• deadbeef79000@lemmy.nz
    5·
    5 days ago

    So, if its borders are straight lines in this projection, are they actually concave curves?

    Edit: convex for the northern border.

    • Dr. Bob@lemmy.caOPEnglish
      3·
      5 days ago

      They follow lines of latitude and longitude so straight lines on a curved surface. It’s slightly untrue on the Eastern border that looks like a jagged edge due to the dominion land survey. But it was meant to be straight.

      • deadbeef79000@lemmy.nz
        2·
        5 days ago

        I suspected/assumed they were ‘true’ to the lines of latitude and longitude.

        The amusing projection in green makes it obvious that the map projection is taking some liberties ;-)

        • Dr. Bob@lemmy.caOPEnglish
          31·
          5 days ago

          If you mean my shitpost worthy work in PowerPoint, you bet. Dammit I’m a doctor not a cartographer deadbeef!

      • Zwiebel@feddit.orgEnglish
        2·
        5 days ago

        No they clearly don’t. It spans about two longitude lines at the bottom and three at the top

        • Dr. Bob@lemmy.caOPEnglish
          2·
          5 days ago

          I know the southern border is the 49th parallel and the northern border is the 60th. I’d have to look up the meridians.

          Eta: the Western border is the 110th meridian. The Eastern one is fucked up because of the Dominion Land Survey.

          Eta2: the Eastern border is ~102nd meridian.