Mercator
Confutus
Newcomer
After falling down the learning curve for CC3+ a couple of times, I'm back around for another try. I thought I would practice with the various projects in the Cartographer's Annuals. Even if they are a bit too advanced for me, they give me a starting point.
My first obstacle is with the Mercator projection in the first Cartographer's Annual, (CA01). I elected to go with a real-world approach. I managed to download a binary file for Real-world Earth for FT3, and dropped the sea level to correspond to about the last glacial maximum to expose the various land bridges, and found a grid setting and a find a suitable projection to export into CC3+, with just the coastlines. Fine so far...but the whole globe gets exported, and what I need is the two hemispheres. I have an eastern hemisphere view and a western hemisphere view, but both these include the (severely distorted) other side of the globe as well. The instructions in the Mercator Mapping guide are incomplete. What am I missing?
My first obstacle is with the Mercator projection in the first Cartographer's Annual, (CA01). I elected to go with a real-world approach. I managed to download a binary file for Real-world Earth for FT3, and dropped the sea level to correspond to about the last glacial maximum to expose the various land bridges, and found a grid setting and a find a suitable projection to export into CC3+, with just the coastlines. Fine so far...but the whole globe gets exported, and what I need is the two hemispheres. I have an eastern hemisphere view and a western hemisphere view, but both these include the (severely distorted) other side of the globe as well. The instructions in the Mercator Mapping guide are incomplete. What am I missing?
Comments
For a "regular" FT3 world, it is easy to rotate the globe just by changing the longitude of the north pole, but when it is made from a binary file, like I assume yours is since it uses earth data (I do assume you imported the earth data rather than draw it yourself from scratch), it isn't quite that easy.
Projection 91, "AE Hemispheres"
Scale 1.0
Description "Azimuthal Equidistant Hemispheres"
Segment "Azimuthal Equidistant", 0, -110, 0, 0, 1, 0, 0
scale 1, 1
Offset -0.5, 0.0
Effective -180, 90, -20, -90
Rotate 0
EndSegment
Segment "Azimuthal Equidistant", 0, -110, 0, 0, 1, 0, 0
scale 1, 1
Offset -0.5, 0.0
Effective 160, 90, 180, -90
Rotate 0
EndSegment
Segment "Azimuthal Equidistant", 0 70, 0, 0, 1, 0, 0
scale 1, 1
Offset 0.5, 0.0
Effective -20, 90, 160, -90
Rotate 0
EndSegment
EndProjection
This is centered on -20 degrees (probably the opposite direction from what you intended). The important idea here is that the hemisphere that won't show everything gets changed into the original part plus a sliver.