[gdal-dev] How to read ElasticSearch filters from file?

[Even Rouault]

> 
> Which one should win if -spat and -where @... are both feeding a spatial
> filter? Should it be "either-or", or "both" as a combined filter with AND
> in between?

This is driver specific.
* For MongoDB, the -spat and -where filters are combined with a AND, which is I 
guess the more logical behaviour.
* For ES, if -where is specified, -spat is ignored. This is mainly because it 
looked technically harder to create a valid combined filter. Could perhaps be 
improved. I dunno. This behaviour is at least documented in the driver doc 
page.

> 
> -Jukka Rahkonen-
> 
> 
> 
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