https://community.esri.com/t5/arcgis-pro-questions/real-surface-area-using-a-raster-calculator-in/m-p/1316678#M71907 <P>other than the numbers, did you type anything else, rather than selecting from what is provided?</P><P>the [ ] brackets don't look correct since Cos isn't for a list, but a raster</P> Tue, 08 Aug 2023 22:47:10 GMT DanPatterson 2023-08-08T22:47:10Z https://community.esri.com/t5/arcgis-pro-questions/real-surface-area-using-a-raster-calculator-in/m-p/1316666#M71904 <DIV class=""><DIV class="">I have a slope dataset. I have to count its real surface area using the following equation:</DIV></DIV><DIV class=""><DIV class=""><span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="Screenshot (523).png" style="width: 400px;"><img src="https://community.esri.com/t5/image/serverpage/image-id/77613iEA2D25246A8252CB/image-size/medium?v=v2&amp;px=400" role="button" title="Screenshot (523).png" alt="Screenshot (523).png" /></span><P>The count of the cells is 5839737. I tried to input the raster set and the count of cells in the equation but the calculator fails every time.</P><P>5839737 / Cos (["Reclass10"]) * 3.1415 /180</P><P>I input the above algebra expression which is wrong.</P><P>What can I do to correct the algebra expression?</P></DIV></DIV> Tue, 08 Aug 2023 22:17:37 GMT https://community.esri.com/t5/arcgis-pro-questions/real-surface-area-using-a-raster-calculator-in/m-p/1316666#M71904 jahillganvar 2023-08-08T22:17:37Z https://community.esri.com/t5/arcgis-pro-questions/real-surface-area-using-a-raster-calculator-in/m-p/1316678#M71907 <P>other than the numbers, did you type anything else, rather than selecting from what is provided?</P><P>the [ ] brackets don't look correct since Cos isn't for a list, but a raster</P> Tue, 08 Aug 2023 22:47:10 GMT https://community.esri.com/t5/arcgis-pro-questions/real-surface-area-using-a-raster-calculator-in/m-p/1316678#M71907 DanPatterson 2023-08-08T22:47:10Z https://community.esri.com/t5/arcgis-pro-questions/real-surface-area-using-a-raster-calculator-in/m-p/1318813#M72105 <P>kinda very late but removing the [] worked! thank you so much</P> Tue, 15 Aug 2023 17:45:04 GMT https://community.esri.com/t5/arcgis-pro-questions/real-surface-area-using-a-raster-calculator-in/m-p/1318813#M72105 jahillganvar 2023-08-15T17:45:04Z https://community.esri.com/t5/arcgis-pro-questions/real-surface-area-using-a-raster-calculator-in/m-p/1318831#M72109 <P>Glad it worked out.&nbsp; It is the small things usually.</P> Tue, 15 Aug 2023 18:31:27 GMT https://community.esri.com/t5/arcgis-pro-questions/real-surface-area-using-a-raster-calculator-in/m-p/1318831#M72109 DanPatterson 2023-08-15T18:31:27Z