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build_overviews
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James David Smith
Hello,
Would anyone happen to know the answer to this question? https://stackoverflow.com/questions/57005499/rasterio-version-of-arcgis-raster-pyramids Essentially I am trying to copy the ArcGIS build overviews dialog box. But I am unsure how many overviews to use or at what levels they should be. I guess this is more of a general GDAL question that rasterio specific. Thanks, James |
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vincent.sarago@...
Hi James,
The level of overviews is usually linked to the size of the raster and its internal tiles (block). here is an example in rio-cogeo: https://github.com/cogeotiff/rio-cogeo/blob/master/rio_cogeo/utils.py#L95-L118 Let say you have a 10 000 x 10 000 px raster with 256x256 block/tile size (to allow fast reading). The overview level is then 6 which results in `[2, 4, 8, 16, 32, 64]` levels (https://github.com/cogeotiff/rio-cogeo/blob/master/rio_cogeo/cogeo.py#L223). |
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James David Smith
A belated thanks for this Vincent !
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On Fri, 12 Jul 2019 at 14:56, <vincent.sarago@...> wrote:
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