[Shapelib] spatial index support - idx file

Gregory Muench gmuench at currentcomm.net
Thu Mar 10 10:16:05 EST 2005

It turns out that the idx file they use is an RTree(?) index file.  The
file header indicates "Gist data file  rt_point_ext".


-----Original Message-----
From: shapelib-bounces at lists.maptools.org
[mailto:shapelib-bounces at lists.maptools.org] On Behalf Of Frank
Sent: Thursday, March 10, 2005 9:44 AM
To: Shapelib Development
Subject: Re: [Shapelib] spatial index support - idx file

On Thu, 10 Mar 2005 08:48:40 -0500, Gregory Muench
<gmuench at currentcomm.net> wrote:
> Thanks, Frank.  That does answer my question.
> The reason I was asking is because I am using a .NET mapping control
> from a company called Spatially Aware, and they use what they have
> termed a "spatial index" file with an idx extension in order to speed
> loading of features on maps.  They have a method to build this index
> file, but it is really slow, so I was attempting to get a speedier
> version of the same method.


Ah.  Well, I would assume it is an index format specific to their
software, so you will need to talk to them about it.  

Best regards,
I set the clouds in motion - turn up   | Frank Warmerdam,
warmerdam at pobox.com
light and sound - activate the windows | http://pobox.com/~warmerdam
and watch the world go round - Rush    | Geospatial Programmer for Rent
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