{
  "name": "is_empty",
  "type": "function",
  "groups": ["GeometryGroup"],
  "description": "Returns TRUE if a geometry is empty (without coordinates), false if the geometry is not empty and NULL if there is no geometry. See also is_empty_or_null.",
  "arguments": [{
    "arg": "geometry",
    "description": "a geometry"
  }],
  "examples": [{
    "expression": "is_empty(geom_from_wkt('LINESTRING(0 0, 1 1, 2 2)'))",
    "returns": "FALSE"
  }, {
    "expression": "is_empty(geom_from_wkt('LINESTRING EMPTY'))",
    "returns": "TRUE"
  }, {
    "expression": "is_empty(geom_from_wkt('POINT(7 4)'))",
    "returns": "FALSE"
  }, {
    "expression": "is_empty(geom_from_wkt('POINT EMPTY'))",
    "returns": "TRUE"
  }],
  "tags": ["empty", "is_empty_or_null", "see", "coordinates", "false"]
}