Fix fetching all altitudes for MultiPolygons
Fix fetching all altitudes for MultiPolygons

RobTwoThree/Monocle,RobTwoThree/Monocle,tallypokemap/Monocle,RobTwoThree/Monocle,evenly-epic-mule/Monocle,DavisPoGo/Monocle,evenly-epic-mule/Monocle,DavisPoGo/Monocle,ZeChrales/Monocle,tallypokemap/Monocle,sebast1219/Monocle,ZeChrales/Monocle,DavisPoGo/Monocle,RobTwoThree/Monocle,sebast1219/Monocle,ZeChrales/Monocle,evenly-epic-mule/Monocle,sebast1219/Monocle,tallypokemap/Monocle