topic Re: still struggling to get rid of this edge effect!!!!! any simple suggestion? in ArcGIS Spatial Analyst Questions https://community.esri.com/t5/arcgis-spatial-analyst-questions/still-struggling-to-get-rid-of-this-edge-effect/m-p/1271742#M11908 <P>also how do I select to use the data within the bounds only?</P> Sun, 26 Mar 2023 14:47:21 GMT philcass2 2023-03-26T14:47:21Z still struggling to get rid of this edge effect!!!!! any simple suggestion? https://community.esri.com/t5/arcgis-spatial-analyst-questions/still-struggling-to-get-rid-of-this-edge-effect/m-p/1271737#M11905 <P>&nbsp;</P><P>This will ruin my calculations for focal statistics <span class="lia-unicode-emoji" title=":slightly_smiling_face:">🙂</span></P><P><span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="philcass2_1-1679839193920.png" style="width: 400px;"><img src="https://community.esri.com/t5/image/serverpage/image-id/66284iDCE58BB0F214AC06/image-size/medium?v=v2&amp;px=400" role="button" title="philcass2_1-1679839193920.png" alt="philcass2_1-1679839193920.png" /></span></P><P>&nbsp;</P> Sun, 26 Mar 2023 14:00:04 GMT https://community.esri.com/t5/arcgis-spatial-analyst-questions/still-struggling-to-get-rid-of-this-edge-effect/m-p/1271737#M11905 philcass2 2023-03-26T14:00:04Z Re: still struggling to get rid of this edge effect!!!!! any simple suggestion? https://community.esri.com/t5/arcgis-spatial-analyst-questions/still-struggling-to-get-rid-of-this-edge-effect/m-p/1271740#M11906 <P>The area outside the lines has to be set to nodata.&nbsp; If the lines represent the boundaries of polygons, use the data within the bounds and anything outside to nodata.</P><P>Rasters have a rectangular extent, there is no way of getting around that</P> Sun, 26 Mar 2023 14:35:50 GMT https://community.esri.com/t5/arcgis-spatial-analyst-questions/still-struggling-to-get-rid-of-this-edge-effect/m-p/1271740#M11906 DanPatterson 2023-03-26T14:35:50Z Re: still struggling to get rid of this edge effect!!!!! any simple suggestion? https://community.esri.com/t5/arcgis-spatial-analyst-questions/still-struggling-to-get-rid-of-this-edge-effect/m-p/1271741#M11907 <P><SPAN>'The area outside the lines has to be set to nodata.&nbsp; If the lines represent the boundaries of polygons, use the data within the bounds and anything outside to nodata' - how do I do this? I am using focal statistics.</SPAN></P><P><SPAN>I am using raster data. Does this mean if I keep using rasters I will not be able to get rid of the effect?</SPAN></P> Sun, 26 Mar 2023 14:40:44 GMT https://community.esri.com/t5/arcgis-spatial-analyst-questions/still-struggling-to-get-rid-of-this-edge-effect/m-p/1271741#M11907 philcass2 2023-03-26T14:40:44Z Re: still struggling to get rid of this edge effect!!!!! any simple suggestion? https://community.esri.com/t5/arcgis-spatial-analyst-questions/still-struggling-to-get-rid-of-this-edge-effect/m-p/1271742#M11908 <P>also how do I select to use the data within the bounds only?</P> Sun, 26 Mar 2023 14:47:21 GMT https://community.esri.com/t5/arcgis-spatial-analyst-questions/still-struggling-to-get-rid-of-this-edge-effect/m-p/1271742#M11908 philcass2 2023-03-26T14:47:21Z Re: still struggling to get rid of this edge effect!!!!! any simple suggestion? https://community.esri.com/t5/arcgis-spatial-analyst-questions/still-struggling-to-get-rid-of-this-edge-effect/m-p/1271743#M11909 <P>Those bounds originated from a vector file, I am pretty sure.&nbsp; If they did, get it, add a new field, call it "Dissolve", use the field calculator and calculate a value of&nbsp; &nbsp;1&nbsp; in it.&nbsp; Open up the Dissolve tool in arctoolbox and dissolve the bounds using that field.&nbsp; You will then have your area of interest I mentioned several threads ago.&nbsp; Export that to raster will set the inside to 1 and the outside to nodata.&nbsp; From that use that as your analysis mask to assign your input for focal stats to nodata.</P><P>If your focal statistics cell size was small and you were using a 3x3 window, you shouldn't see that blending that you are showing.&nbsp; So you are doing something at the focal statistics level, like not specifying a small enough cell size or you didn't preprocess your data prior to doing the focal analysis</P> Sun, 26 Mar 2023 15:20:02 GMT https://community.esri.com/t5/arcgis-spatial-analyst-questions/still-struggling-to-get-rid-of-this-edge-effect/m-p/1271743#M11909 DanPatterson 2023-03-26T15:20:02Z Re: still struggling to get rid of this edge effect!!!!! any simple suggestion? https://community.esri.com/t5/arcgis-spatial-analyst-questions/still-struggling-to-get-rid-of-this-edge-effect/m-p/1271744#M11910 <P>Thank you. I will give it a go now <span class="lia-unicode-emoji" title=":slightly_smiling_face:">🙂</span></P> Sun, 26 Mar 2023 15:22:00 GMT https://community.esri.com/t5/arcgis-spatial-analyst-questions/still-struggling-to-get-rid-of-this-edge-effect/m-p/1271744#M11910 philcass2 2023-03-26T15:22:00Z