QGIS/resources/function_help/json/make_polygon

{
  "name": "make_polygon",
  "type": "function",
  "groups": ["GeometryGroup"],
  "description": "Creates a polygon geometry from an outer ring and optional series of inner ring geometries.",
  "variableLenArguments": true,
  "arguments": [{
    "arg": "outerRing",
    "description": "closed line geometry for polygon's outer ring"
  }, {
    "arg": "innerRing1",
    "optional": true,
    "syntaxOnly": true
  }, {
    "arg": "innerRing2",
    "optional": true,
    "syntaxOnly": true
  }, {
    "arg": "innerRing",
    "optional": true,
    "descOnly": true,
    "description": "optional closed line geometry for inner ring"
  }],
  "examples": [{
    "expression": "geom_to_wkt(make_polygon(geom_from_wkt('LINESTRING( 0 0, 0 1, 1 1, 1 0, 0 0 )')))",
    "returns": "'Polygon ((0 0, 0 1, 1 1, 1 0, 0 0))'"
  }, {
    "expression": "geom_to_wkt(make_polygon(geom_from_wkt('LINESTRING( 0 0, 0 1, 1 1, 1 0, 0 0 )'),geom_from_wkt('LINESTRING( 0.1 0.1, 0.1 0.2, 0.2 0.2, 0.2 0.1, 0.1 0.1 )'),geom_from_wkt('LINESTRING( 0.8 0.8, 0.8 0.9, 0.9 0.9, 0.9 0.8, 0.8 0.8 )')))",
    "returns": "'Polygon ((0 0, 0 1, 1 1, 1 0, 0 0),(0.1 0.1, 0.1 0.2, 0.2 0.2, 0.2 0.1, 0.1 0.1),(0.8 0.8, 0.8 0.9, 0.9 0.9, 0.9 0.8, 0.8 0.8))'"
  }],
  "tags": ["outer", "ring", "series", "inner", "optional", "polygon"]
}