QGIS/resources/function_help/json/point_on_surface

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{
"name": "point_on_surface",
"type": "function",
"description": "Returns a point guaranteed to lie on the surface of a geometry.",
"arguments": [ {"arg":"geom","description":"a geometry"}],
"examples": [ { "expression":"point_on_surface($geometry)", "returns":"a point geometry"}]
}