• It allows you to efficiently execute spatial queries on a collection that contains geospatial shapes and points.
• It was created by two fields, specify the location field first, then the second field.
• In MongoDB, it has two types 2dsphere and 2d.
• Indexes work with spherical geometries that model the surface of the earth based on the WGS84 datum is 2dsphere.
• In this model, the surface of the earth is an oblate spheroid, meaning that there is some flattening at the poles.
• Indexes for points stored on a two-dimensional plane is 2d.
• In GeoJSON format 2dsphere allows you to specify geometries for points, lines, and polygons.
• A point is given by a two-element array, representing [longitude, latitude].

For example,

                                   {
                                          "name" : "New York City",
                                          "loc" : {
                                                 "type" : "Point",
                                                 "coordinates" : [50, 2]
                                        }
                                  }

A line is given by an array of points:

For example,

{
                            "name" : "Hudson River",
                            "loc" : {
                                  "type" : "LineString",
                                  "coordinates" : [[0,1], [0,2], [1,2]]
                           }
                      }