id summary reporter owner description type status priority milestone component version resolution keywords cc must_fix platform platform_version status_info 1219 OTFT on, layer's and project's CRS the same: measure tools and Identify Features return impossible measurments smizuno homann "Occurs on Windows and Linux - don't know about Mac. Project CRS set to epsg:32615 or 26915 (haven't tried others), measures in meters; PostGIS layer in same CRS. Ellipsoid for distance measurements is WGS84. I created two squares, 1 meter and 100 meters on a side, and located at 500000, 5000000. With OTF turned OFF Identify reports derived area of 1.000 m2, 10000.000 m2 respectively. These are the expected values. Using the Measure Area tool to measure the squares gives reasonable values (variation due to drawing accuracy). Linux: With OTF turned ON Identify reports derived area of 5.740 ha, 1.046 ha respectively. These are incorrect, especially for the 1m square. Windows: With OTF turned ON Identify reports derived area of 0.004 m2, 1.046 ha respectively. These are incorrect, especially for the 1m square. With OTF turned ON, the area reported using the Measure Area tool drawing on the squares are similar, with the 1m showing wildly varying values - very small to quite large (several ha) depending on how the area was drawn. The area reported also varies with the location the squares are positioned at. I have tested with actual dataset (a Minnesota county set) and find that the discrepancies are present but fairly small as the objects get larger. Mandriva Linux x86_64: r9037, GEOS 3.0.0, PROJ 4.6.0 Windows XP: r9044, GEOS 3.0.0, PROJ 4.6.0" enhancement closed minor: annoyance Version 1.2.0 Projection Support Trunk fixed measure area line Yes All 0