I have a doubt about dynamic CRS, ellipsoids and area calculations. I am using QGIS 2.14.0 (still waiting for IT to install 2.14.11...)
When I load a polygon table into a new, empty project, it comes in as EPSG:32723. Looking at the Project Properties > General tab, no ellipsoid is defined. When I go to the CRS tab and activate dynamic transformation, I see that the ellipsoid has now been defined in the General tab (corresponding to the ellipsoid used by EPSG:32723).
Does this mean that until I tell QGIS to activate dynamic transformation, it is ignoring ellipsoid parameters for area and distance calculations? Because when I calculate area values for these polygons using EPSG:32723 and EPSG:32723 (Dynamic), I get different results.
EDIT: I saw a question similar to this from 2015, but it (and the replies) make no mention of the ellipsoid parameters being used or not used for area calculations.