Mercator style world map of Jerion

Hi Everyone :)

Following on from Ralf's recent Live Mapping session covering the use of the Mercator style from the first ever Cartographer's Annual, I decided to take a couple of days break to make my own Mercator map.

I hope you like it :)


QuentenRalfMonsenBlackYetiTheschabijmabbottShessarDoubleDoubleWeathermanSwedenDaltonSpenceand 2 others.
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Comments

  • Very nice!

    Did you carry over the landforms from FT3?

  • LoopysueLoopysue 🖼️ 26 images Cartographer ProFantasy
    edited April 21

    Thank you :)

    Yes. Jerion is a world I created as an example map for another annual some time ago - 2019, I think. CA155 - The One Day Worldbuilder.

    This is the original FT3 file showing one of the two hemispheres. The trick is to use an Orthographic projection and do each side separately, using the projection settings to get it spot on.


  • jslaytonjslayton Mapmaker Moderator, ProFantasy
    edited April 21

    Fractal Terrains-->Annual #1 Mercator — ProFantasy Community Forum might be of interest as well. Orthographic has a bit of distortion around the edges that won't quite match up on the Stereographic projection.

    MonsenLoopysue
  • LoopysueLoopysue 🖼️ 26 images Cartographer ProFantasy
    edited April 21

    @jslayton ah ha! Is that what it was.

    Well, I've done the maps now, but at least I know for next time - thanks :)

    Thanks - that worked. I can't seem to turn it for a better fit, though. How do you do that?


  • jslaytonjslayton Mapmaker Moderator, ProFantasy

    The composite projections have the major limitation that you have to put the center of projection in each segment. In this case it would be the -90 and 90 after the projection name. I think this request is on my bug list, but I'll note it again to be sure.

    Loopysue
  • LoopysueLoopysue 🖼️ 26 images Cartographer ProFantasy

    Thank you :)

  • @jslayton, what about the AE hemispheres projection available in FT3?

  • jslaytonjslayton Mapmaker Moderator, ProFantasy

    The forum post I referenced above is the AE Hemispheres definition. Depending on your FT version, it may or may not be present in the Projections.txt file.

  • Sorry, Joe. I meant is it better than 2 orthographic spheres?

  • LoopysueLoopysue 🖼️ 26 images Cartographer ProFantasy

    It appears I already had the AE Hemispheres definition! Sorry, Joe. I think I must have been mislead by hearing the Orthographic projection was the way to do it somewhere else.

    I will leave the map as it is now that it's done.

    At least I have learned to be confident in adding any new projections that come along.

  • jslaytonjslayton Mapmaker Moderator, ProFantasy

    I can never remember when that projection got added to the list. As for whether it's "better" than the orthographic one, the best way to answer that is to look at the grid for the projections:


    Azimuthal Equidistant is a pretty good match for the grid on the CC3+ template, while Orthographic really isn't. But the AE Hemispheres definition isn't quite right. A better fit is to use the stereographic projection as shown in the bottom images.

    //---------------------------------------------------------------------------
    
    Projection 93, "Mercator Hemispheres"
    
    Scale 1.0
    Description "Stereographic Hemispheres"
    
    Segment "Stereographic", 0, -90, 0, 0, 1, 0, 0
    scale 0.5, 0.5
    Offset -0.5, 0.0
    Effective -180, 90, 0, -90
    Rotate 0
    EndSegment
    
    Segment "Stereographic", 0, 90, 0, 0, 1, 0, 0
    scale 0.5, 0.5
    Offset 0.5, 0.0
    Effective 0, 90, 180, -90
    Rotate 0
    EndSegment
    
    EndProjection
    
    //---------------------------------------------------------------------------
    


    MonsenLoopysueQuenten
  • LoopysueLoopysue 🖼️ 26 images Cartographer ProFantasy

    Oooo thank you Joe!

    That's another one I'll be adding ASAP!

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