I have a map scan (scale 1:500, CRS probably: ETRS89 / UTM Zone 33N) and want to georeference it. Therefore, I set a ground map (Google Satellite, CRS: WGS 84/ Pseudo Mercator). After georeferencing, the scaling of my map is incorrect. My area has grown from 1250 m² to 3000 m². On the fly projecting is enabled and I also set the project CRS manually to Pseudo Mercator.
Does anyone have any idea of where I'm going wrong?