Create a TileIndex shape file for raster data dynamically

[Zhonghai Wang]

Hi Trond,

thanks you for your clues for creating the index file, I am looking forword
to sharing your experience of creating the utility programmatically.
Actually, I create more often MapInfo seamless layer programmatically, but I
am not very familar with the ESRI index file format, so I am just not sure
how I should use the ShapeLib to create the index file.

I've read the source C code for GDALTINDEX utility in the GDAL/OGR source
package, unfortunatelly, I have not totally understand the source code. Here
is the source code link, hope that it can give you some additional
information for your experiment:

http://trac.osgeo.org/gdal/browser/trunk/gdal/apps/gdaltindex.c

Regards

Zhonghai

On 9/26/07, Trond Michelsen <trondmm-mapserver at crusaders.no> wrote:
>
> On Mon, Sep 24, 2007 at 09:17:06AM +0200, Zhonghai Wang wrote:
> > I know that the tile index shape file for raster data works very well in
> > MapServer. I am just wondering if there is someway to create the tile
> index
> > file dynamically using MapScript or GDAL/OGR, not only use the MapServer
> > utilities.
> >
> > Do you guys have any idea? or did anyone ever do anything like this?
>
> I may need to generate my own raster tileindexes myself soon, and
> based on what I've read about gdaltindex, it should be fairly easy to
> do.
>
> If I've understood everything correctly, all you have to do, is
> generate a shapefile with rectangles that has the same coordinates as
> the boundaries of each raster file. Then, the path to that file needs
> to be placed in the field "location" in the dbf-file that accompanies
> the shapefiles.
>
> I'll take a stab at making a perl-utility for this tomorrow. I'll let
> you know how it turns out.
>
> --
> Trond Michelsen
>
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