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    Geo-location and Solar North

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    • 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

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      • 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?

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        • 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

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          • 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

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            • 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???

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              • Dave RD Offline
                Dave R
                last edited by

                Yes. I would think you should.

                Etaoin Shrdlu

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                • sfto1S Offline
                  sfto1
                  last edited by

                  Thanks Dave!

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                  • 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

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                    • pbacotP Offline
                      pbacot
                      last edited by

                      Thanks Dave. Good to know.

                      MacOSX MojaveSketchUp Pro v19 Twilight v2 Thea v3 PowerCADD

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                      • 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.

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                        • Dave RD Offline
                          Dave R
                          last edited by

                          Yep. Decimal format for Lat/Long.

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                          • sfto1S Offline
                            sfto1
                            last edited by

                            Then I believe I'm set.

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                            • Dave RD Offline
                              Dave R
                              last edited by

                              Perfect.

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