[gdal-dev] Write overviews directly to S3

[Jeremy Palmer]

Hi All,

Is is possible to directly write external overview to a S3 bucket? With GDAL 2.1.2 I get an error reporting that seek is not supported when writing to vsis3:

gdaladdo /vsis3/my-bucket/data/1000.tif 2
ERROR 6: Seek not supported on writable /vsis3 files
ERROR 1: _tiffSeekProc:Resource temporarily unavailable
ERROR 1: _tiffWriteProc:Resource temporarily unavailable
ERROR 1: /vsis3/my-bucket/data/1000.tif.ovr:Error writing TIFF header
ERROR 6: Seek not supported on writable /vsis3 files
ERROR 1: _tiffSeekProc:Resource temporarily unavailable
ERROR 1: TIFFAdvanceDirectory:/vsis3/my-bucket/data/1000.tif.ovr: Error fetching directory count
ERROR 6: Seek not supported on writable /vsis3 files
ERROR 1: _tiffSeekProc:Resource temporarily unavailable
ERROR 1: TIFFAdvanceDirectory:/vsis3/my-bucket/data/1000.tif.ovr: Error fetching directory count
ERROR 6: Seek not supported on writable /vsis3 files
ERROR 1: _tiffSeekProc:Resource temporarily unavailable
ERROR 1: TIFFLinkDirectory:Error fetching directory count
ERROR 1: Only read-only mode is supported for /vsicurl
Overview building failed.

I have both read and write access to this bucket and gdalinfo works on the source S3 file.

Cheers
Jeremy

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