Importing a map in Pierce quincuncial

Tips and tricks for using Geocart 3
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Barwickian
Posts: 3
Joined: Sat May 03, 2014 12:14 am

Importing a map in Pierce quincuncial

Post by Barwickian » Fri May 16, 2014 11:01 pm

A friend has asked my to make a globe based on a map he has in Pierce quincuncial format, with the centre based on the south pole (and hence the corners all representing the north pole).

How do I import the map and tell Geocart that the corners all represent the north pole?

daan
Site Admin
Posts: 721
Joined: Sun Mar 29, 2009 12:17 am
Location: Seattle

Re: Importing a map in Pierce quincuncial

Post by daan » Sat May 17, 2014 1:06 am

Hello Barwickian, and welcome to the forums.

The detailed process is in the manual, section 7.5. But in outline,

1. Place the map image (TIFF, JPEG, or Photoshop PSD) into a Geocart window.
2. Create a new Peirce quincuncial map to overlay on top of the image. (The databases you use don’t matter, but you probably don’t want raster imagery getting in the way.)
3. Adjust the size and position of the map you create to precisely align with the image.
4. Adjust your map’s resolution to match the resolution of the image.
5. Save the document as a “Reprojection database”.
6. Open a new window, create a map using a projection suitable for making a globe.
7. Add the reprojection database from (5) into the map as a database.

Does that help?

Cheers!
— daan

Barwickian
Posts: 3
Joined: Sat May 03, 2014 12:14 am

Re: Importing a map in Pierce quincuncial

Post by Barwickian » Sun May 18, 2014 2:29 pm

That helps immensely. Thank you.

daan
Site Admin
Posts: 721
Joined: Sun Mar 29, 2009 12:17 am
Location: Seattle

Re: Importing a map in Pierce quincuncial

Post by daan » Sun May 18, 2014 3:56 pm

Please don’t forget to set quality to Final Quality in the Map men for best results.

— daan

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