How can you calculate and display the distance to a point on the map?

Question

JavaScript

Good, there is an example on the site restoran.ru
where distances to establishments are displayed, are there ready-made solutions for such an implementation, if not dynamic (from the current location), then at least from a certain, predetermined point? The coordinates of the points are available through Yandex api, you need to calculate the distance to them .. Thank you

Answer 1

If without API, only by coordinates, there is a library
https://github.com/turfjs

Answer 2

Give you all a ready-made lib for every sneeze ...
We read the theory here: https://ru.wikipedia.org/wiki/%D0%A2%D0%B5%D0%BE%D...

function distantion(x1, y1, x2, y2) {
  return Math.sqrt(Math.pow(x2 - x1, 2) + Math.pow(y2 - y1, 2));
}

Answer 3

What exactly do you need - the distance between two points on the map (which is a straight line and passes through yards / gardens / houses / other), or an adequate distance on the roads?
If the former, then Dmitry Belyaev gave the correct answer.
If the latter, you need to build a weighted digraph and look for paths from one vertex to another on it. More details (theory, algorithms, without reference to practice) - in this article https://habrahabr.ru/post/119158/

Answer 4

Google distance matrix for example: https://developers.google.com/maps/documentation/d...