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Resolutions

Posted: Wed Jul 25, 2007 3:05 am
by kjb
This may be listed somewhere, but what resolution (m/pixel) do the various zoom levels equate to? I'm guessing that zoom level 15 is about 2m/pixel. Is that about right?

Posted: Wed Jul 25, 2007 9:27 am
by Luis Sa
Hi

Here are the formulas used by SBuilder:

Code: Select all

        PixelsPerLatDeg = (2 ^ Zoom) * 256 / 180.0
        PixelsPerMeter = PixelsPerLatDeg / 111330.0#
        PixelsPerLonDeg = Math.Cos(LatDispCenter * PI / 180.0#) * PixelsPerLatDeg
Regards,

Luis