Windows phone getting nearby latitude and longitude within 6 Kilometer based on my lat and long

Question

people with the same app, register their location every time they open the app, people that register the location within a 6 Kilometers can see each other based on what my app does. I'm not using a map, just lat and long values, but its okay for a demo, so is there any algorithm that can do this ? please help me ! thanks.

Answer 1

A little while ago this would have involved a lot of trigonometry. With the latest version of .NET however you can use the GeoCoordinate.GetDistanceTo() method.

double distance = myLocation.GetDistanceTo(yourLocation); // metres