Hello. I'm seeing behavior I don't understand when computing the area of the intersection of two geometries. Given the columns geom_a and geom_b, both MULTIPOLYGON geometries with the same SRID (4269 in this case), I'm selecting st_area(st_intersection(geom_a, geom_b)). In most cases, I'm getting results that look correct. But in a small percentage of cases, I'm getting cases where the area is much larger than expected (i.e. as much as 30x greater than the larger of st_area(geom_a) and st_area(geom_b)). It seems to me that it should always hold that the area of the smaller of two geometries should be the upper bound for the area of their intersection. I'm only seeing the issue in cases where the two geometries intersect, but neither contains the other. Does anyone have any ideas as to what could cause this?
Thank you in advance for any help, -Eric _______________________________________________ postgis-users mailing list postgis-users@postgis.refractions.net http://postgis.refractions.net/mailman/listinfo/postgis-users
