One more thought added/left out:
the intersect function can then be called recursively, if we do a cross-match among multiple surveys. The final result is the common area of all the surveys inside the initial are specified.
Metacode in quasi-C:
AREA aa = ".....";
aa = survey1.intersect(aa,20); aa = survey2.intersect(aa,20); aa = survey3.intersect(aa,20);
now aa has the common area of the initial aa and the three surveys, with our given tolerance.
Cheers, Alex Received on 2003-02-05Z15:26:21