I have tried running both gdalwarp and gdal_merge against a subset of hundreds of geotiff images via geographic bounding box. I would like to speed up the performance by running a geographic query against the shape file which was already created via gdaltindex against all the geotiff images. Next I would like to take the selected objects from the shapefile and use the location field to derive all geotiffs which are then used to as source to run against gdal_merge or gdalwarp.
How would run the geographic query against the shape file via a gdal command line program? Thanks, John J. Mitchell
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