{"id":1381,"date":"2017-10-24T15:57:57","date_gmt":"2017-10-24T07:57:57","guid":{"rendered":"https:\/\/yanjingang.com\/blog\/?p=1381"},"modified":"2017-12-28T23:26:59","modified_gmt":"2017-12-28T15:26:59","slug":"mongodb%e9%80%9a%e8%bf%87geonear%e8%bf%9b%e8%a1%8c%e5%9d%90%e6%a0%87%e6%a3%80%e7%b4%a2%e7%a4%ba%e4%be%8b","status":"publish","type":"post","link":"https:\/\/yanjingang.com\/blog\/?p=1381","title":{"rendered":"mongodb\u901a\u8fc7$geoNear\u8fdb\u884c\u5750\u6807\u68c0\u7d22"},"content":{"rendered":"

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\/\/1.\u5efa\u7acbgeo\u7d22\u5f15\r\ndb.point.ensureIndex({\"geo\":\"2d\"});\r\n\/\/\"geo\"\u683c\u5f0f\u8bf4\u660e\uff1a\r\n[\r\n  116.279943 #lng\u7ecf\u5ea6\r\n\u00a0 40.049971, #lat\u7eac\u5ea6\r\n]\r\n\r\n\/\/2.\u63d2\u5165\u793a\u4f8b\u6570\u636e\r\ndb.point.insert({ \"@id\" : 1, \"@geo\" : [ 116.305297, 40.041993 ], \"@bucket\":[\"\u7a3b\u9999\u6751\"], \"@bucket_sign\":[\"19d40bb2165c198560278e7bc3b2c5e5\"] ,\"name\":\"\u7a3b\u9999\u6751\u4e0a\u5730\u5e97\"})\r\ndb.point.insert({ \"@id\" : 2, \"@geo\" : [ 116.305306, 40.041995 ], \"@bucket\":[\"\u7a3b\u9999\u6751\"], \"@bucket_sign\":[\"19d40bb2165c198560278e7bc3b2c5e5\"] ,\"name\":\"\u7a3b\u9999\u6751\u897f\u4e8c\u65d7\u5e97\" })\r\ndb.point.insert({ \"@id\" : 3, \"@geo\" : [ 116.305309, 40.041993 ], \"@bucket\":[\"\u6d77\u5e95\u635e\"], \"@bucket_sign\":[\"f6c832afc1c578ee731273c14a0245b4\"] ,\"name\":\"\u6d77\u5e95\u635e\u897f\u4e8c\u65d7\u5e97\" })\r\ndb.point.insert({ \"@id\" : 4, \"@geo\" : [ 116.279943,40.049971 ], \"@bucket\":[\"\u6d77\u5e95\u635e\"], \"@bucket_sign\":[\"f6c832afc1c578ee731273c14a0245b4\"] ,\"name\":\"\u6d77\u5e95\u635e\u4e0a\u5730\u5e97\" })\r\ndb.point.insert({ \"@id\" : 5, \"@geo\" : [ 116.225901,39.773136 ], \"@bucket\":[\"\u6d77\u5e95\u635e\"], \"@bucket_sign\":[\"f6c832afc1c578ee731273c14a0245b4\"] ,\"name\":\"\u6d77\u5e95\u635e\u623f\u5c71\u957f\u9633\u5e97\" })\r\n\r\n\r\n\/\/3.\u67e5\u8be2\u9644\u8fd11\u516c\u91cc\u7684\u70b9\u793a\u4f8b\uff1a\r\n\r\n1)find\u6807\u51c6\u67e5\u8be2\uff08\u4ec5mongodb2.x\u7248\u672c\u652f\u6301\uff0c\u4e0d\u80fd\u8fd4\u56de\u8ddd\u79bb\uff09\r\ndb.point.find({\"geo \":{ $near : [<\/code>116.279943,40.049971] , $maxDistance : 1\/111.12},\"@bucket_sign\" : [ \"f6c832afc1c578ee731273c14a0245b4\"}) \u8fd4\u56de\u683c\u5f0f\uff1a { \"_id\" : ObjectId(\"59f8418c278994d6d2e77c9a\"), \"@id\" : 4, \"@geo\" : [ 116.279943, 40.049971 ], \"@bucket\" : [ \"\u6d77\u5e95\u635e\" ], \"@bucket_sign\" : [ \"f6c832afc1c578ee731273c14a0245b4\" ], \"name\" : \"\u6d77\u5e95\u635e\u4e0a\u5730\u5e97\", \"dist\" : { \"calculated\" : 0, \"location\" : [ 116.279943, 40.049971 ] } } { \"_id\" : ObjectId(\"59f8418c278994d6d2e77c99\"), \"@id\" : 3, \"@geo\" : [ 116.305309, 40.041993 ], \"@bucket\" : [ \"\u6d77\u5e95\u635e\" ], \"@bucket_sign\" : [ \"f6c832afc1c578ee731273c14a0245b4\" ], \"name\" : \"\u6d77\u5e95\u635e\u897f\u4e8c\u65d7\u5e97\", \"dist\" : { \"calculated\" : 2.33435844594686, \"location\" : [ 116.305309, 40.041993 ] } } { \"_id\" : ObjectId(\"59f8418c278994d6d2e77c9b\"), \"@id\" : 5, \"@geo\" : [ 116.225901, 39.773136 ], \"@bucket\" : [ \"\u6d77\u5e95\u635e\" ], \"@bucket_sign\" : [ \"f6c832afc1c578ee731273c14a0245b4\" ], \"name\" : \"\u6d77\u5e95\u635e\u623f\u5c71\u957f\u9633\u5e97\", \"dist\" : { \"calculated\" : 31.12581912580905, \"location\" : [ 116.225901, 39.773136 ] } } 2)aggregate\u805a\u5408\u67e5\u8be2 \u8fd4\u56de\u683c\u5f0f\u4e0efind\u76f8\u540c\u3002\u53c2\u6570\u4e2d$maxDistance\u4e3a\u7ecf\u7eac\u5f27\u5ea6\uff081\u00b0 latitude = 111.12 kilometers\uff09\u5373 1\/111.12\uff0c\u8868>\u793a\u67e5\u627e\u9644\u8fd1\u4e00\u516c\u91cc\u3002 db.point.aggregate([{$geoNear:{near:[116.279943,40.049971],distanceField: \"dist.calculated\",maxDistance: 100\/111.12,query:{\"@bucket_sign\":\"f6c832afc1c578ee731273c14a0245b4\"},includeLocs: \"dist.location\",uniqueDocs: true,num: 5,spherical:true,\"distanceMultiplier\": 6371}}]) \u8fd4\u56de\u540c1)find\u683c\u5f0f\r\n\r\n\r\n3)runCommand\u547d\u4ee4\u65b9\u5f0f \r\ndb.runCommand({geoNear:\"point\",near:[116.305207,40.042053 ], maxDistance : 1\/111.12,query: { \"@bucket\":\"\u6d77\u5e95\u635e\" }}) \r\n\r\n\u8fd4\u56de\u683c\u5f0f\uff1a\r\n { \"ns\" : \"point\", \"near\" : \"\", \"results\" : [ { \"dis\" : 0.0001138771267725113, \"obj\" : { \"_id\" : ObjectId(\"59eeeed3b5fbf3fa598cd4b0\"), \"@id\" : 4, \"@geo\" : [ 40.041995, 116.305305 ], \"@bucket\" : [ \"\u6d77\u5e95\u635e\" ], \"@bucket_sign\" : [ \"f6c832afc1c578ee731273c14a0245b4\" ], \"name\" : \"\u6d77\u5e95\u635e\u897f\u5317\u65fa\u5e97\" } }, { \"dis\" : 0.00011833849754085601, \"obj\" : { \"_id\" : ObjectId(\"59eeeed3b5fbf3fa598cd4af\"), \"@id\" : 3, \"@geo\" : [ 40.041993, 116.305309 ], \"@bucket\" : [ \"\u6d77\u5e95\u635e\" ], \"@bucket_sign\" : [ \"f6c832afc1c578ee731273c14a0245b4\" ], \"name\" : \"\u6d77\u5e95\u635e\u897f\u4e8c\u65d7\u5e97\" } } ], \"stats\" : { \"time\" : 2, \"btreelocs\" : 0, \"nscanned\" : 19, \"objectsLoaded\" : 10, \"avgDistance\" : 0.00011610781215668365, \"maxDistance\" : 0.00011833849754085601, \"shards\" : [ \"ucp_shard_14\", \"ucp_shard_3\", \"ucp_shard_8\" ] }, \"ok\" : 1 } <\/code><\/pre>\n
\u6ce81\uff1amongodb3.x\u7248\u672c\u7684\u4e24\u79cdgeoNear\u67e5\u8be2\u65b9\u5f0f\u90fd\u652f\u6301\u8fd4\u56de\u8ddd\u79bb\u5e76\u6309\u8ddd\u79bb\u6b63\u5e8f\u6392\u5e8f\u3002<\/p>\n
\u6ce82\uff1a\u4f7f\u7528geoNear\u83b7\u5f97\u7684\u7ed3\u679c\u91ccdis\u7684\u5355\u4f4d\uff0c\u6709\u4e24\u79cd\u60c5\u51b5\uff1a<\/p>\n
1\uff09spherical\u8bbe\u4e3afalse\uff08\u9ed8\u8ba4\uff09\uff0cdis\u7684\u5355\u4f4d\u4e0e\u5750\u6807\u7684\u5355\u4f4d\u4fdd\u6301\u4e00\u81f4
\n\u5982\u679c\u4fdd\u5b58\u7684\u662flongitude\/latitude\uff0c\u5219dis\u7684\u5355\u4f4d\u5c31\u662f\u7ecf\u5ea6\uff08\u6216\u8005\u7eac\u5ea6\uff0c\u5355\u4f4d\u662f\u4e00\u81f4\u7684\uff09
\n\u5982\u679c\u4fdd\u5b58\u7684\u662fmeter\uff0c\u5219dis\u7684\u5355\u4f4d\u5c31\u662fmeter<\/p>\n
2\uff09spherical\u8bbe\u4e3atrue\uff0cdis\u7684\u5355\u4f4d\u662f\u5f27\u5ea6<\/p>\n
\u60f3\u8981\u6362\u7b97\u6210\u516c\u91cc\uff08km\uff09\u7684\u8bdd\uff0c
\n\u8981\u4e48\u5728\u7a0b\u5e8f\u91cc\u505a\uff0c\u8981\u4e48\u4f7f\u7528distanceMultiplier\u53c2\u6570\u6765\u5b9a\u4e49\u8f6c\u6362\u65b9\u5f0f\uff1a<\/p>\n
\u5bf9\u5e94\u4e8e1\uff09
\n\u5982\u679c\u8981\u4fdd\u5b58\u7684\u5750\u6807\u662f\u7ecf\u7eac\u5ea6\uff0c\u8981\u8ba1\u7b97\u7684\u662f\u516c\u91cc\uff0c\u53ef\u8bbe\u7f6e distanceMultiplier: 111
\n\u5982\u679c\u8981\u8ba1\u7b97\u82f1\u91cc\uff0c\u53ef\u5c06111\u6362\u621069<\/p>\n
\u5bf9\u5e94\u4e8e2\uff09
\n\u5982\u679c\u8981\u8ba1\u7b97\u516c\u91cc\uff0c\u53ef\u8bbe\u7f6e distanceMultiplier: 6371
\n\u5982\u679c\u8981\u8ba1\u7b97\u82f1\u91cc\uff0c\u5219\u9700\u8981\u628a6371\u6362\u62103959<\/p>\n
 <\/p>\n
yan 17.10.24<\/p>\n
\u53c2\u8003\uff1a<\/span><\/p>\n
http:\/\/www.cnblogs.com\/shanyou\/p\/3494854.html<\/span><\/p>\n
http:\/\/www.dewen.net.cn\/q\/7412<\/span><\/p>\n","protected":false},"excerpt":{"rendered":"
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