https://community.esri.com/t5/arcgis-javascript-maps-sdk-questions/incorrect-geodeticlengthoperator-geodeticarea/m-p/1667557#M87904 <P><a href="https://community.esri.com/t5/user/viewprofilepage/user-id/14521">@LefterisKoumis</a>&nbsp;good catch on the documentation bug in the tutorial. We'll get it changed from unit(s) to unit, which is the correct parameter. It's documented in both the <A href="https://developers.arcgis.com/javascript/latest/api-reference/esri-geometry-operators-geodeticAreaOperator.html#execute" target="_self">geodeticAreaOperator</A> and <A href="https://developers.arcgis.com/javascript/latest/api-reference/esri-geometry-operators-geodeticLengthOperator.html#execute" target="_self">geodeticLengthOperator</A> under options..</P> Thu, 20 Nov 2025 16:13:10 GMT AndyGup 2025-11-20T16:13:10Z https://community.esri.com/t5/arcgis-javascript-maps-sdk-questions/incorrect-geodeticlengthoperator-geodeticarea/m-p/1667272#M87901 <P data-unlink="true">I am using the example as posted <A href="https://developers.arcgis.com/javascript/latest/tutorials/find-length-and-area/" target="_self">here</A>&nbsp;to calculate the geodetic length and area of a location. Wanted to use imperial units (ft and miles).</P><P data-unlink="true">So, I changed</P><LI-CODE lang="javascript">const geodesicLength = geodeticLengthOperator.execute(line, { units: "kilometers" }); const planarLength = lengthOperator.execute(line, { units: "kilometers" }); const geodesicArea = geodeticAreaOperator.execute(polygon, { units: "square-kilometers" }); const planarArea = areaOperator.execute(polygon, { units: "square-kilometers" });</LI-CODE><P>to:</P><LI-CODE lang="javascript">const geodesicLength = geodeticLengthOperator.execute(line, { units: "miles" }); const planarLength = lengthOperator.execute(line, { units: "feet" }); const geodesicArea = geodeticAreaOperator.execute(polygon, { units: "square-miles" }); const planarArea = areaOperator.execute(polygon, { units: "square-feet" }); </LI-CODE><P>Then I noticed that the geodetic measurements were way off incorrect</P><P><span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="LefterisKoumis_1-1763576466016.png" style="width: 400px;"><img src="https://community.esri.com/t5/image/serverpage/image-id/144134i4BD94B57CBB900DC/image-size/medium?v=v2&amp;px=400" role="button" title="LefterisKoumis_1-1763576466016.png" alt="LefterisKoumis_1-1763576466016.png" /></span></P><P><span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="LefterisKoumis_2-1763576497026.png" style="width: 400px;"><img src="https://community.esri.com/t5/image/serverpage/image-id/144135iBAC7BB89F9A1867E/image-size/medium?v=v2&amp;px=400" role="button" title="LefterisKoumis_2-1763576497026.png" alt="LefterisKoumis_2-1763576497026.png" /></span></P><P>Then I changed the "units" to "unit" for geodetic measurements&nbsp;</P><LI-CODE lang="javascript">const geodesicLength = geodeticLengthOperator.execute(line, { unit: "miles" }); const planarLength = lengthOperator.execute(line, { units: "feet" }); const geodesicArea = geodeticAreaOperator.execute(polygon, { unit: "square-miles" }); const planarArea = areaOperator.execute(polygon, { units: "square-feet" });</LI-CODE><P>&nbsp;</P><P>and now I get correct results!!</P><P><span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="LefterisKoumis_3-1763576705256.png" style="width: 400px;"><img src="https://community.esri.com/t5/image/serverpage/image-id/144136iC37C26827C9B6022/image-size/medium?v=v2&amp;px=400" role="button" title="LefterisKoumis_3-1763576705256.png" alt="LefterisKoumis_3-1763576705256.png" /></span></P><P><span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="LefterisKoumis_4-1763576725215.png" style="width: 400px;"><img src="https://community.esri.com/t5/image/serverpage/image-id/144137iC39B772CA145C923/image-size/medium?v=v2&amp;px=400" role="button" title="LefterisKoumis_4-1763576725215.png" alt="LefterisKoumis_4-1763576725215.png" /></span></P><P>I don't see anywhere in the documentation stating to use unit instead of units for geodetic measurements.</P><P>&nbsp;</P><P>&nbsp;</P> Wed, 19 Nov 2025 18:28:16 GMT https://community.esri.com/t5/arcgis-javascript-maps-sdk-questions/incorrect-geodeticlengthoperator-geodeticarea/m-p/1667272#M87901 LefterisKoumis 2025-11-19T18:28:16Z https://community.esri.com/t5/arcgis-javascript-maps-sdk-questions/incorrect-geodeticlengthoperator-geodeticarea/m-p/1667557#M87904 <P><a href="https://community.esri.com/t5/user/viewprofilepage/user-id/14521">@LefterisKoumis</a>&nbsp;good catch on the documentation bug in the tutorial. We'll get it changed from unit(s) to unit, which is the correct parameter. It's documented in both the <A href="https://developers.arcgis.com/javascript/latest/api-reference/esri-geometry-operators-geodeticAreaOperator.html#execute" target="_self">geodeticAreaOperator</A> and <A href="https://developers.arcgis.com/javascript/latest/api-reference/esri-geometry-operators-geodeticLengthOperator.html#execute" target="_self">geodeticLengthOperator</A> under options..</P> Thu, 20 Nov 2025 16:13:10 GMT https://community.esri.com/t5/arcgis-javascript-maps-sdk-questions/incorrect-geodeticlengthoperator-geodeticarea/m-p/1667557#M87904 AndyGup 2025-11-20T16:13:10Z