Kennedy, Paul <P.Kennedy <at> fugro.com.au> writes: > > > Hi > Simultaneous writers would be a better long term solution as we often improve the raster following initial creation. This improvement may well be a filter run on a sub region ( eg a despeckle) or updating a piece of the dtm with better information or even some manual edits as a last resort. > I can imagine a Hadoop style map/reduce would fit nicely into your sub window idea. Regardspk
Hi, Just thinking that while updating pieces of a massive target raster file with several simultaneous writers could probably be doable and make sense with coverage data like dtm, the advantage is not as great with raster maps and aerial/satellite image mosaics which need also overviews for effective practical use. I guess that piecewise automatic updating of overviews could be somewhat complicated thing to implement. Perhaps raster database formats like PostGIS raster or Rasterlite would suit better for this sort of update operations. -Jukka Rahkonen- _______________________________________________ gdal-dev mailing list gdal-dev@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/gdal-dev
