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Thread: 10.000x10.000px Polar Grid (basic)

  1. #1
    Guild Member Alturax's Avatar
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    Post 10.000x10.000px Polar Grid (basic)

    Hey guys! I made something for a future map, but I decided to share it here since i didn't find that many of these online, and the ones I did find were far too short.

    Click image for larger version. 

Name:	polargrid10000x10000.png 
Views:	225 
Size:	4.18 MB 
ID:	79900

    If everything works right, this should be a transparent image with small lines. Just open with PS/Gimp and have fun

  2. #2
    Community Leader Bogie's Avatar
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    Hey that's cool, could be useful!

  3. #3
    Administrator Facebook Connected Diamond's Avatar
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    Thanks for this! I use these semi-regularly, and I've always wanted a really large one like this.

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    Guild Expert johnvanvliet's Avatar
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    normally i would first georeference a map then add the grid based on the lat/long

    an example ( i have been reprocessing some Voyager image data )
    Neptune :

    mapped to simple cylindrical

    South pole mapped to polar stereographic
    --- 90 seconds to Midnight ---
    --------

    --- Penguin power!!! ---


  5. #5
    Guild Member Alturax's Avatar
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    That seems quite a bit faster than the couple of hours I spent manually doing in the lines x)

    Reminds me I need to pick up on more software!

    Glad you can enjoy it

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    This is great, thanks! I had occasion to want one of these for equatorial view recently, and couldn't find anything big enough, so if you are in the mood, I'll bet an equatorial one would also be very welcome

  7. #7
    Guild Grand Master Azélor's Avatar
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    I think you could simply use Gprojector and make a grid (with the map of Earth) with almost any projection.

  8. #8
    Guild Expert Facebook Connected Caenwyr's Avatar
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    This is great! I know this is really off-topic, but... Does anyone know how I can convert my own map (http://www.cartographersguild.com/sh...504#post289504) to another projection? The current one should be Lambert's.
    Caenwyr Cartography


    Check out my portfolio!

  9. #9
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    Quote Originally Posted by Caenwyr View Post
    This is great! I know this is really off-topic, but... Does anyone know how I can convert my own map (http://www.cartographersguild.com/sh...504#post289504) to another projection? The current one should be Lambert's.
    This has map projections from a rectangular map: http://maptoglobe.bitbucket.org/

  10. #10
    Guild Expert johnvanvliet's Avatar
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    Caenwyr


    Qgis

    the GUI for the Georeferencing will have you select a mapping format and create a list of " lat / long = x/y " by point and click and typing in the lat / long for that pixel

    you have grid lines already , so about 10 min. of work should be all that is needed
    ( once you run through the tutorial on the qgis web site )

    http://docs.qgis.org/2.8/en/docs/use...ojections.html

    training manual
    http://docs.qgis.org/2.8/en/docs/training_manual/

    georeferencing
    http://docs.qgis.org/2.8/en/docs/tra...ferencing.html
    Last edited by johnvanvliet; 02-07-2016 at 01:54 PM.
    --- 90 seconds to Midnight ---
    --------

    --- Penguin power!!! ---


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