp;</P><P></P><P>I have created a slope raster from a DEM and am trying to select only contiguous areas of slope less than 10 degrees. I have used the raster calculator to select that subset of slopes, but I only want to include areas that are contiguous (i.e. &nbsp; no gaps between pixels, as seen in the one linear raster area below, which is a road). I would also like to rule out areas of the slope raster that &nbsp;have significant pockets of slope that's steeper than 10 degrees (as seen in the blobs on both sides of the road).<BR /><BR />Is there a focal or zonal function that can do this?<BR /><BR /></P><P><IMG class="image-1 jive-image" src="https://community.esri.com/legacyfs/online/343617_pastedImage_1.png" style="width: 620px; height: 608px;" /></P></BODY></HTML> Wed, 22 Mar 2017 22:09:45 GMT https://community.esri.com/t5/lidar-resources-questions/how-to-select-a-continuous-area-with-raster/m-p/866057#M145 GregoryAmos 2017-03-22T22:09:45Z Re: How to select a continuous area with raster https://community.esri.com/t5/lidar-resources-questions/how-to-select-a-continuous-area-with-raster/m-p/866058#M146 <HTML><HEAD></HEAD><BODY><P><A href="http://desktop.arcgis.com/en/arcmap/latest/tools/spatial-analyst-toolbox/focal-statistics.htm">focal statistics with range and variety</A>as options and perhaps a directionally specific neighborhood may work if you intent is to pull out the roads.&nbsp; But the easiest would be to simply limit your area of analysis to the area that you are interested in</P></BODY></HTML> Wed, 22 Mar 2017 23:49:36 GMT https://community.esri.com/t5/lidar-resources-questions/how-to-select-a-continuous-area-with-raster/m-p/866058#M146 DanPatterson_Retired 2017-03-22T23:49:36Z