九段线
中国南海九段线数据（又称十段线，下方数据中为十段线数据）。
数据
{
"type": "Feature",
"properties": {
"name": "十段线",
"name_en": "Nine-dash_line"
},
"geometry": {
"type": "MultiLineString",
"coordinates": [
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[109.96506402665503, 15.526031073258686],
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],
[
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],
[
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