topic Re: Hot Spot Analysis and IDW Raster question in Spatial Statistics Questions https://community.esri.com/t5/spatial-statistics-questions/hot-spot-analysis-and-idw-raster-question/m-p/495045#M1568 <HTML><HEAD></HEAD><BODY><P>Image would help</P></BODY></HTML> Tue, 15 Aug 2017 03:23:16 GMT DanPatterson_Retired 2017-08-15T03:23:16Z Hot Spot Analysis and IDW Raster question https://community.esri.com/t5/spatial-statistics-questions/hot-spot-analysis-and-idw-raster-question/m-p/495044#M1567 <HTML><HEAD></HEAD><BODY><P>Hello,</P><P>I have been following the tutorial <EM>Hot Spot Analysis for ArcGIS 10.1 (<A href="http://www.arcgis.com/home/item.html?id=6626d5cc81a745f1b737028f7a519521"><SPAN style="color: black; text-decoration: underline;">Tutorial</SPAN></A>) </EM>on this page <A href="https://blogs.esri.com/esri/arcgis/2010/07/13/spatial-statistics-resources/">https://blogs.esri.com/esri/arcgis/2010/07/13/spatial-statistics-resources/</A>&nbsp;and have a question about the IDW grid.</P><P style="margin: 0in 0in 0pt;">I have used my own dataset, points that have a field count, which is the number of orders per address.&nbsp; I am using this field to create the hot spot dataset, which looks correct. Then I created the IDW raster using this and something does not look right.&nbsp; The dataset range is irregular, round on one end and long narrow on the other.&nbsp; I think this might have something to do with why the resulting grid has what are best described as streaking to the edge of the grid from the data.&nbsp; These streaking areas are originated in the hot spots,&nbsp;so they show up as long hot spots, which is not a correct representation. Maybe the IDW is not the best choice?&nbsp; Not quite sure where to go from here.&nbsp;&nbsp;</P><P style="margin: 0in 0in 0pt;">I find as I study cluster analysis I keep learning more and more...</P><P style="margin: 0in 0in 0pt;">Any ideas on how remedy this would be helpful&nbsp;</P><P style="margin: 0in 0in 0pt;">I did try the poly-line extent option, but then the raster does not match the point level hot spot data.</P><P style="margin: 0in 0in 0pt;">Thanks</P><P style="margin: 0in 0in 0pt;">Sarah</P></BODY></HTML> Thu, 27 Jul 2017 16:30:12 GMT https://community.esri.com/t5/spatial-statistics-questions/hot-spot-analysis-and-idw-raster-question/m-p/495044#M1567 SarahZaleski1 2017-07-27T16:30:12Z Re: Hot Spot Analysis and IDW Raster question https://community.esri.com/t5/spatial-statistics-questions/hot-spot-analysis-and-idw-raster-question/m-p/495045#M1568 <HTML><HEAD></HEAD><BODY><P>Image would help</P></BODY></HTML> Tue, 15 Aug 2017 03:23:16 GMT https://community.esri.com/t5/spatial-statistics-questions/hot-spot-analysis-and-idw-raster-question/m-p/495045#M1568 DanPatterson_Retired 2017-08-15T03:23:16Z