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Magnetic Declination Addon

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  • Magnetic Declination Addon

    This addon shows the isogonic contours of earth's magnetic declination and an intensity map.



    Updated to v1.1 March 21, 2006
    Download Link
    Last edited by pangloss; 07-28-2007, 10:18 PM.
    To view all my addons visit http://www.panglosstech.com/.

  • #2
    Cool, I did the samething a while back with a shapefile I got from National Geophysical Data Center. Its denser but I was never able to figure out how to label it. I probably still have it around here somewhere.

    http://www.twobeds.com/upload/userfi...ntarr/isog.png

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    • #3
      Yes...very cool. If you wish it, you can include in this addon the free
      Declimag software. The accuracy is very good and it use two models
      for the calculation.



      for download : http://perso.wanadoo.fr/hermetica/Declimag_fr.zip

      If you speak french you can see too : http://perso.wanadoo.fr/hermetica/Pole.htm

      and the world declination map : http://perso.wanadoo.fr/hermetica/Isogones.pdf
      hermetica website
      My Addons web page
      Geoportail French Infos

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      • #4
        Thanks, hermetica. I'll include the Declimag program. There's no English version, I assume. It's pretty self-explanatory, anyway. I like your Magnetic Pole Addon.

        There are a half-dozen or so other paramaters that could be added, but I'd like to know what's of interest: Total Intensity, Horizontal Intensity, Vertical Component, Inclination... The image maps aren't too hard to create.

        I can add more contours, but to get the coloring and labeling they have to be generated individually. I guess the finer contours could do without labels.

        I also have a problem on my computer with some contours vanishing when the point of view is near the equator. Do any of you see this, or is it specific to my configuration?
        To view all my addons visit http://www.panglosstech.com/.

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        • #5
          Awesome! I'll have to show this to some teachers, I'm sure they'll love it.
          I don't spread the word, I spread the world!
          Road Map for World Wind development and release
          I do not know .Net or DirectX.

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          • #6
            I also have a problem on my computer with some contours vanishing when the point of view is near the equator. Do any of you see this, or is it specific to my configuration?
            Yes me also, certain lines disappear when I zoome on the level from the
            equator. I tested with BMNG deactivated, same problem . I do not know the
            reason of it...

            There are a half-dozen or so other paramaters that could be added, but I'd like to know what's of interest: Total Intensity, Horizontal Intensity, Vertical Component, Inclination... The image maps aren't too hard to create.
            I think the Vertical Component and Inclination would be very interesting....

            hermetica website
            My Addons web page
            Geoportail French Infos

            Comment


            • #7
              I updated the addon to include inclination and some intensity maps. I also added hermetica's declination calculator, thanks.
              To view all my addons visit http://www.panglosstech.com/.

              Comment


              • #8
                <div class='quotetop'>QUOTE</div><div class='quotemain'>I updated the addon to include inclination and some intensity maps. I also added hermetica&#39;s declination calculator, thanks.
                [/b][/quote]
                [img]style_emoticons/<#EMO_DIR#>/rolleyes.gif[/img] I tested your last version. It&#39;s very cool.... Great work.....

                (it is necessary that I modify the Magnetic-Pole add-on in order to change the color
                of the lines and the icons. I think that who the yellow will be better visible if one wants
                to use the two add-ons simultaneously).

                March,27 2006.... It&#39;s ok now...
                Magnetic Pole Travel add-on Updated 1.4h. See :

                http://forum.worldwind.arc.nasa.gov/...showtopic=6314
                hermetica website
                My Addons web page
                Geoportail French Infos

                Comment


                • #9
                  Does anyone here think it is possible to just make the measure tool output declination in magnetic instead of grid? That would be really handy since grid declinations don't do much good in navigating.

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                  • #10
                    You would just need code that returned declination for a given latitude and longitude (not just plotting lines like this add-on does). Then you can do whatever you want with it. A floating compass that pointed to magnetic north from anywhere would be kind of neat.


                    PS: WW probably isn't intended to be a legitimate navigational aid.
                    Last edited by withak; 12-30-2006, 03:55 AM.

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