12.07.2012 14:36, Paul Meems (Top-X) ?????:
Thanks Even,
http://www.gdal.org/gdalbuildvrt.html does seems very interesting.
As I understand it, it will do the merging part (without actually
merging).
But it doesn't do the tiling part, right? Or is the vrt so optimized
tiling is no longer necessary?
Thanks,
Paul
2012/7/12 Even Rouault <even.roua...@mines-paris.org
<mailto:even.roua...@mines-paris.org>>
Selon "Paul Meems (Top-X)" <p.me...@topx-group.nl
<mailto:p.me...@topx-group.nl>>:
> Hi list,
>
> I have several aerial photos and I use MapWindow GIS to view them.
> MapWindow is already using GDAL v1.8
>
> Instead of loading each aerial photo as an individual layer I
want to
> create a local tiles store of the photos.
> I can then just load the tiles I need based on the scale and
view. This
> will most likely improve the performance.
>
> The process will be something like this:
> 1. Get the filenames of the photos
> 2. Merge them into one
> 3. Create tiles
> 4. Put the tiles in a SQLite database
>
> My first question: Is the above suggested process correct or
should I do it
> differently?
> My second question: What GDAL functions should I look into to
accomplish my
> process?
You could try to make a VRT from all your photos. It will be seen
as a single
GDAL dataset, and will take care of the burden of opening the
underlying photos
when needed. You can use the gdalbuildvrt utility to create the
VRT from the
photos.
>
> Thanks,
>
> Paul Meems
> The Netherlands
>
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There is an interesting work connected aerial imagery:
http://trac.osgeo.org/gdal/wiki/Correlator
http://correlatorgsoc2012.blogspot.com/
Best regards,
Dmitry
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