Re: An interesting problem: distance estimating

["Matthew Gillen" <user=50@nabble.blu.org>]

 [hidden email] wrote: 
> I've been thinking about an issue: 
> 
> How do you estimate the distance between two points? 
> 
> We all know that geographical "as the crow flies" calculations are wrong 
> with regards to distance of travel. 
> 
> We also can not estimate a truly *real* number without knowing the actual 
> rout and roads taken. 
> 
> So, what do you think would be a practical algorithm for estimating distance?