CODEWITHSUNDEEP
node.jsmongodbexpressmongoose
SuperMonteiro
SuperMonteiro

Reputation: 65

nodejs and mongodb: how model a geolocation?

I'm developing an API to store locations, including their coordinates, but I have no idea to model those. Should i go with 

latitude: { 
 type: Float 
},
longitude: {
 type: Float 
},

or is there a way of modeling them as an array, like [43.95 , -26.75]? I want later to filter them distance.

Upvotes: 2

Views: 3163

Answers (3)

Abhishek Singh
Abhishek Singh

Reputation: 409

recently I worked on geo-location things, I think I can answer your question, its too late but may be this help others who is looking for solution.

location: {
  type: {
    type: String,
    default: 'Point',
  },
  coordinates: [Number], // [22.2475, 14.2547]  [longitude, latitude]
};

in above manner we have to introduce this attribute in our schema definition. Then we need to create a 2dsphere index in our collection like below: -

db.collection.createIndex( { location : "2dsphere" } )

that's it, now you are open to fire a query, based on location

db.collection.aggregate([
        {
          $geoNear: {
            near: {
                type: 'Point',
                coordinates: [22.4568, 14.5412],        
            },
            key: 'location',
            distanceField: 'distance', // in meter
            spherical: true,
          },
        }
        ])

Upvotes: 5

Webdev
Webdev

Reputation: 647

Best is to store them as GeoJSOn data , Then it is easy to query by apping a 2dsphere index.

One example of this type of storage is :-

"geolocation" : {
         "type":"Point",
         "coords":[-71.1410879999999960,42.4051060000000040]      
    }

The schema format :-

geolocation: {
    type: { type: String },
    coordinates: [Number],
}

Upvotes: 1

Kayvan Mazaheri
Kayvan Mazaheri

Reputation: 2597

Use MongoDB's Geospatial Data

In MongoDB, you can store geospatial data as GeoJSON objects or as legacy coordinate pairs.

Then you can use Geospatial Queries.

Upvotes: 2

Related Questions