Windy Community
    • Unread
    • Categories
    • Groups
    • Go to windy.com
    • Register
    • Login

    Map projections

    Your Feedback and Suggestions
    5
    7
    957
    Loading More Posts
    • Oldest to Newest
    • Newest to Oldest
    • Most Votes
    Reply
    • Reply as topic
    Log in to reply
    This topic has been deleted. Only users with topic management privileges can see it.
    • P
      per 0 | Premium
      last edited by

      For us living in Scandinavia the lat-long Plate Carrée map projection isn't always very suitable. Todays Swedish radar echoes, for instance, look very distorted and confusing.

      So I'd like to suggest a choice of (a few) other projections, for at high northern latitudes Polar Stereographic at 60°N is the useful standard.

      I've worked at ECMWF in Reading for more than 20 years and I am very impressed and happy for everything you provide. But a polar stereographic alternative would make me even happier.

      Hjo, Sweden 28 September

      Per Kållberg
      meteorologist (retired)

      idefix37I vsinceacV 2 Replies Last reply Reply Quote 1
      • idefix37I
        idefix37 Sailor Moderator @per 0
        last edited by idefix37

        @per-0
        As now Windy offers the ‘3D’ feature (only available on website), you still consider that a stereographic map is needed? Radar and Satellite view is not yet available indeed with the ‘3D’ map but could be soon.
        As said here, ‘The missing features and elements will be gradually implemented in next development phases’

        Gkikas LGPZG P 2 Replies Last reply Reply Quote 0
        • Gkikas LGPZG
          Gkikas LGPZ Moderator @idefix37
          last edited by

          @idefix37
          I think Per asks for radar imagery.

          1 Reply Last reply Reply Quote 0
          • vsinceacV
            vsinceac @per 0 | Premium
            last edited by vsinceac

            Windy 2D maps don't use "lat-long Plate Carrée map projection", they use map projection EPSG:3857 (aka. Pseudo-Mercator, Spherical Mercator, EPSG:900913 or yet Gogol Maps), which is de facto the standard map projection for the majority of web applications (at least since Gogol Maps exist). On high latitudes up to 85.06° (e.g. over Scandinavia), Gogol map projection gets less distorsions than map pseudo-projection EPSG:4326 (screenshots below).

            Of course 3D maps get yet less distorsions on screens than Gogol Maps projection; this is the reason Gogol Maps web site has introduced a couple of years ago 3D maps as default. 3D maps require more resources on both back-end and front-end sides (Gogol can afford to do so anyway :o). Last but not least: not all devices have good performances when rendering 3D maps...

            On the other hand, it would be hard for a web mapping application like WIndy - worlwide coverage weather maps provided to large public - to allow map projections with limited coverage (like Polar Sterographic map projections); they are generally implemented by National Weather applications, which only provide maps with reduced coverage.

            391ecb6f-6ce6-403a-89a8-ffde50ace2ce-image.png

            ¯\_(ツ)_/¯

            1 Reply Last reply Reply Quote 0
            • P
              per 0 @idefix37 | Premium
              last edited by

              @idefix37
              Thanks for the reply to my wish for other map projections. I apologise for erroneously mentioning lat-long projection but Mercator is of course even worse in distorting high latitudes.
              And I shouldn't have mentioned the radar imagery, my real interest is the circumpolar atmospheric circulation with its Rossby waves. They are of great interest not the least in connexion with present climate trends. ECMWF on their own website present excellent "Actic" and "Antarctic " polar stereographic maps.

              What is meant by 3D maps ? I have not been able to find one as Prime user.

              Best regards

              Per Kållberg Hjo Sweden

              idefix37I C 2 Replies Last reply Reply Quote 0
              • idefix37I
                idefix37 Sailor Moderator @per 0
                last edited by idefix37

                @per-0
                I guess you use Windy on desktop (3D is not available in the mobile app). In the right menu you just need to click 3D.

                Capture d’écran 2021-09-29 à 12.29.29.png

                I like to see Rossby waves too on this map rendering as shown here:
                https://community.windy.com/topic/16541/windy-3d-mode-is-back/4?_=1632899262385

                1 Reply Last reply Reply Quote 0
                • C
                  cleanersfulham @per 0
                  last edited by

                  @per-0 I was looking for that kinda information for so long time, lol.

                  1 Reply Last reply Reply Quote 0
                  • First post
                    Last post
                  Windyty, S.E. - all rights reserved. Powered by excellent NodeBB
                  NodeBB & contributors, OSM & contributors, HERE maps
                  Terms of Use     Privacy Policy