topic AREA CACLUATIONS in Data Management Questions https://community.esri.com/t5/data-management-questions/area-cacluations/m-p/61687#M3606 <HTML><HEAD></HEAD><BODY><SPAN>Hi,</SPAN><BR /><BR /><SPAN>I am trying to calculate area of polygons using a shapefile from the world bank where countries are defined.</SPAN><BR /><SPAN>When however I am trying to calcuate the area, the numbers that emerge are different from the official statistics on area.</SPAN><BR /><SPAN>Morever, whenever I use a different projection (e.g. equal area) adn recalculate the area, I always get the same results.</SPAN><BR /><BR /><SPAN>Can someone tell me where the mistake could come from?</SPAN><BR /><BR /><SPAN>Thanks!</SPAN></BODY></HTML> Wed, 20 Mar 2013 19:01:13 GMT AnLat 2013-03-20T19:01:13Z AREA CACLUATIONS https://community.esri.com/t5/data-management-questions/area-cacluations/m-p/61687#M3606 <HTML><HEAD></HEAD><BODY><SPAN>Hi,</SPAN><BR /><BR /><SPAN>I am trying to calculate area of polygons using a shapefile from the world bank where countries are defined.</SPAN><BR /><SPAN>When however I am trying to calcuate the area, the numbers that emerge are different from the official statistics on area.</SPAN><BR /><SPAN>Morever, whenever I use a different projection (e.g. equal area) adn recalculate the area, I always get the same results.</SPAN><BR /><BR /><SPAN>Can someone tell me where the mistake could come from?</SPAN><BR /><BR /><SPAN>Thanks!</SPAN></BODY></HTML> Wed, 20 Mar 2013 19:01:13 GMT https://community.esri.com/t5/data-management-questions/area-cacluations/m-p/61687#M3606 AnLat 2013-03-20T19:01:13Z Re: AREA CACLUATIONS https://community.esri.com/t5/data-management-questions/area-cacluations/m-p/61688#M3607 <HTML><HEAD></HEAD><BODY><SPAN>Area shouldn't change depending on your projection.&nbsp; Inside the attribute table for your polygon layer, add a new field called area.&nbsp; Right click on the field name ("area") and select calculate geometry.&nbsp; For the last option, make sure you have the same units selected as the official statistics.&nbsp; (Probably square miles or sq. km).&nbsp; If the areas close but still don't match, then the official statistics were probably calculated using different data.</SPAN></BODY></HTML> Wed, 20 Mar 2013 19:25:39 GMT https://community.esri.com/t5/data-management-questions/area-cacluations/m-p/61688#M3607 StavrosC 2013-03-20T19:25:39Z