<div dir="ltr"><div><div><div><div><div><div>Hi list:<br><br></div><div>(Maybe related with Rob Vech e-mail: strange results when calculating area and perimeter )<br></div><div><br></div>I'm was trying calculate area of a layer with two polygons, but I can't get right values. Layer and project are in UTM 17s (epsg 32717) projection. I want square kilometers, so the used expression is: <br>
<br>$area/100000<br><br></div>Field type is real, 10 digits, 2 decimals (also tryed with 15 digits) buth result is wrong for one polygon and zero for second.<br><br></div>The layer has not geometric errors (I've check it), and can be download from <a href="https://sites.google.com/site/ccerdan/Home/Cuencas_Cajamarca.zip?attredirects=0&d=1" target="_blank">https://sites.google.com/site/ccerdan/Home/Cuencas_Cajamarca.zip?attredirects=0&d=1</a><br>
<br></div>There are a field "Area_KM2" that was calculated in ArcGIS and it has the right values. The "Area_Ha" has the (wrong) result of QGIS field calculator.<br><br></div>What is wrong with field calculator?<br>
<br></div><div>UPDATE: After a reboot, field calculator found the right values... but What was wrong?<br></div><div><br></div>Carlos<br><div><div><div><div><br><br></div></div></div></div></div>