Hi there, This is almost certainly an RTFM question, but I need a pointer to what manual pages I need to read. I'm quite new to gdal and coming to it backwards. I'm working with python and basically trying to implement the suggestion Frank makes here in python:
http://lists.osgeo.org/pipermail/gdal-dev/2009-March/020200.html So I've run gdaladdo on a .vrt file to create a vrt.ovr file; the .vrt file is processed by another python script later. The problem is that the overviews are not high enough quality and I'd like to warp the overviews using cubic spline sampling. I know a little bit how to work with ReprojectImage as discussed in the above post. The thing I don't understand is how to get the dataset handles for a specific overview so I can regenerate it. I'm pretty sure this is a fundamental misunderstanding of how overviews are generated and handled in gdal, but I can't find any documentation to enlighten me. Frank says in the above post: "For instance, this C entry point could likely be used with hSrcDS being the base datset, and hDstDS being the dataset for the overviews." My understanding is that I will have to reproject each individual zoom level into the overview file using a different SetGeoTransform, so I need somehow to reference a dataset in the overview at an individual zoom level. Am I misunderstanding? Thanks for any links or additional information, Dusty _______________________________________________ gdal-dev mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/gdal-dev
