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Re: Postscript output [message #7185 is a reply to message #7108]

Sat, 05 October 1996 00:00

davidf
Messages: 2866
Registered: September 1996

Senior Member

Richard Townsend <rhdt@star.ucl.ac.uk> writes:

> I have a problem with postscript output that I'm hoping someone will be
> able to help me with. I have some IDL arrays of dimension N x N which are
> latitude/longitude maps of some function (a spherical harmonic) over the
> surface of a sphere. I want to display these maps wrapped over the sphere
> in an orthographic projection. The commands I am using are something of
> the form:
>
> map_set,/orthographic,/noborder,/advance,/isotropic,45,0
> mapped=map_patch(bytscl(array1),xstart=x0,ystart=y0, $
> xsize=xs,ysize=ys,missing=255)
> tv,k,x0,y0,xsize=xs,ysize=ys

> My problem is that the boundaries of the
> globes which I plot are very jagged, and increasing the size N of the
> arrays does not cure this. How can I increase the postscript resolution
> and get rid of the jagged edges?

I am not sure how to get rid of the jaggies with the routine MAP_PATCH.
But if you can use the MAP_IMAGE routine instead, you can increase the
smoothness of the edges by setting the COMPRESS keyword equal to 1.
This will solve the inverse map transformation for each pixel in the
output image and will improve the result dramatically for PostScript
output.

David

--
David Fanning, Ph.D.
Phone: 970-221-0438
Fax: 970-221-4728
E-Mail: davidf@fortnet.org

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[Message index]

		Postscript output By: Richard Townsend on Wed, 02 October 1996 00:00
		Re: Postscript output By: davidf on Sat, 05 October 1996 00:00
		Re: Postscript output By: davidf on Fri, 02 April 1999 00:00
		Re: Postscript Output By: Liam E. Gumley on Mon, 31 January 2000 00:00
		Re: Postscript Output By: Liam E. Gumley on Mon, 31 January 2000 00:00
		Re: Postscript Output By: davidf on Mon, 31 January 2000 00:00
		Re: postscript output By: David Fanning on Wed, 06 July 2011 08:58

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