Mr. Mike Williams got it! This is the second time he's saved us. What
a champ! Clearly, I'm not a javascript developer (more the perl type,
really), but this guy...hey, this guy! :P
-G
On Nov 3, 2008, at 7:27 PM, Mike Williams wrote:
>
> I think you'll find that it all works correctly if you use numbers
> instead of strings for your lat and lng variables.
>
> These lines convert the data from Number to String
> document.getElementById('txtLatitude').value = point.y;
> document.getElementById('txtLongitude').value = point.x;
>
> When you pull the data back, you need to convert it back to a Number
>
> createPoint(parseFloat(lat), parseFloat(lng), 3);
>
> Note: Your validateNum() only works with Strings, so don't convert to
> Number before calling that.
>
>
>
> Javascript can perform unambiguous arithmetic on strings that contain
> numeric values, but if you attempt to "+" two such strings it
> considers
> the "+" to represent string concatenation rather than addition.
>
> You can get away with using strings in the Mercator projection most of
> the time, but consider this line in
> PolarProjection.prototype.fromLatLngToPixel
> var lng = this.pole * (Math.PI/180) * (l.lng() + 180);
>
> If "l.lng()" is the string "123.45" then (l.lng() + 180) is
> "123.45180",
> which is not what you want.
>
> --
> http://econym.org.uk/gmap
> The Blackpool Community Church Javascript Team
>
>
> >
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