converting from lng/lat to meters

[Puneet Kishor]

Perhaps a really basic question --

How do I convert something like

[
[-122.184, 39.813],
[-116.999, 40.951],
[-111.550, 45.186],
[-103.903, 45.863]
]

to meters using `d3.geo.mercator()` and also calculate distance in meters between each (n, n + 1) pairs of points?




--
Puneet Kishor

[Mike Bostock]

You don't need a project (such as mercator) to compute distance; use
d3.geo.greatArc, which has a distance method. This returns the
distance in radians, but you can multiply by the radius of the Earth
in meters (6,378,100) to get the distance in meters.

Mike