At 10:05 AM 07/14/1999 -0400, Mitchell, Will wrote:

>It boils down to this question - can Proportion Sum be used in an SQL
>select statement to obtain overlapped area?

Try this. It is a MapBasic statement, but they usually work in the SQL 
dialog too.

AreaOverlap() Function
         Returns the area resulting from the overlap of two closed objects.

         AreaOverlap ( object1, object2 )
         object1 and object2 are closed objects.

Return Value
         A Float value representing the area (in MapBasic's current area 
units) of the overlap of the two objects.

Steve Wallace
GIS & Market Information Manager
Florida Farm Bureau Insurance Companies

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