{
  "name": "y_max",
  "type": "function",
  "description": "Returns the maximum y coordinate of a geometry. Calculations are in the spatial reference system of this geometry.",
  "arguments": [ {"arg":"geom","description":"a geometry"}],
  "examples": [ { "expression":"y_max( geom_from_wkt( 'LINESTRING(2 5, 3 6, 4 8)') )", "returns":"8"}
  ]
}