mongodb Calculate distance from coordinates from 5400 documents - mongodb

Question

I have a collection with 5400 documents. I kept data from 1 player during a soccer game. Every second i get the long and lat from the player. Now I want the total distance of the player during the game.
Some idea's ?
This is an example of one document:
{
"_id" : ObjectId("59807a01702661033d918e8e"),
"playerId" : 1,
"timestamp" : ISODate("2017-08-01T11:11:45.078Z")
"loc" : {
"type" : "Point",
"coordinates" : [
4.94193,
51.32447
]
}
}

Answer 1

You can fetch all of the points of the player, calculate the distances between them, and sum the distances up.
For the distance calculation, you can use this algorithm(using php, hope that it's fine)
class Geo
{
const R = 6371000;
/**
* #param float[] $point1 latitude and longitude
* #param float[] $point2 latitude and longitude
* #return float
*/
static public function calculateDistance($point1, $point2)
{
$latRad1 = deg2rad($point1[0]);
$latRad2 = deg2rad($point2[0]);
$deltaLat = deg2rad($point2[0] - $point1[0]);
$deltaLon = deg2rad($point2[1] - $point1[1]);
$a = sin($deltaLat/2) * sin($deltaLat/2) +
cos($latRad1) * cos($latRad2) *
sin($deltaLon/2) * sin($deltaLon/2);
$c = 2 * atan2(sqrt($a), sqrt(1 - $a));
return self::R * $c;
}
}
Hope it's helpfull.