Brian,
ProportionOverlap is still supportoed, at least in version 8.0, and I can't
imaging that it isn't there in version 7.
Select ProportionOverlap(PROPERTY.OBJ, TOWNPLAN.OBJ)
From PROPERTY, TOWNPLAN
Where PROPERTY.OBJ Intersects TOWNPLAN.OBJ
But you could also consider using either AreaOverlap() or Overlap() to
calculate the actual size of the overlapping area:
Select CartesianArea(Overlap(PROPERTY.OBJ, TOWNPLAN.OBJ), "sq m")
"AREA_OVERLAP_SQ_M"
From PROPERTY, TOWNPLAN
Where PROPERTY.OBJ Intersects TOWNPLAN.OBJ
I would prefer Overlap as this function in combination with CartesianArea()
will let you specify the area unit.
Peter Horsbøll Møller
GIS Developer, MTM
Geographical Information & IT
COWI A/S
Odensevej 95
DK-5260 Odense S.
Denmark
Tel +45 6311 4900
Direct +45 6311 4908
Mob +45 5156 1045
Fax +45 6311 4949
E-mail [EMAIL PROTECTED]
http://www.cowi.dk/gis
-----Original Message-----
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Brian Cooper
Sent: Sunday, December 18, 2005 5:18 AM
To: [email protected]
Subject: [MI-L] Proportional overlap function
This function was available in Version 4 and 5, but does not appear to be in
version 7 or 8, is there a procedure that will allow me to establish the
overlap between polygons?
------------------------------------
Community Planning and Social Mapping Consultant
Brian Cooper
[EMAIL PROTECTED]
ABN:89 170 081 378
6 Sarah Place Minchinbury
NSW 2770
Australia
tel: +61 (0)2 90164767
fax: +61 (0)2 9016 4173
mobile: +61 (0)4 2524 1193
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