Derek, Writing into a raster band is a lot like reading into it. Use the function you use to read the pixels to write the pixels back. Don't forget to close the dataset at the end using GDALClose() [1]. Also, check out the GDALFlushCache() and similar functions in [2].
[1]: http://www.gdal.org/gdal_8h.html#0984222d45a72028fcbbf1f44831ffbc [2]: http://www.gdal.org/gdal_8h.html On Tue, Jul 5, 2011 at 9:16 PM, Cole, Derek <dc...@integrity-apps.com>wrote: > Hello, > > I think I started to ask about this before on this forum, but I have since > used GDAL a bit more and might be better to generate a new thread. > > I have been using GDAL to read in NITF files, getting the RasterBand data, > and manipulating it, and displaying the results in my viewer. > > Now, I would like to be able process data, then save it into a new NITF. > This new NITF will have the same geocoords and all of the same data as the > original, with the exception of a new raster band replacing the original. Is > there a way to create a clone of the original image WITHOUT copying the > data? I do not want to have to replicate the old data on disk, only the > overwrite it with my new data that is coming from the external processing. I > looked into creating the virtual data sets, but I am not sure if that is my > answer. If I just pass in an empty "" as the destination, it says it will > create that dataset in memory. Is this what I want to do? > > My algorithm processes only a portion of the image at a time, so what I > envisioned in my head was being able to essentially write out header /meta > information in a file, and "append" blocks of raster data into the right > place in the file, as they complete processing. This way there is no single > lag-point while waiting to create a copy of data on disk to another place on > disk, or having to create a large file on disk all at once. These image > files are 1GB+ > > Any tips for trying to set up this scenario? > > Thanks > > Derek > > _______________________________________________ > gdal-dev mailing list > gdal-dev@lists.osgeo.org > http://lists.osgeo.org/mailman/listinfo/gdal-dev > -- Best regards, Chaitanya kumar CH. /tʃaɪθənjə/ /kʊmɑr/ +91-9494447584 17.2416N 80.1426E
_______________________________________________ gdal-dev mailing list gdal-dev@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/gdal-dev
