MongoDB 空間定位（點） 與 距離檢索
阿新 • • 發佈：2018-12-09
基於 MongoDB 2.6
GeoJSON 格式
{ "type": "Point", "coordinates": [lon(經度),lat(緯度)]}
測試資料
db.geo.insert({"address" : "南京 祿口國際機場","loc" : { "type": "Point", "coordinates": [118.783799,31.979234]}}) db.geo.insert({"address" : "南京 浦口公園","loc" : { "type": "Point", "coordinates": [118.639523,32.070078]}}) db.geo.insert({"address" : "南京 火車站","loc" : { "type": "Point", "coordinates": [118.803032,32.09248]}}) db.geo.insert({"address" : "南京 新街口","loc" : { "type": "Point", "coordinates": [118.790611,32.047616]}}) db.geo.insert({"address" : "南京 張府園","loc" : { "type": "Point", "coordinates": [118.790427,32.03722]}}) db.geo.insert({"address" : "南京 三山街","loc" : { "type": "Point", "coordinates": [118.788135,32.029064]}}) db.geo.insert({"address" : "南京 中華門","loc" : { "type": "Point", "coordinates": [118.781161,32.013023]}}) db.geo.insert({"address" : "南京 安德門","loc" : { "type": "Point", "coordinates": [118.768964,31.99646]}})
一定要加索引
db.geo.createIndex( { loc : "2dsphere" } )檢索規定半徑以內資料（單位為米）
db.geo.find({loc:{$near: {$geometry: {type: "Point" ,coordinates: [118.783799,31.979234]},$maxDistance: 5000}}})