Thanks, Jim Steve. Yes, I guess I have to use postgreSQL query to define the
intersection layer (using intersect spatial query).
I still wonder about something, though. Let say I have the following layers:
layer A, layer B, and layer C. Layer C is the distinctly-colored intersection
layer,
You have to use a tool like PostgreSQL/PostGIS to do such a thing. It can
create true
geometries based on the intersection of other geometries. You'd have to do this
as
two separate layers though, AB intersections and AC intersections since the
intersections
would be defined in the connection
Hi Kreshna,
I don't think it is possible to achieve this with the cgi. Possibly some
application logic using mapscript could do. I have a simpler idea though,
if the map will be used for just presenting the data (not analysing) you could
assign an OPACITY parameter to the layers A,B,C and color
