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我想用这个链接导出我的等时线：http://localhost:8080/otp/routers/npdc/isochrone?fromPlace=50.44748389174579,2.973716363690387&mode=WALK,TRANSIT&date=09-14-2021&time=8:00am&maxWalkDistance=500&cutoffSec=1800&cutoffSec=3600 但没有任何反应，没有下载。你有什么想法 ？

这是JAVA返回给我的内容：

{"type":"FeatureCollection","crs":{"type":"name","properties":{"name":"EPSG:4326"}},"features":[{"type":" Feature","geometry":{"type":"MultiPolygon","coordinates":[[[[2.9697,50.4475],[2.9699,50.4469],[2.9703,50.4457],[2.9702,50.4453],[2.9701, 50.4439],[2.9703,50.4435],[2.9709,50.4428],[2.9717,50.4426],[2.9737,50.4427],[2.9748,50.4428],[2.9765,50.4429],[2.9765,50.4429],[2.9786,509,450.449],4786,509,450.9. ,[2.9803,50.4457],[2.98,50.4461],[2.9794,50.4467],[2.9782,50.4468],[2.9783,50.4475],[2.9773,50.448],[2.9765,50.4491],[2.976,50] 2.9763,50.4493],[2.9765,50.4494],[2.9784,50.4511],[2.9775,50.4517],[2.9765,50.4523],[2.9738,50.4511],[2.9737,50.4501],[2.9725],[2.9725.9,1] 50.4502],[2.9705,50.4493],[2.9703,50.4489],[2.9697,50.4475]]]]},"properties":{"time":3600},"id":"fid--60d73e63_17be43c1e35_-7ff7"},{"type":"Feature","geometry":{"类型":"多多边形","坐标":[[[[2.9697,50.4475],[2.9699,50.4469],[2.9703,50.4457],[2.9702,50.4453],[2.9701,50.4439],[2.9703,50.4435], [2.9709,50.4428],[2.9717,50.4426],[2.9737,50.4427],[2.9748,50.4428],[2.9765,50.4429],[2.9786,50.4439],[2.9794,50.4445],[2.9803.945],[2.9803.945] ,50.4461],[2.9794,50.4467],[2.9782,50.4468],[2.9783,50.4475],[2.9773,50.448],[2.9765,50.4491],[2.976,50.4489],[2.9763,50.450.4],[2.9763,50.450.6] ],[2.9784,50.4511],[2.9775,50.4517],[2.9765,50.4523],[2.9738,50.4511],[2.9737,50.4511],[2.9735,50.4511],[2.9709,50.4502],[493],7.4 [2.9703,50.4489],[2.9697,50.4475]]]]},"属性":{"时间":1800},"id":"fid--60d73e63_17be43c1e35_-7ff8"}]}

在我的电脑控制台中：

14:47:37.640 INFO (SPTWalker.java:156) SPTWalker：从 12889 个顶点/33044 个状态生成 65719 个点（0 个重复边，0 个无几何图形）。14:47:37.641 INFO (AccumulativeGridSampler.java:139) 添加了 411 个结束样本，总共 748 个。 14:47:37.641 INFO (SampleGridRenderer.java:89) 在 52 毫秒内计算 SPT，采样时间为 27 毫秒（总共 79 毫秒） 14:47:37.643 INFO (IsoChroneSPTRendererAccSampling.java:101) 在 2 毫秒内计算 2 个等时线

谢谢 ！祝你今天过得愉快，

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