https://community.esri.com/t5/net-maps-sdk-questions/how-to-calculate-the-sum-area-of-a-polygon/m-p/1595071#M13380 <P><STRONG><SPAN>Instead of looping through features, I need a way to calculate the sum area of a polygon featurelayer efficiently.&nbsp;</SPAN>How to use QueryStatisticsAsync to calculate the total area of all graphics in a FeatureLayer?</STRONG></P> Thu, 13 Mar 2025 09:06:05 GMT happygis 2025-03-13T09:06:05Z https://community.esri.com/t5/net-maps-sdk-questions/how-to-calculate-the-sum-area-of-a-polygon/m-p/1595071#M13380 <P><STRONG><SPAN>Instead of looping through features, I need a way to calculate the sum area of a polygon featurelayer efficiently.&nbsp;</SPAN>How to use QueryStatisticsAsync to calculate the total area of all graphics in a FeatureLayer?</STRONG></P> Thu, 13 Mar 2025 09:06:05 GMT https://community.esri.com/t5/net-maps-sdk-questions/how-to-calculate-the-sum-area-of-a-polygon/m-p/1595071#M13380 happygis 2025-03-13T09:06:05Z https://community.esri.com/t5/net-maps-sdk-questions/how-to-calculate-the-sum-area-of-a-polygon/m-p/1595473#M13385 <P>Hi there,</P><P>Thank you for the question!</P><P>To efficiently calculate the total area of all polygons in a <STRONG><FONT face="courier new,courier">FeatureLayer</FONT></STRONG> without looping through individual features, you can use the <FONT face="courier new,courier"><STRONG>QueryStatisticsAsync</STRONG></FONT> method. This approach is much faster and cleaner, especially for large datasets.</P><P>Here's how you can achieve this:</P><LI-CODE lang="csharp">// Define statistic definition for summing polygon areas var areaStatisticDefinition = new StatisticDefinition("Shape_Area", StatisticType.Sum, "TotalArea"); // Set up statistics query parameters var queryParameters = new StatisticsQueryParameters(new List&lt;StatisticDefinition&gt; { areaStatisticDefinition }); // Execute statistics query asynchronously on your FeatureLayer var statisticsResult = await yourFeatureLayer .FeatureTable .QueryStatisticsAsync(queryParameters); // Retrieve total area result double totalArea = 0; if (statisticsResult.Any()) { totalArea = Convert.ToDouble(statisticsResult.First().Statistics["TotalArea"]); } // Output or use the totalArea as needed Console.WriteLine($"Total Area: {totalArea}");</LI-CODE><P>&nbsp;</P><P><SPAN>Let me know if you have any questions or run into issues while implementing this!&nbsp;</SPAN></P> Fri, 14 Mar 2025 00:25:19 GMT https://community.esri.com/t5/net-maps-sdk-questions/how-to-calculate-the-sum-area-of-a-polygon/m-p/1595473#M13385 pnarkhede 2025-03-14T00:25:19Z https://community.esri.com/t5/net-maps-sdk-questions/how-to-calculate-the-sum-area-of-a-polygon/m-p/1607485#M13488 <P>is "Shape_Area" a preserve fieldName? there is no Shape_Area in my table.</P> Sat, 19 Apr 2025 13:13:42 GMT https://community.esri.com/t5/net-maps-sdk-questions/how-to-calculate-the-sum-area-of-a-polygon/m-p/1607485#M13488 happygis 2025-04-19T13:13:42Z