[gdal-dev] Tiled GeoTiff that reduce the amount of reads in XYZ maps

[jratike80]

Guy Doulberg wrote
> Hi all,
> 
> I am trying to use cloud optimized geotiff(cog) to reduce the block
> fetched
> when accessing a raster.
> 
> The use case I am trying to build, is a TileServer that serves tile in
> openlayer map.
> The rasters are to be stored on a remote location, in my case azure blob
> storage.
> 
> We were able to do that, and you can see the code here:
> https://github.com/satellogic/telluric/blob/master/telluric/
> georaster.py#L1497
> 
> The problem is, when running in verbose mode I can see that there are many
> requests to the blob storage,
> 
> I am responsible of creating the raster, is there a way in your opinion I
> can create the raster aligned to the XYZ tiling system so when I try to
> fetch a tile from the raster I will be able to do that with a single or
> close to that call?
> 
> In the current raster preparation code that I have, get_tile can reach
> even
> 10 requests.

Hi,

I wonder if something re-usable is implemented in the GeoTIFF cache type of
MapCache http://mapserver.org/mapcache/caches.html.

-Jukka Rahkonen-



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