[PROJ] Determine "cut line" for arbitrary projection

[Nyall Dawson]

Hi list,

A question: given an arbitrary projection/CRS, is it possible to determine
the latitude (or projected x coordinate) at which features would need to be
"cut" in order to avoid artifacts when those features wrap around the
projection extremes.

Eg if it was EPSG:4326, we'd need to cut the features at +/- 180. But if
it's another projection... say mercator or spilhaus or ... is there any way
to reliably determine this cutting line?

Nyall
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