topic the minimum feature number of spatial autocorrelation analysis (Moran's I) in ArcGIS Spatial Analyst Questions https://community.esri.com/t5/arcgis-spatial-analyst-questions/the-minimum-feature-number-of-spatial/m-p/560592#M8117 <HTML><HEAD></HEAD><BODY><SPAN>Hi,</SPAN><BR /><BR /><SPAN>I am trying to use Moran's I test statistic to measure the spatial autocorrelation of soil properties(e.g., soil organic carbon).</SPAN><BR /><BR /><SPAN>I checked ArcGIS Resource Online to see how Global Moran's I works, and the "Best Practice Guidelines" says that "Does the Input Feature Class contain at least 30 features? Results aren't reliable with less than 30 features". </SPAN><BR /><BR /><SPAN>So my question is why the number 30 is chosen as the threshold or the optimal feature number?</SPAN><BR /><BR /><SPAN>Thank you!</SPAN></BODY></HTML> Fri, 18 Oct 2013 13:38:10 GMT JunzhuLi 2013-10-18T13:38:10Z the minimum feature number of spatial autocorrelation analysis (Moran's I) https://community.esri.com/t5/arcgis-spatial-analyst-questions/the-minimum-feature-number-of-spatial/m-p/560592#M8117 <HTML><HEAD></HEAD><BODY><SPAN>Hi,</SPAN><BR /><BR /><SPAN>I am trying to use Moran's I test statistic to measure the spatial autocorrelation of soil properties(e.g., soil organic carbon).</SPAN><BR /><BR /><SPAN>I checked ArcGIS Resource Online to see how Global Moran's I works, and the "Best Practice Guidelines" says that "Does the Input Feature Class contain at least 30 features? Results aren't reliable with less than 30 features". </SPAN><BR /><BR /><SPAN>So my question is why the number 30 is chosen as the threshold or the optimal feature number?</SPAN><BR /><BR /><SPAN>Thank you!</SPAN></BODY></HTML> Fri, 18 Oct 2013 13:38:10 GMT https://community.esri.com/t5/arcgis-spatial-analyst-questions/the-minimum-feature-number-of-spatial/m-p/560592#M8117 JunzhuLi 2013-10-18T13:38:10Z