Map projections

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  • Railfan727
    Senior Member
    • Nov 1999
    • 991
    • .

    #1

    Map projections

    Will there be a way to choose from different map projections in OR, or perhaps to even use a true 3D earth?

    One of my biggest complaints of all with MSTS is that the map projection causes "compass" north to differ by about 15 degrees from "north" as shown by the tile boundaries and placement grid. In the part of the country where I live and model, city streets as well as rural country roads are generally laid out on a square north-south/east-west grid system. If roads are placed using GPS coordinates, the result looks like a series of parallelograms rather than a square grid. So I'm forced to make a choice between following the GPS and laying it out to look right visually. But if you're building a railroad that runs north to south, you're forced to go for the most accurate placement over long distances, which means using the GPS and distorting the road grid.

    I'm planning on building an all-new, expanded Conrail Indianapolis Division in Open Rails. But I already see where this map issue is going to bite me right in the rear as I lay out the street grid of Anderson, IN which has tracks running east-west (the Indianapolis Line main) as well as north-south (the Dow Secondary and industrial trackage) across the street grid. I'm going to be forced to either follow the GPS coordinates and distort the square street grid into rhombuses, or go for the best visual effect and have the Dow Secondary be miles off course (and totally out of sync with the surrounding terrain) as it gets farther out from town.
  • conductorchris
    2500 Post Veteran

    • Mar 2010
    • 2905
    • Vermont
    • General

    #2
    I thought Indiana didn't have terrain!
    (Just kidding)

    Comment

    • geekman
      Senior Member
      • May 2010
      • 538
      • Grand Rapids, Michigan

      #3
      Originally posted by conductorchris
      I thought Indiana didn't have terrain!
      (Just kidding)
      Sure it does - flat and flatter! Well, until you get way south, that is!
      Larry Steiner
      Grand Rapids, Michigan

      sigpic

      Comment

      • muskokaandtahoe
        3000 Post Veteran

        • Apr 2003
        • 3003
        • Silicon Valley, CA, USA.
        • ORTS

        #4
        The problem is KUJU chose to use the Goode-Homosoline projection method and given that, so does DEMEX. 1.0; With the DEMEX 1.5 Beta John S. started to experiment with another type of ortho projection, one that wasn't Goode-Homosoline. I used it on my Goose Islands route. I came to realize John had not gotten around to updating his Marker creation function to use the same, new projection and so while the terrain itself is right, the markers land waaaay off. What I would up doing was to convert images out of USAPhotoMaps into .ace files -- not via Mosaic, which applies the skew of the G-H projection, but via my preferred pixel editor.

        So you can get around it... but it is not w/o consequences.
        Dave Nelson
        sigpic
        Seldom visiting, posting less often that that.

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        • twpol
          Senior Member
          • Oct 2009
          • 434
          • United Kingdom

          #5
          I am strongly in favour of us supporting a better projection system, but it's not likely to materialise until we start getting stuck in to the Route Editor tooling, which is a way away still. I don't think there was any consensus on that "better projection" last time we discussed it but there are certainly plenty to choose from.
          James Ross
          Open Rails Management Team
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          • Railfan727
            Senior Member
            • Nov 1999
            • 991
            • .

            #6
            What if the earth were represented in true 3D as it is in Flight Simulator? This would avoid the projection issue entirely...

            Comment

            • Railfan727
              Senior Member
              • Nov 1999
              • 991
              • .

              #7
              Originally posted by geekman
              Sure it does - flat and flatter! Well, until you get way south, that is!
              Which is ideal for 70 mph running!!! And with a grade crossing every mile (at a MINIMUM)... LOTS of horn action!!!!!

              Comment

              • twpol
                Senior Member
                • Oct 2009
                • 434
                • United Kingdom

                #8
                Originally posted by Railfan727
                What if the earth were represented in true 3D as it is in Flight Simulator? This would avoid the projection issue entirely...
                We would still have the problem of cutting up the earth in to reasonable chunks containing bits of the terrain.
                James Ross
                Open Rails Management Team
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