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Re: Cylindrical map projection screwed up? [message #13521 is a reply to message #13518]

Fri, 13 November 1998 00:00

Liam Gumley
Messages: 473
Registered: November 1994

Senior Member

Jonathan Joseph wrote:
> I've been doing some stuff using cylindrical map
> projections using set_map. So, darn it, I expect
> my lines of longitude to be vertical, and my lines
> of latitude to be horizontal in the image.
>
> But, when I set the LIMIT keyword to just look
> at a small portion of the globe, this is not
> the case. In fact, I only get a true cylidrical
> projection if the min and max latitude have the
> same magnitude, ie. -30 to 30 degrees.

Try this:

map_set, 30, -80, limit=[20,-100,40,-60], $
/cyl, /isot, /cont, /grid ; Bad result

map_set, 0, -80, limit=[20,-100,40,-60], $
/cyl, /isot, /cont, /grid ; Good result

Cheers,
Liam.

---
Liam E. Gumley
Space Science and Engineering Center, UW-Madison
1225 W. Dayton St., Madison WI 53706, USA
Phone (608) 265-5358, Fax (608) 262-5974
http://cimss.ssec.wisc.edu/~gumley

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[Message index]

		Re: Cylindrical map projection screwed up? By: Jonathan Joseph on Fri, 13 November 1998 00:00
		Re: Cylindrical map projection screwed up? By: Jonathan Joseph on Fri, 13 November 1998 00:00
		Re: Cylindrical map projection screwed up? By: Liam Gumley on Fri, 13 November 1998 00:00
		Re: Cylindrical map projection screwed up? By: davidf on Fri, 13 November 1998 00:00

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