[postgis-users] Why PostGIS ST_Intersection much slower than ArcGIS Intersect ?

[Andrea Peri]

Paul Ramsey wrote:
>Google knows,
>http://trac.osgeo.org/geos/wiki/PreparedGeometry
>http://blog.cleverelephant.ca/2008/10/postgis-performance-prepared-geometry.html
>
>p

I see
http://blog.cleverelephant.ca/2008/10/postgis-performance-prepared-geometry.html

Now I understand better.

As I understand:
It is the "prepared geometry" solution
it is used on geos and just used on these postgis functions:
ST_Intersects(), ST_Contains(), ST_Covers() and ST_ContainsProperly(),
but actually, don't used by the ST_Intersection().


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Andrea Peri
. . . . . . . . .
qwerty àèìòù
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