2020-07-02 15:03:16 +10:00

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{
"name": "geometry_n",
"type": "function",
"groups": ["GeometryGroup"],
"description": "Returns a specific geometry from a geometry collection, or null if the input geometry is not a collection.",
"arguments": [ {"arg":"geometry","description":"geometry collection"},
{"arg":"index","description":"index of geometry to return, where 1 is the first geometry in the collection"} ],
"examples": [ { "expression":"geom_to_wkt(geometry_n(geom_from_wkt('GEOMETRYCOLLECTION(POINT(0 1), POINT(0 0), POINT(1 0), POINT(1 1))'),3))", "returns":"'Point (1 0)'"}]
}