> That probably means your approach is flawed.  Why do you need all 5
> million distances in advance?  Can you calculate them only when
> required?  

Yes I could do that of course, but saving distances in my database
will avoid querying Google each time I want to show a distance. I get
the distance from user_address to specific_location and save it on
local database. Next time I want to get the distance info, I will use
my database instead of asking Google maps. Faster (for my visitors)
and less stress on Google servers.


> Will a straight line approximation be good enough for many
> purposes (its easy to calculate that)?  

Absolutely not, a straight line wont work to get "real" distances
between 2 points (unless you want to show flight distance to fly from
A to B). Mountains, lakes, rivers, ... too many things can alter the
distance and make it differ a lot from a straight line. is regarded as
a valuable commercial asset.

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