topic Re: Python help for math calculation (division) in Python Questions https://community.esri.com/t5/python-questions/python-help-for-math-calculation-division/m-p/656369#M51085 <HTML><HEAD></HEAD><BODY><P>I used !shape.area@acres! and it returned the proper acreage for my polygon features.&nbsp; </P></BODY></HTML> Mon, 20 Jul 2015 16:00:32 GMT IanMurray 2015-07-20T16:00:32Z Python help for math calculation (division) https://community.esri.com/t5/python-questions/python-help-for-math-calculation-division/m-p/656368#M51084 <HTML><HEAD></HEAD><BODY><P>I'm very new to Python and am working in model builder right now.&nbsp; I created a new field (Shp_Acs) and I want that field to calculate the area of the polygon in acres. I tried !shape.area@ACRES! and it doesn't bring back the correct value.&nbsp; </P><P>I was using VB and the expression was [SHAPE_STAr] /43560.&nbsp; SHAPE_STAr is a field in my table that has the area of the polygon in sq.ft.</P></BODY></HTML> Mon, 20 Jul 2015 15:49:43 GMT https://community.esri.com/t5/python-questions/python-help-for-math-calculation-division/m-p/656368#M51084 CrystalCowardin 2015-07-20T15:49:43Z Re: Python help for math calculation (division) https://community.esri.com/t5/python-questions/python-help-for-math-calculation-division/m-p/656369#M51085 <HTML><HEAD></HEAD><BODY><P>I used !shape.area@acres! and it returned the proper acreage for my polygon features.&nbsp; </P></BODY></HTML> Mon, 20 Jul 2015 16:00:32 GMT https://community.esri.com/t5/python-questions/python-help-for-math-calculation-division/m-p/656369#M51085 IanMurray 2015-07-20T16:00:32Z Re: Python help for math calculation (division) https://community.esri.com/t5/python-questions/python-help-for-math-calculation-division/m-p/656370#M51086 <HTML><HEAD></HEAD><BODY><P>What is the data type of the field you are attempting to calculate into?</P><P></P><P>Also, is your feature class projected? From the field calculator help, regarding area tokens:</P><P></P><P><SPAN style="color: #4d4d4d; font-family: Arial, Helvetica, sans-serif; font-size: 12.8000001907349px;">Using areal units on geographic data will yield questionable results as decimal degrees are not consistent across the globe.</SPAN></P></BODY></HTML> Mon, 20 Jul 2015 16:01:11 GMT https://community.esri.com/t5/python-questions/python-help-for-math-calculation-division/m-p/656370#M51086 DarrenWiens2 2015-07-20T16:01:11Z Re: Python help for math calculation (division) https://community.esri.com/t5/python-questions/python-help-for-math-calculation-division/m-p/656371#M51087 <HTML><HEAD></HEAD><BODY><P>It's a double field.</P><P>I tried what you wrote above and it worked!&nbsp; Thanks!</P></BODY></HTML> Mon, 20 Jul 2015 16:06:49 GMT https://community.esri.com/t5/python-questions/python-help-for-math-calculation-division/m-p/656371#M51087 CrystalCowardin 2015-07-20T16:06:49Z