Hi,
A few questions (and possibly feature suggestions?)
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How is the indexing of geoshapes different from geo-points behind the scenes? is the geoshape not mapped to many geohashes as the geopoint is mapped to a single one?
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Why is the geohash_grid aggregation applicable only for geopoints?
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Similarly to the murmur3 hashing by adding an inner field in the mapping, why not allow for access to the geohash itself by the same means?