A simple script demonstrating MongoDB's geospatial index support

geo-example.js

/**
 * Example used for "Geographic Data with MongoDB" article at Orlando Data Science.
 * Url: http://orlandods.com/geo-locational-data-mongodb/
 * Author: Pori
 */

var db = new Mongo().getDB('geodb'); 
 
db.places.drop(); // Remove leftover points from previous examples.

db.places.ensureIndex({ loc: '2dsphere' }); // Create a geospatial index for a 2D sphere.

// Insert our examples into the collection!
db.places.insert({ loc: { type: 'Point', coordinates: [2, 2] }}); 
db.places.insert({ loc: { type: 'Point', coordinates: [1, 3] }}); 
db.places.insert({ loc: { type: 'Point', coordinates: [6, 7] }}); 
db.places.insert({ loc: { type: 'Point', coordinates: [9, 11] }}); 
db.places.insert({ loc: { type: 'Point', coordinates: [3, 6] }}); 
db.places.insert({ loc: { type: 'Point', coordinates: [7, 9] }}); 

var box = { type: 'Polygon', coordinates: [[ [0, 0], [3, 0], [3, 3], [0, 3], [0, 0] ]] }; // A geometric figure (box) for detecting the points.
var generalRegion = db.places.find({ loc: { $geoWithin: { $geometry: box }}}); // Search for all points within the bounds of the defined box.
 
print('\nPoints within the box:\n'); 
 
generalRegion.forEach(function(doc) { print(tojson(doc)); }); // Loop through and print the results.