[geos-devel] Fwd: Geometry/Rectangle Intersection: line touching rectangle

[Mika Heiskanen]

On 09/12/2014 01:03 PM, Sandro Santilli wrote:
> BTW, is this statement correct in the docs ?
>
>   [...] the second clips the boundaries of polygons,
>   not the polygons themselves.
>   In the latter case polygons will be converted to polylines
>   if any vertex is outside the clipping rectangle,
>    ^^^^^^^^^^^^^^^^^^^^
>   or will be cut out completely.
>
> Does it mean fully-contained polygons would be omitted from output ?
> Test 48 suggests the contrary (the polygon is found fully in output).

No, my wording is poor. What I tried to say was that if any vertex is 
outside, the result will always be either a polyline or nothing.
A polygon will result only if all vertices are in.

Regards,

Mika Heiskanen / Finnish Meteorological Institute