On 1 February 2017 at 19:55, Neumann, Andreas <a.neum...@carto.net> wrote:
>
> Hi Nyall,
>
> Thanks for the explanations. I should have read the explanations of the help 
> text more closely. It explains it all.
>
> However, there still seem to be issues. Consider the following results below. 
> First column is the result of $area, second column is area($geometry).
>
> Sometimes the results are very close, in other cases the difference is 
> massive. Like in the very first row. 32'087 vs 190'605'589 square meters. 
> This can't be explained with ellipsoidical vs. planimetric. In this first 
> row, the result of area($geometry) (planimetric) seems correct, while the 
> ellipsoidical result ($area) is massively wrong.
>
> How can this huge difference be explained?
>

Can you share your dataset?

Nyall
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