sketchucation logo sketchucation
    • Login
    ℹ️ Licensed Extensions | FredoBatch, ElevationProfile, FredoSketch, LayOps, MatSim and Pic2Shape will require license from Sept 1st More Info

    Geo-location and Solar North

    Scheduled Pinned Locked Moved SketchUp Discussions
    sketchup
    14 Posts 3 Posters 1.8k Views 3 Watching
    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.
    • sfto1S Offline
      sfto1
      last edited by

      When I geo-locate a site, the green axis and solar North do not line up. I need to provide an angle to a surveyor from a fixed line on the model to North, but I can't pick the solar North line. I can only reference and "grab" the green axis line. How can I determine this angle? and any idea why they do not line up in the first place?

      Also, are the shadows based on the axis of origin or solar North?

      The shadows play an important role in the monument we are working on, so locating work points for the surveyor is critical.

      Any help is greatly appreciated.

      1 Reply Last reply Reply Quote 0
      • Dave RD Offline
        Dave R
        last edited by

        Do you have the Solar North plugin from the Extension Warehouse? It would let you set the Solar North angle.

        Etaoin Shrdlu

        %

        (THERE'S NO PLACE LIKE)

        G28 X0.0 Y0.0 Z0.0

        M30

        %

        1 Reply Last reply Reply Quote 0
        • sfto1S Offline
          sfto1
          last edited by

          Dave,

          I do have the Solar North plugin installed. I'm confused why the green axis and Solar north do not line up, and more importantly I need to know what the SU shadows are generated from. If I reset Solar North to the green axis in the geo-located model, the image and models do not move, but the shadows do change. What is inherently "North" when geo-locating?

          1 Reply Last reply Reply Quote 0
          • pbacotP Offline
            pbacot
            last edited by

            Why should you need to set the Solar North angle if the model is geo-referenced? (I'm assuming there's reasonable accuracy in this SU feature)

            Perhaps the north (green axis) in "Find Location" is the local grid north--which isn't the same as solar north--or am I mistaken? Would be nice if Trimble could provide more technical information on this. Maybe this should be handed over to your surveyors to figure out. If our present day surveyors can't match Stonehenge we're in trouble.

            MacOSX MojaveSketchUp Pro v19 Twilight v2 Thea v3 PowerCADD

            1 Reply Last reply Reply Quote 0
            • Dave RD Offline
              Dave R
              last edited by

              Hmmm... I wrote a reply and it disappeared. 😞

              Solar North and True North don't necessarily coincide. Maps are set up for True North, not Solar North.

              Solar North occurs when the sun is at its zenith. We generally think of that as occurring at noon but the actual time it occurs depends upon where in the time zone your model is geo-located.

              Etaoin Shrdlu

              %

              (THERE'S NO PLACE LIKE)

              G28 X0.0 Y0.0 Z0.0

              M30

              %

              1 Reply Last reply Reply Quote 0
              • sfto1S Offline
                sfto1
                last edited by

                So, I should reasonably expect real world shadow behavior similar to the shadows generated in a geo-located model if I convey construction staking coordinates based off of True North???

                1 Reply Last reply Reply Quote 0
                • Dave RD Offline
                  Dave R
                  last edited by

                  Yes. I would think you should.

                  Etaoin Shrdlu

                  %

                  (THERE'S NO PLACE LIKE)

                  G28 X0.0 Y0.0 Z0.0

                  M30

                  %

                  1 Reply Last reply Reply Quote 0
                  • sfto1S Offline
                    sfto1
                    last edited by

                    Thanks Dave!

                    1 Reply Last reply Reply Quote 0
                    • Dave RD Offline
                      Dave R
                      last edited by

                      You're quite welcome. I hope the monument gets installed correctly. You could mount it on a large lazy Susan so it can be rotated to face the sun as needed. Sort of a real life Face Me component. πŸ˜„

                      Etaoin Shrdlu

                      %

                      (THERE'S NO PLACE LIKE)

                      G28 X0.0 Y0.0 Z0.0

                      M30

                      %

                      1 Reply Last reply Reply Quote 0
                      • pbacotP Offline
                        pbacot
                        last edited by

                        Thanks Dave. Good to know.

                        MacOSX MojaveSketchUp Pro v19 Twilight v2 Thea v3 PowerCADD

                        1 Reply Last reply Reply Quote 0
                        • sfto1S Offline
                          sfto1
                          last edited by

                          @dave r said:

                          You're quite welcome. I hope the monument gets installed correctly. You could mount it on a large lazy Susan so it can be rotated to face the sun as needed. Sort of a real life Face Me component. πŸ˜„

                          It might come to that β˜€

                          One more question. The Longitude and latitude appears to be in decimal format. Is that everyone else's understanding? As in 45.37770 degrees not 45 degrees 37 minutes and 77 seconds.
                          Surveyor asked for a clarification.

                          1 Reply Last reply Reply Quote 0
                          • Dave RD Offline
                            Dave R
                            last edited by

                            Yep. Decimal format for Lat/Long.

                            Etaoin Shrdlu

                            %

                            (THERE'S NO PLACE LIKE)

                            G28 X0.0 Y0.0 Z0.0

                            M30

                            %

                            1 Reply Last reply Reply Quote 0
                            • sfto1S Offline
                              sfto1
                              last edited by

                              Then I believe I'm set.

                              1 Reply Last reply Reply Quote 0
                              • Dave RD Offline
                                Dave R
                                last edited by

                                Perfect.

                                Etaoin Shrdlu

                                %

                                (THERE'S NO PLACE LIKE)

                                G28 X0.0 Y0.0 Z0.0

                                M30

                                %

                                1 Reply Last reply Reply Quote 0
                                • 1 / 1
                                • First post
                                  Last post
                                Buy SketchPlus
                                Buy SUbD
                                Buy WrapR
                                Buy eBook
                                Buy Modelur
                                Buy Vertex Tools
                                Buy SketchCuisine
                                Buy FormFonts

                                Advertisement