Starship Asterisk*

http://lasp.colorado.edu/~bagenal/3720/ ... _npole.jpg
Copyright: Daniele Gasparri

What does "digital projection" mean?

geckzilla wrote:What does "digital projection" mean?

It means that a digital image of the entire surface of the object was constructed from individual images (such as from Cassini), and then a 3D model was rendered by mapping the surface image onto a sphere, ring, etc.

It's a little unclear why this topic is titled "Gasparri", or gives Daniele Gasparri as the copyright holder. The image itself indicates its copyright belongs to Björn Jónsson, and it (as well as the image maps used) can be found on his pages.

I think we can rule out projection in the sense of slide projectors. I think what we are talking about here is like the digital creation of a view not captured directly, but projected from other scenes.

BTW: I think this copyright is Björn Jónsson's
http://www.mmedia.is/~bjj/satsys_rend.html
http://www.mmedia.is/~bjj/planet_rend/saturn_npole.jpg

Danielle Gasparri's image is similar.
http://www.danielegasparri.com/Italiano/index_ita.htm
http://www.danielegasparri.com/Cartogra ... libro2.jpg

Edit: Look's like Chris beat me to it. I thought I had already posted this.

I see. I've never heard of "digital projection" before but figured that's what it was just from looking at it. It seems like an odd name to me.

geckzilla wrote:I've never heard of "digital projection" before but figured that's what it was just from looking at it.
It seems like an odd name to me.

It is an odd name but the general idea is an old one:

The Hereford Mappa Mundi, about 1300, Hereford Cathedral, England.

A classic map with Jerusalem at centre, east toward the top,
Europe the bottom left and Africa on the right.

neufer wrote:It is an odd name but the general idea is an old one:
The Hereford Mappa Mundi, about 1300, Hereford Cathedral, England.

I don't think the comparison is a very good one. Nor is the name odd- it describes very well the process, which is to digitally project an image map onto a 3D model. That's nothing like the map you reference. The closest non-digital analog is the production of a globe, where individual flat map segments are attached to the surface of a physical 3D model.