Jim, you make an excellent point that I hadn'e considered.

However, in my blog entry on the topic, I'm actually doubling the size of
the rectangle for the longitude, so I'm doing

@lat1-(@[EMAIL PROTECTED])

so even though my range factor technically should be larger, I actually
double it anyway, and that compensates for pretty much any different (except
maybe in Alaska, I'll have to check that)

The factor I'm multiplying by is 0.028985507

Northern alaska would be 0.52ish so I suppose I should actually multiply by
4 (4/69) to compensate.

Rick

On 2/6/07, Jim Wright <[EMAIL PROTECTED]> wrote:
>
>
> What calculation did you use to limit the longitude?...if you are using
> the same one as latitude, I'm not understanding...
> Let's take a latitude around the center of our home state of NC...35
> degrees...
> At 35 a degree of longitude is approx 57 miles long
> (per http://www.csgnetwork.com/degreelenllavcalc.html)
>
> 1 degree longitude/57 miles = .017544
> 1 degree latitude/69.172 miles = .014457
>
> ..014457 < .017544
>
> so you would be limiting too much of the longitude if you are only using
> the .014457 number.  Are you doing something different?  Or do I have it
> all wrong?
>
> 

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