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This feature adds a 'collect' aggregation method resulting in a single multipart geometry from a list of geometries. This is exposed in the expression engine via the existing aggregate() function, as well as a new collect() function.
14 lines
594 B
Plaintext
14 lines
594 B
Plaintext
{
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"name": "collect",
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"type": "function",
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"description": "Returns the multipart geometry of aggregated geometries from an expression",
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"arguments": [
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{"arg":"expression", "description":"geometry expression to aggregate"},
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{"arg":"group_by", "optional":true, "description":"optional expression to use to group aggregate calculations"},
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{"arg":"filter", "optional":true, "description":"optional expression to use to filter features used to calculate aggregate"}
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],
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"examples": [
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{ "expression":"collect( $geometry )", "returns":"multipart geometry of aggregated geometries"}
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]
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}
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