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Thread: Name this projection!

  1. #1
    Guild Novice Facebook Connected
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    Default Name this projection!

    Hey everyone!

    I'm working on making a globe and I was wondering what is the name of this projection?
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  2. #2
    Guild Expert Gracious Donor Hai-Etlik's Avatar
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    It's a different way of doing an interrupted map with the gores joined at a pole rather than along the equator. I don't know which underlying projection is being used though. I'd guess at either Sinusoidal, or maybe Transverse Mercator.

  3. #3
    Guild Expert Ilanthar's Avatar
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    I would say a gnomonic projectio centred on each Pole with a bit of buckminster fuller...

  4. #4
    Guild Adept johnvanvliet's Avatar
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    an old thread but
    the software used for the "flower petal" projection
    http://astrogeology.usgs.gov/maps/pl...aps-and-globes

    was custom built in house software for the old ISIS2 gis software

    this was NOT included in the upgrade of isis FORTRAN and C code to the c++ in ISIS3
    "daisy" can be built from the old isis 2 code
    http://isis.astrogeology.usgs.gov/Is...stallation.cgi

    please note the operating systems that it supports
    RedHat 9
    RedHat Enterprise Linux WS Release 3
    RedHat Enterprise Linux WS Release 4
    SuSE 8.2
    SuSE 9.0
    SuSE 9.3
    SuSE 10.0
    SuSE 10.1

    NONE of them are still supported

    BUT
    the current RHEL7 can run rhel4 in a KVM just fine


    the output from the daisy help
    DAISY - Create a "flower petal" projection for globes
    Create a series of 12 Transverse Mercator projections that are 32 degrees in longitude and 91 degrees in latitude to form a "flower petal" projection for making globes. If the northern hemisphere is being created, the latitude range is -1 to +90. If the southern hemisphere is being created, the latitude range is -90 to 1. The petals are formed by changing the center longitude and map rotation in steps of 30 degrees for each Transverse Mercator projection. Each section is put into the mosaic. The final center of the projection is a Lambert Azimuthal Equal-area centered on the pole and covers from -90 to -75 or 75 to 90 degrees latitude and 360 degrees in longitude. This is the last cube that is placed in the mosaic.

    remember this is OLD code
    ti has hardcoded into the scripts
    things like this
    " netscape $ISISHTML/documentation.html"

    When was the last time anyone used "Netscape navigator "
    for me that was 1996 or 98
    Last edited by johnvanvliet; 02-26-2015 at 10:56 PM.
    --- 3 minutes to midnight ---

  5. #5
    Guild Adept johnvanvliet's Avatar
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    now one could use " ppmglobe "
    http://netpbm.sourceforge.net/doc/ppmglobe.html

    set to 12 and manually cut and remap each gore
    --- 3 minutes to midnight ---

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