topic polygon cell mean calculation in Data Management Questions https://community.esri.com/t5/data-management-questions/polygon-cell-mean-calculation/m-p/222004#M12601 <HTML><HEAD></HEAD><BODY><SPAN>System: ArcGIS 9.3</SPAN><BR /><SPAN>Dataset: </SPAN><BR /><SPAN>1. polygons of 3000 grid cells, each containing the average annual temperature of the grid cell </SPAN><BR /><SPAN>2. tree distribution map for 5 species (polygons) (species 1 to 5)</SPAN><BR /><BR /><SPAN>Purpose</SPAN><BR /><SPAN>I want to know the average annual temperature of the ranges of species 1 to 5.</SPAN><BR /><SPAN>Also, I want to compare if there is any difference in average annual temperature between the species distribution. </SPAN><BR /><BR /><SPAN>Procedure:</SPAN><BR /><SPAN>Step 1: </SPAN><BR /><SPAN>Clip the grid cell polygons using the distribution maps of the five tree species respectively.</SPAN><BR /><BR /><SPAN>Step 2: calculate the average of the annual temperature of the clipped polygons from species 1 to 5 </SPAN><BR /><BR /><SPAN>Problem: </SPAN><BR /><SPAN>Please kindly advise which method in ArcGIS 9.3 can perform step 2 for polygons.</SPAN><BR /><BR /><SPAN>Thank you in advance.</SPAN><BR /><BR /><SPAN>(Once zonal statistics was suggested.</SPAN><BR /><SPAN>However, it was based on raster. </SPAN><BR /><SPAN>I tried it but found this was time and space-consuming </SPAN><BR /><SPAN>to transfer polygons to raster based on fine-scale.)</SPAN></BODY></HTML> Wed, 06 Jun 2012 11:06:27 GMT ElaineKuo 2012-06-06T11:06:27Z polygon cell mean calculation https://community.esri.com/t5/data-management-questions/polygon-cell-mean-calculation/m-p/222004#M12601 <HTML><HEAD></HEAD><BODY><SPAN>System: ArcGIS 9.3</SPAN><BR /><SPAN>Dataset: </SPAN><BR /><SPAN>1. polygons of 3000 grid cells, each containing the average annual temperature of the grid cell </SPAN><BR /><SPAN>2. tree distribution map for 5 species (polygons) (species 1 to 5)</SPAN><BR /><BR /><SPAN>Purpose</SPAN><BR /><SPAN>I want to know the average annual temperature of the ranges of species 1 to 5.</SPAN><BR /><SPAN>Also, I want to compare if there is any difference in average annual temperature between the species distribution. </SPAN><BR /><BR /><SPAN>Procedure:</SPAN><BR /><SPAN>Step 1: </SPAN><BR /><SPAN>Clip the grid cell polygons using the distribution maps of the five tree species respectively.</SPAN><BR /><BR /><SPAN>Step 2: calculate the average of the annual temperature of the clipped polygons from species 1 to 5 </SPAN><BR /><BR /><SPAN>Problem: </SPAN><BR /><SPAN>Please kindly advise which method in ArcGIS 9.3 can perform step 2 for polygons.</SPAN><BR /><BR /><SPAN>Thank you in advance.</SPAN><BR /><BR /><SPAN>(Once zonal statistics was suggested.</SPAN><BR /><SPAN>However, it was based on raster. </SPAN><BR /><SPAN>I tried it but found this was time and space-consuming </SPAN><BR /><SPAN>to transfer polygons to raster based on fine-scale.)</SPAN></BODY></HTML> Wed, 06 Jun 2012 11:06:27 GMT https://community.esri.com/t5/data-management-questions/polygon-cell-mean-calculation/m-p/222004#M12601 ElaineKuo 2012-06-06T11:06:27Z Re: polygon cell mean calculation https://community.esri.com/t5/data-management-questions/polygon-cell-mean-calculation/m-p/222005#M12602 <HTML><HEAD></HEAD><BODY><SPAN>Can you simply open the attribute table for each type, right click on the temp column, and choose statistics? This will return count, min, max, sum, mean, std deviation.</SPAN></BODY></HTML> Fri, 08 Jun 2012 19:26:29 GMT https://community.esri.com/t5/data-management-questions/polygon-cell-mean-calculation/m-p/222005#M12602 JimCousins 2012-06-08T19:26:29Z