https://community.esri.com/t5/esri-tutorials-questions/std-in-cell-statistic/m-p/1014576#M360 <P>There's nothing complex going on, its the STD calculated from coincident raster cell values.</P><P><A href="https://www.mathsisfun.com/data/standard-deviation.html" target="_blank">Standard Deviation and Variance (mathsisfun.com)</A></P> Thu, 07 Jan 2021 10:15:27 GMT DavidPike 2021-01-07T10:15:27Z https://community.esri.com/t5/esri-tutorials-questions/std-in-cell-statistic/m-p/1014569#M359 <P>How standard deviation is calculated for number of rasters in the Cell statistic tool?</P><P>The output is a raster where each pixel represent the STD. I want to understand the equation behind it.</P> Thu, 07 Jan 2021 09:09:19 GMT https://community.esri.com/t5/esri-tutorials-questions/std-in-cell-statistic/m-p/1014569#M359 ChenMeged 2021-01-07T09:09:19Z https://community.esri.com/t5/esri-tutorials-questions/std-in-cell-statistic/m-p/1014576#M360 <P>There's nothing complex going on, its the STD calculated from coincident raster cell values.</P><P><A href="https://www.mathsisfun.com/data/standard-deviation.html" target="_blank">Standard Deviation and Variance (mathsisfun.com)</A></P> Thu, 07 Jan 2021 10:15:27 GMT https://community.esri.com/t5/esri-tutorials-questions/std-in-cell-statistic/m-p/1014576#M360 DavidPike 2021-01-07T10:15:27Z https://community.esri.com/t5/esri-tutorials-questions/std-in-cell-statistic/m-p/1014604#M361 <P>You must have missed the reference&nbsp;</P><P><A href="https://pro.arcgis.com/en/pro-app/latest/tool-reference/spatial-analyst/how-cell-statistics-works.htm" target="_blank" rel="noopener">How Cell Statistics works—ArcGIS Pro | Documentation</A></P><P>The basic STD equation uses the population method and not the sample.&nbsp;</P><P><EM>Note that the standard deviation is calculated on the entire population (the&nbsp;N&nbsp;method); it is not estimated based on a sample (the&nbsp;N-1&nbsp;method).</EM></P> Thu, 07 Jan 2021 11:59:54 GMT https://community.esri.com/t5/esri-tutorials-questions/std-in-cell-statistic/m-p/1014604#M361 DanPatterson 2021-01-07T11:59:54Z https://community.esri.com/t5/esri-tutorials-questions/std-in-cell-statistic/m-p/1015881#M366 <P>Answered?&nbsp; It is still open.&nbsp; Do you need more information?</P> Tue, 12 Jan 2021 11:34:12 GMT https://community.esri.com/t5/esri-tutorials-questions/std-in-cell-statistic/m-p/1015881#M366 DanPatterson 2021-01-12T11:34:12Z