[gdal-dev] does gdal support multiple simultaneous writers to raster

[Jukka Rahkonen]

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-