update: after select a community, map will pan to the boundary center
and draw the boundary on the map.

TODO, need a way to parser MuiltPoly ZM(((...)),((...))).
把 首頁的Combobox 從 CommunityBoundary > Community,

然後 做出了下方的樹狀圖, BUT 有 bug, 還需要花時間 重構 + deBug