I guess if we are dealing with distances of 10 miles might that curve
be negligible, right? I only need accuracy within a mile so i could
probably just add and subtract the appropriate minutes...
I am curious as to the answer to the below problem.
On Sep 25, 10:11 pm, This Guy <[EMAIL PROTECTED]> wrote:
> I think this is a great circle calculation, one that googlemaps can
> do. However, in order to sort a large dataset in sql for display I
> need to be able to find four points (n, e, s, w) that are 10 miles
> away from my center point and then find the lat and long for each of
> those points.
>
> that way I can use the lat and long to sort the large dataset before
> doing a radii search...
>
> someone else is doing most of the programing, but I think this is a
> great circle calculation...would I need to put the formula below in on
> some other side or is there a googlemap way to do this.
>
> Dollar to anyone who can help me.
>
> A point {lat,lon} is a distance d out on the tc radial from point 1
> if:
>
> lat=asin(sin(lat1)*cos(d)+cos(lat1)*sin(d)*cos(tc))
> IF (cos(lat)=0)
> lon=lon1 // endpoint a pole
> ELSE
> lon=mod(lon1-asin(sin(tc)*sin(d)/cos(lat))+pi,2*pi)-pi
> ENDIF
--~--~---------~--~----~------------~-------~--~----~
You received this message because you are subscribed to the Google Groups
"Google Maps API" group.
To post to this group, send email to [email protected]
To unsubscribe from this group, send email to [EMAIL PROTECTED]
For more options, visit this group at
http://groups.google.com/group/Google-Maps-API?hl=en
-~----------~----~----~----~------~----~------~--~---
