It's AT&T's coordinate sysstem for billing LD calls. So you must either
have switch locations or rate centers. Cartographic coordinate systems are
not something I'm strong on, but basically it is a conversion so that you
can use the Pythagorean Theorem to easily calculate distance between two
points. It's good for Continental US and Southern Canada. But for Alaska,
Hawaii, and I suspect N. Canada, the conversion is inaccurate. By no
means is the accuracy of any location at the street level.
I had planned (am planning?) on writing a MapBasic program to convert V & H
to Lat & Long, so I have a bit of code I found on the web w.r.t. the
conversion. Be happy to pass it along, but an easier solution is
available. Telcordia (aka BellCore) sells a small app that converts it to
Lat and Long.
T
At 11:06 AM 7/30/99 -0600, you wrote:
>Hello all,
>
> I have recieved a file that has two columns one called V_coordinates
>and one Called H_coordinates across Canada I have no idea as to what
>coordinate system this is in
>
>eg.
>
>v cordinate
>4,239
>h coordinate
>2,160
>
>
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