[mapguide-users] Calculating map meters per unit without MgCoordinateSystem

[Jason Birch]

Hmm.  Not looking good:

http://trac.osgeo.org/mapguide/browser/trunk/MgDev/Web/src/HttpHandler/HttpResourceStrings.cpp#L338

<http://trac.osgeo.org/mapguide/browser/trunk/MgDev/Web/src/HttpHandler/HttpResourceStrings.cpp#L338>That
seems like a pretty important/useful function to have available though.  I
guess you could extract the units from the WKT and transform yourself, but
that's painful.

I wouldn't be surprised if you find other mismatches in the functionality
between web and client APIs.  I remember DMSG running into this a few times
in initial Fusion development, and I've seen it myself in some of the print
output stuff.

Jason

On 5 November 2010 06:43, Jackie Ng wrote:

[snip]


>  So here's the problem:
>
> The meters-per-unit value is calculated by:
>
> MgCoordinateSystem.ConvertCoordinateSystemUnitsToMeters(1.0) (as seen in
> the
> mapframe.aspx/php/jsp of the AJAX viewer)
>
> Unfortunately, the code being purely client-side (and Maestro API being
> 100%
> managed), I do not have access to the official MapGuide API and thus the
> MgCoordinateSystem class.
>
> So is there a purely managed way to calculate this value?
>
>
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