postGIS vs. TAB files

Richard Greenwood richard.greenwood at GMAIL.COM
Fri Aug 5 11:38:24 PDT 2005


Bart van den Eijnden <BEN <at> SYNCERA-ITSOLUTIONS.NL> writes:

> 
> One problem of the TAB support through OGR currently is that the attribute
indexes are not being used. So
> doing queries on large TAB files is not that fast.
> 
> Best regards,
> Bart

With shape files you can create an attribute index with OGR:
  ogrinfo -ro myTable -sql "create index on listing using ID"
This creates an XML file which tells OGR that there is an 
attribute index, and a MapInfo format index (so you might 
want to drop MapInfo indexes before you creat the new index).

I do not know if this works with TAB files.

Regards,
Richard Greenwood
www.greenwoodmap.com



More information about the MapServer-users mailing list