Tuesday, September 22, 2009

3-D Glasses


Blogger Bob Wingate said...

At one of the mapping companies I used to work for, we referred to that as being "in anaglyphic mode".

Well, with the red / blue anaglyphic glasses of course, not the plastic cups. The cups though, that's quite creative; but you already knew that.

Free trivia...

Most mapping companies I know of who use softcopy workstations now use either polarized lenses (one at 90 degrees to the other) or lenses with liquid crystal shutters alternating at 120 Hz to enable the operator to see stereoscopically (not everyone can do this reliably and consistantly, BTW). Those who still use anaglyphic dye lenses mostly use the red / blue combination, though red / green also works well. I was never told in so few words, but I think red / blue is preferred over red / green because a number of men have red / green color blindness.

And of course if you don't have a stereomodel to view, you can't extract 3D data points to generate all those nice elevation contour lines for the map file; which is the point to all this seeming folderol.

More than you wanted to know, I'll bet!

September 22, 2009 at 11:46 PM  

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