Google Distance Matrix API?

[evilC]

On a cursory first glance, this code does not appear to use the Google
Distance Matrix API.
I am guessing that this means it uses up many of your searches per day
for each TSP instance - moving to the GDM API would cut this down by a
drastic amount.

Has anyone modded the code to use it?

[Geir Kokkvoll Engdahl]

The quota is per IP, and I never ran into it myself (or had anyone
complain that they've run into it), so I didn't see the need to update
to GDM. I remember looking into it, and there were some issues I can't
quite remember as well (maybe more restrictive quota or something).

Geir

[evilC]

It seems identical - 2,500 elements per day as opposed to 2,500
directions a day, though I could imagine google moving to a more
flexible plan to encourage less requests.
. The wording of the usage limits is a bit different though - if I
were honest, I would take it as meaning that requesting directions for
a route that is not then displayed on a map is a no-no, which I could
understand given the fact that the distance matrix API is provided for
just such a purpose and the directions API is overkill for just a
distance check.