I am trying to cluster 5m points stored in mongoDB. Maximum result from 1 query is currently just around 1m so I have decided to use: PruneCluster for first visuals. Points are stored as geoJSON object and there is an 2dsphere index on them.
I connect to mongodb using native node.js driver and query to find points within a polygon, that will only return loc field from the collection and route result for preview:
router.get('/map', function(resq,res) {
var MongoClient = mongodb.MongoClient;
var url = 'mongodb://localhost:27017/airboost';
MongoClient.connect(url, function(err, db) {
if(err){
console.log('Unable to connect to db ', err);
} else {
console.log('Connected!!!');
var collection = db.collection('listingsF');
collection.find({
loc: {
$geoWithin: {
$geometry: {
type : "Polygon" ,
coordinates: [[[121.48521363894814,31.41360430073249],[...],[121.48865692654915,31.41168940543709]]]
}
}
}
},{loc:1}).toArray(function(err, result){
if (err) {
res.send(err);
} else if (result.length) {
res.send(result);
} else {
res.send('Nothing found');
}
db.close();
});
}
});
});
I get a list of objects like this:
[
{
"_id": "567f972bad55ac0797baa75b",
"loc": {
"type": "Point",
"coordinates": [
-85.84556526181,
10.29620625503
]
}
},
{
"_id": "567f972bad55ac0797baa75c",
"loc": {
"type": "Point",
"coordinates": [
-54.943878777465,
-34.964002797642
]
}
}
]
Then I need to pass that result somehow to function in script from /public folder, So I can display the cluster on leaflet map:
var pruneCluster = new PruneClusterForLeaflet();
...
var marker = new PruneCluster.Marker(latitude, longitude);
pruneCluster.RegisterMarker(marker);
...
leafletMap.addLayer(pruneCluster);
I can print content with jade anyway I want, but have no idea how to pass all that mongodb data as Markers to PruneCluster. I don't need full code just a point to a direction. Can someone help me?
