Mongodb : Check if a point is inside a stored polygon

geolocation, mongodb, polygon

Solution

You must store your location data like this schema:

{"loc":
     {"coordinates":[
       [
         [1.0,1.0],
         [1.0,10.0],
         [10.0,10.0],
         [10.0,1.0],
         [1.0,1.0]
       ]
      ],
     "type":"Polygon"
   }
}

and then send `$geoIntersects` queries

db.polygons.find({"loc":{"$geoIntersects":{"$geometry":{"type":"Point", "coordinates":[x, y]}}}}

Problem

I'm new to the mongodb geolocation features. I stored some polygons that represent the country borders in a database along with the country name. Now what i would like to do is checking which country a point is in. For example if i give my own geolocation i would like to get the country where i am. Is there a way to do it with mongodb? Maybe with geoWithin? Thank you

Original source