The experiment in converting Old "Age of Discovery" maps into globes.
Turning a flat 2D map into a 3D globe.

This map was created in 1792 by Matthew Carey.

First I cut one hemisphere (3000x3000 pixels) from the scan
Then I created an 18x18 grid pattern (3000x3000 pixels) which is subdivided into a 180x180 grid.
Here is a corner of the "Target grid"
hemiGrid.jpg - 8967 Bytes
Then I opened both images into Morph Man 2000 (by STOIK) and placed points on the map at the intersections
of the longitude and latitude lines. Ultimately I had to also add intermediate points.
sourcegridCloseup.jpg - 44109 Bytes

Quite a few points were required.
sourcegrid.jpg - 49338 Bytes

The same circular point pattern appears on the target grid image.
It is then a matter of moving the points on the grid to the new (equirectangular) locations.
targetgrid.jpg - 43073 Bytes

The morphed image...
WestEqu.jpg - 77085 Bytes
The second hemisphere/map image was then imported
Very few adjustments were needed to get this half to work.
The two halves are combined.... and touched up

Combo.jpg - 92642 Bytes

Bruno Postle came up with a photoshop plugin which converts the above equirectangular image into globe gores.
IP Slicer
Gores.jpg - 70405 Bytes

trim out the image leaving equator attached,
trimit.jpg - 36261 Bytes

tape the equator and poles together and your done...
globeE.jpg - 43371 Bytes

globeW.jpg - 37078 Bytes

A feature I would like in this awesome plugin is an option to curve the horizontal data as it gets near the poles.
while having it remain straight at the equator.
If the current out put was applied to a perfect sphere, the straight segments of the longitudes
would appear to sag when viewed straight on to the equator. (the math involved in this is beyond me).
globeTop.jpg - 32785 Bytes

This next image is a small part of a 1890's gore (the full scan is 5500x11000).
Note the curve of the latitudes which diminishes to none at the equator.
radgore.jpg - 58489 Bytes
Also note how the image goes beyond the edge of the gore. Bruno Postle's goremaker offers the digital equivalent.