[MapServer-users] New GDAL Raster Tile Index driver

[Even Rouault]

(adding back the list)

Le 25/01/2024 à 20:33, Richard Greenwood a écrit :
> Sounds like an interesting new driver. What advantages does it have 
> over tile indexes created with gdaltindex?

None, since gdaltindex is the nominal way to create a tile index usable 
by both the GTI driver and MapServer.

> Or in what situations would GTI be preferable to tile indexes? I don't 
> want to miss out on any new goodness!

GTI was created mostly to serve GDAL needs, in particular users that 
used to use XML VRT to create virtual mosaic. XML VRT works fine, until 
you try adding 100,000 + tiles into it, where it becomes huge and slow 
to load.

The good thing is that a GTI index can now be used nominally by both 
GDAL and MapServer.

>
> Thanks,
> Rich
>
> On Wed, Jan 24, 2024 at 12:30 PM Even Rouault via MapServer-users 
> <mapserver-users at lists.osgeo.org> wrote:
>
>     Hi,
>
>     while I'm still thinking to it, I just wanted to mention a new driver
>     that has landed into the development version of GDAL, code-named
>     "GTI",
>     for GDAL Raster Tile Index (
>     https://gdal.org/drivers/raster/gti.html )
>     which will be available in the GDAL 3.9 release. This is basically a
>     MapServer raster tile index that is recognized as a GDAL raster,
>     with a
>     few optional metadata items, typically to declare the target
>     resolution,
>     stored in the vector file (typically GeoPackage or FlatGeoBuf), or
>     externally in a XML file. This should enhance the interoperability
>     between GDAL and MapServer.
>
>     If using MapServer against GDAL 3.9, you could potentially use such a
>     tile index as a classic DATA in your mapfile. One nice enhancement is
>     that it can also support referencing other tile indexes or plain
>     rasters
>     for overviews. Many possibilities to explore.
>
>     Even
>
>     -- 
>     http://www.spatialys.com
>     My software is free, but my time generally not.
>
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>
>
>
> -- 
> Richard W. Greenwood
> www.greenwoodmap.com <http://www.greenwoodmap.com>

-- 
http://www.spatialys.com
My software is free, but my time generally not.
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