[mapserver-users] Dissolve Tool?

[Lehr, Steven]

Does anyone have a reliable dissolve tool that they would share.  I have
many cases where I need to dissolve parcels on a parcel_id (maybe up to
200,000 polygons in the whole file);  I know I can bring it down into
ESRI, but it adds multiple steps to my process.  I'd like to have a
Perl/python script that does:
 
dissolve.pl parcels parcel_id  
 
The output being a shapefile named parcels_dissolve.*
 
Where the inputs: parcels is a shapefile and parcel_id an attribute in
the .dbf;  The .shp, .dbf etc would be processed appropriately
dissolving on the attribute passed in, so it could be parcel_id to
dissolve parcels with similar parcel_id, or could be an attribute like
zoning; the resulting output file would contain only one record in the
.dbf file for each unique attribute.  Additionally the only attribute
left in the .dbf would be the attribute being dissolved on (unless you
have the ability to sum area or count # of occurrences; but no other
logic about which fields to bring forth; just the one attribute). 
 
Thanks for the help.  I'd be willing to pay for this project to be
written if someone is interested - drop me an email off list.

Steven Lehr
Associate Professor
College of Engineering
Embry-Riddle Aeronautical University (LB263)
600 S. Clyde Morris Blvd.
Daytona Beach, FL 32114-3900
386-226-7740
  

 
 
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