Bug report #11919
Calculation of areas in feet off by a factor of 10 in Illinois east projection
|Affected QGIS version:||2.6.1||Regression?:||No|
|Operating System:||Easy fix?:||No|
|Pull Request or Patch supplied:||No||Resolution:||duplicate|
|Crashes QGIS or corrupts data:||No||Copied to github as #:||20128|
When digitizing in EPSG:3435 ( Illinois East (ftUS)) and calculating areas from the $area value in the field calculator, the areas given are 1/10th of the true value. When digitizing the same area with the projection set to EPSG:26971 (Illinois East (meters)) the $area measurement is the correct value. Not sure if it's an epsg problem or internal meters to feet conversion problem.
I am uploading sample polygons in each projection for the same area covering a square field a bit over 16 ha ( 40 acres).
Platform is ubuntu 14.04 using qgis 2.6.1 from the ubuntugis unstable ppa
#1 Updated by Doug Newcomb about 5 years ago
WMS service for background imagery to see field digitized http://gis.apfo.usda.gov/arcgis/services/NAIP/Illinois_2014_1m_NC/ImageServer/WMSServer