Mongodb合并Polygon
假如每个省为一个多边形(Polygon),[[
[113.314882,23.163055],
[113.355845,23.167042],
[113.370289,23.149564],
[113.356779,23.129758],
[113.338238,23.13913],
[113.330979,23.124706],
[113.313588,23.140858],
[113.323865,23.158204],
[113.314882,23.163055],
]]
,现在想把若干个省合成一个多边形,即将多个多边形拼接成一个多边形,只取外面的度坐标,请问Mongodb的sql脚本如何写?谢谢!