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Re: displaying things above the earth in a map projection [message #32316 is a reply to message #32220]

Wed, 25 September 2002 11:38

James Kuyper
Messages: 425
Registered: March 2000

Senior Member

"John R. Iverson" wrote:
...
> 2. I guess I just don't understand why this command doesn't do what I
> think it should? (draw a line from the map to the symbol you brought up
> earlier):
>
> plots, [45, 45], [45, 45], [0, 0.25], /t3d
>

Well, I've figured out what it's doing. I can't say that I understand
why. Try the following:

plots, 10*indgen(9),90-10*indgen(9),0.1*indgen(9),/t3

Apparantly it draws each line segment at a constant Z value equal to the
Z value at the start of the line segment. Therefore, in particular, for
your command it draws a straight line from [45,45,0] to [45,45,0].

Would anyone care to enlighten me as to why this was considered a
worthwhile thing to do?

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[Message index]

		Re: displaying things above the earth in a map projection By: John R. Iverson on Wed, 25 September 2002 10:47
		Re: displaying things above the earth in a map projection By: Andy Loughe on Tue, 24 September 2002 14:40
		Re: displaying things above the earth in a map projection By: David Fanning on Tue, 24 September 2002 13:16
		Re: displaying things above the earth in a map projection By: David Fanning on Wed, 25 September 2002 20:16
		Re: displaying things above the earth in a map projection By: James Kuyper on Wed, 25 September 2002 11:38

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