https://community.esri.com/t5/arcgis-pro-questions/help-i-need-to-consider-edge-effects-when-creating/m-p/1269650#M66916 <P>Hello - I am very new to ARCMAP and the learning curve is steep!</P><P>I am trying to create a tool in ARCMAP for focal statistics. I am struggling how to consider possible edge effects and make sure the compactness is correctly calculated for pixels near the boundary of the study area.&nbsp;</P><P><span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="philcass2_0-1679346003729.png" style="width: 400px;"><img src="https://community.esri.com/t5/image/serverpage/image-id/65752i957791CCB416B978/image-size/medium?v=v2&amp;px=400" role="button" title="philcass2_0-1679346003729.png" alt="philcass2_0-1679346003729.png" /></span></P><P>&nbsp;</P><P>Does anyone know of a way to do this?</P> Mon, 20 Mar 2023 21:01:03 GMT philcass2 2023-03-20T21:01:03Z https://community.esri.com/t5/arcgis-pro-questions/help-i-need-to-consider-edge-effects-when-creating/m-p/1269650#M66916 <P>Hello - I am very new to ARCMAP and the learning curve is steep!</P><P>I am trying to create a tool in ARCMAP for focal statistics. I am struggling how to consider possible edge effects and make sure the compactness is correctly calculated for pixels near the boundary of the study area.&nbsp;</P><P><span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="philcass2_0-1679346003729.png" style="width: 400px;"><img src="https://community.esri.com/t5/image/serverpage/image-id/65752i957791CCB416B978/image-size/medium?v=v2&amp;px=400" role="button" title="philcass2_0-1679346003729.png" alt="philcass2_0-1679346003729.png" /></span></P><P>&nbsp;</P><P>Does anyone know of a way to do this?</P> Mon, 20 Mar 2023 21:01:03 GMT https://community.esri.com/t5/arcgis-pro-questions/help-i-need-to-consider-edge-effects-when-creating/m-p/1269650#M66916 philcass2 2023-03-20T21:01:03Z https://community.esri.com/t5/arcgis-pro-questions/help-i-need-to-consider-edge-effects-when-creating/m-p/1269652#M66917 <P>This applies whether arcmap or Pro</P><P><A href="https://pro.arcgis.com/en/pro-app/latest/tool-reference/spatial-analyst/how-focal-statistics-works.htm" target="_blank">How Focal Statistics works—ArcGIS Pro | Documentation</A></P><P>So if you don't like the way edge effects are handled, then you have two other possible options</P><UL><LI>enlarge the area being studies beyond your current area of interest, then clip the focal statistics results after</LI><LI>keep your area of interest and clip the focal statistics results to an area smaller than that influenced by edges</LI></UL> Mon, 20 Mar 2023 21:07:35 GMT https://community.esri.com/t5/arcgis-pro-questions/help-i-need-to-consider-edge-effects-when-creating/m-p/1269652#M66917 DanPatterson 2023-03-20T21:07:35Z https://community.esri.com/t5/arcgis-pro-questions/help-i-need-to-consider-edge-effects-when-creating/m-p/1269655#M66918 <P>Thank you for you're reply!!!!!!!! <span class="lia-unicode-emoji" title=":slightly_smiling_face:">🙂</span></P><P>"enlarge the area being studies beyond your current area of interest, then clip the focal statistics results after"</P><P>are there any decent steps or tutorials that can help?</P> Mon, 20 Mar 2023 21:12:38 GMT https://community.esri.com/t5/arcgis-pro-questions/help-i-need-to-consider-edge-effects-when-creating/m-p/1269655#M66918 philcass2 2023-03-20T21:12:38Z https://community.esri.com/t5/arcgis-pro-questions/help-i-need-to-consider-edge-effects-when-creating/m-p/1269717#M66931 <P><A href="https://pro.arcgis.com/en/pro-app/latest/tool-reference/analysis/clip.htm" target="_blank">Clip (Analysis)—ArcGIS Pro | Documentation</A>&nbsp; for vector geometry (eg polygons)</P><P><A href="https://pro.arcgis.com/en/pro-app/latest/tool-reference/data-management/clip.htm" target="_blank">Clip Raster (Data Management)—ArcGIS Pro | Documentation</A>&nbsp;for rasters</P><P>is all you need.&nbsp; If you start with vector, clip the source to a larger area, run focal statistics, then clip raster to remove a desired amount from around the edges.</P><P>If you have raster only, the clip raster for both.</P><P>If you don't have any more area other than what is shown, you omit using a larger input area, and just trim the focal statistics result with clip raster.</P><P>In short, the edge effects are generally well handled and well accepted so you may be making unnecessary extra work for yourself</P> Tue, 21 Mar 2023 02:03:03 GMT https://community.esri.com/t5/arcgis-pro-questions/help-i-need-to-consider-edge-effects-when-creating/m-p/1269717#M66931 DanPatterson 2023-03-21T02:03:03Z