一数据结构

use lbs;

db.lbs.insert(
    {
        loc:{
            type: "Point",
            coordinates: [113.332264, 23.156206]
        },
        name: "aaaaaa"
    }
)

db.lbs.insert(
    {
        loc:{
            type: "Point",
            coordinates: [113.330611, 23.147234]
        },
        name: "bbbbb"
    }
)

db.lbs.insert(
    {
        loc:{
            type: "Point",
            coordinates: [113.328095, 23.165376]
        },
        name: "cccccc"
    }
)

二创建索引

db.lbs.ensureIndex(
    {
        loc: "2dsphere"
    }
)

三检索

db.lbs.find(
    {
        loc: {
            $near:{
                $geometry:{
                    type: "Point",
                    coordinates: [113.323568, 23.146436]
                },
                $maxDistance: 1000
            }
        }
    }
)

四平均距离最大距离

db.runCommand({geoNear:"lbs",near:[113.328568, 23.166436],num:10,spherical:true,distanceMultiplier:6378137,maxDistance:5000/6378137})//返回的dis字段为距离

db.lbs.aggregate([
	{
		$geoNear: {
			near: { type: "Point", coordinates: [113.328568, 23.166436] },
			distanceField: "dist", //距离字段单位米
			maxDistance: 5000,
			spherical: true
		}
	},
	{$skip:0},
	{$limit:10},
	{$sort:{"dist":1}} // 1：asc -1：desc
])

上面两种方法返回的距离单位为米。最后一种方法支持分页,支持正反序排列。