[gdal-dev] Warping and creating tiles using C++

[Nicu Tofan]

Hello,

I'm working on an application with requirements described below. Please
have a look at what I came up with so far and tell me if I'm on an awfully
wrong path.

Requirements
============

Application takes as input a number of image files +/- geo-referenced
Input may have different resolutions, SRS, bands
The user can alter projection and geo-reference parameters
Output consists of tiles resulting from all those images;
The arrangement of the tiles can be customized (the way tiles are arranged
and named)

gdalbuildvrt, gdalwarp and gdal2tiles.py indicate that these requirements
can be satisfied by gdal.


Implementation
==============

   - for each input dataset create a virtual dataset using
   GDALAutoCreateWarpedVRT(); this takes into consideration the changes
   made by the user and target SRS
   - follow the steps in gdalbuildvrt (CreateVRTNonSeparate) to generate a
   single virtual file; this involves GDALProxyPoolDatasetCreate,
   VRTAddSimpleSource (is there a simpler way?)
   - create base layer tiles from virtual dataset; use
   GDALDataset::RasterIO()
   - create tiles higher in the pyramid (gdal2tiles.py) from existing ones

Any advice / idea / pointers to higher level functions that do some of the
work is highly appreciated.


Thanks,

Nick
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