i use QGIS with openlayers-plugin and i´ve loaded google satellite as a layer. what i want to do is making a shape-layer (polygon) with the goal to get the area values of the polygons. i´ve activated on-the-fly-transformation and chosen Google Mercator (EPSG:900913) for the project and the shape-layer.
If i compare the values of the measure line tool in qgis with the one in google earth (desktop version) to make a rough estimate, i get two different values. they are same if i activate ellipsoidal on the measure line tool in QGIS. The area calculation takes places with ellipsoidal deactivated, so the area result in the attribute table is wrong. I know that the values of google earth are correct.
Does someone know a way to get an correct area calculation of the polygons?