Apologies if this is not strictly a GeoServer question, it may be a WFS
specification question..

If I have a data layer of polygons in one CRS e.g epsg:4326 and I make a WFS
request against it with an intersects filter using a linestring encoded in a
different CRS e.g epsg:900913 what is the behaviour of the intersection if
the line is long and curvature of the earth comes into play? 

I believe that linestrings are linearly interpolated but are the 900913
coordinates converted to 4326 and then linearly interpolated in the 4326
CRS, or is the linestring linearly interpolated in it's supplied CRS
(900913) and then tested against the 4326 data as the two would potentially
give different answers.

Thanks in advance, my head is hurting 

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