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Virtual Earth Projection
Last Post 10-19-2009 11:26 PM by James. 3 Replies.
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DavidUser is Offline
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07-28-2009 07:58 PM

Hi,

I am still using version 2.55 of the MapSuite Engine - due to the backward incompatibility of MapSuite 3 I haven't been able to move my code over yet as it will take a little while.

I am trying to get my map to overlay the Virtual Earth web service. and am getting somewhere but it is not quite correct. I understand the projection for VE is a Mercator projection? If so then how do I reproject the map to fit VE?

I've had a look in the MapSuiteProjections namespace and there is a Transverse Mercator projection and a Mercator projection?

Which one do I use and how?

If you code show me the code that would be most helpful.

Thanks,

Dave
YaleUser is Offline
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07-30-2009 08:33 PM

 

David,
 
Mercator and Transverse Mercator are two different projections. Both projections are cylindrical and conformal. However, in the Transverse Mercator, the cylinder is rotated 90° (transverse) relative to the equator so that the projected surface is aligned to a central meridian rather than to the equator, as is the case with the Mercator projection.
 
About Transverse Mercator projection see: http://en.wikipedia.org/wiki/Transverse_Mercator
 
In MapSuite 2, MercatorProj corresponds to +proj=merc in proj4
In MapSuite 2, TransverseProj corresponds to +proj=tmerc in proj4
 
So I think you should use the MercatorProj in MapSutie2.0 responding to VE projection.
 
Let me know if you have any more questions.
 
Thanks.
 
Yale
code.thinkgeo.com
GregoryUser is Offline
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10-19-2009 02:25 PM
Just curious - if I'm still using Desktop edition 2.5x in a Windows application and I'd like to use the VE web service, what's the best way to get started?
JamesUser is Offline
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10-19-2009 11:26 PM
Hi Gregory,

Desktop edtion 2x can not support Virtual Earth, so if you want to use VE web service, you're better update to 3x.

Thanks,

James

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