CODEWITHSUNDEEP
mongodb
Andrey
Andrey

Reputation: 137

MongoDB 3.0.4 $nearSphere $maxDistance strange behaviour

I have a question about distance measuring in a $maxDistance. I have document:

{
    "location": {
        { "type" : "Point", "coordinates" : [ 38.8993487, -77.0145665 ] }
    }
}

Making a query in a shell:

db.places.find({"location": {"$nearSphere": {"$geometry": {"type":"Point", "coordinates": [38.888684, -77.0047189]}, "$maxDistance": 1129 } }})[0].location

Returns a

{ "type" : "Point", "coordinates" : [ 38.8993487, -77.0145665 ] }

But distance measurement made by gpsvisualizer.com shows me 1.4600 km. Mongo have a result with maxDistance set to 1129 meters

So my question is - what did I miss ?:D

Upvotes: 0

Views: 160

Answers (1)

Leffchik
Leffchik

Reputation: 2030

I think you missing the fact that mongoDB’s 2d spherical index operators only recognize [longitude, latitude] ordering. Correct link would be: gpsvisualiser. As you can see, distance between those points is about 1,13km :)

Upvotes: 1

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