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Orthographic Projection

This is a discussion on Orthographic Projection within the MapPoint Desktop Discussion forums, part of the Map Forums category; Hi Friends I need to implement orthographic Projection over an image generated by Mappoint webservice. I am using the equations ...

  1. #1
    bramu is offline Junior Member Yellow Belt
    Join Date
    Mar 2007
    Posts
    13

    Orthographic Projection

    Hi Friends

    I need to implement orthographic Projection over an image generated by Mappoint webservice.

    I am using the equations found on
    Orthographic projection (cartography) - Wikipedia, the free encyclopedia

    but it seems that it is not working. My first question is what is the value of the earth radius to be used in these equations? Must it be in m, km or other units?

    any help is really appreciated.

    regards

  2. #2
    Dazzer is offline Senior Member Green Belt
    Join Date
    Sep 2003
    Posts
    103

    Re: Orthographic Projection

    Im not sure of the answer to your question but I looked at this a while ago and come across this very usefull bit of code

    Developing map projections with Java, the orthographic map projection

    Its in Java but shouldn't be too hard to translate the useful bits into the language of your choice.

  3. #3
    bramu is offline Junior Member Yellow Belt
    Join Date
    Mar 2007
    Posts
    13

    Re: Orthographic Projection

    Thx, but what value I need to assign for R ?

    Regards

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