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Re: Overlaying a contour on a small image [message #58985 is a reply to message #58984]

Fri, 29 February 2008 11:06

David Fanning
Messages: 11724
Registered: August 2001

Senior Member

David Fanning writes:

> Wayne Landsman writes:
>
>> Does anyone have a routine to overlay a contour plot on a small image
>> that is both accurate and aesthetically pleasing?
>
> Isn't this what you want:
>
> im = dist(9)
> thispostion = [0.1, 0.1, 0.9, 0.9]
> TVIMAGE, bytscl(im), POSITION=thisPosition, /KEEP_ASPECT_RATIO, $
> /NOINTERP, /ERASE
> contour,im, Position=thisPosition,/xsty,/ysty,/noerase,$
> scale_vector(findgen(9), 0, 9), scale_vector(findgen(9), 0, 9)

I don't know. What do you think of this:

im = dist(9)
im[2,2] = 15
im[4:5, 4:5] = 10
thispostion = [0.1, 0.1, 0.9, 0.9]
TVIMAGE, bytscl(im), POSITION=thisPosition, /KEEP_ASPECT_RATIO, $
/NOINTERP, /ERASE
contour,im, Position=thisPosition,/xsty,/ysty,/noerase,$
scale_vector(findgen(9), 0, 9), scale_vector(findgen(9), 0,9), $
level = 6

isocontour, im, v, c, c_value = 6
Plots, v[0,0:6]+0.5, v[1,0:6]+0.5, color=fsc_color('dodger blue')
Plots, v[0,7:*]+0.5, v[1,7:*]+0.5, color=fsc_color('dodger blue')

Note how I have to add a half pixel to the ISOCONTOUR to get
it anywhere near where I want it. Weird.

Cheers,

David
--
David Fanning, Ph.D.
Fanning Software Consulting, Inc.
Coyote's Guide to IDL Programming: http://www.dfanning.com/
Sepore ma de ni thui. ("Perhaps thou speakest truth.")

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[Message index]

		Re: Overlaying a contour on a small image By: wlandsman on Fri, 29 February 2008 12:31
		Re: Overlaying a contour on a small image By: pgrigis on Fri, 29 February 2008 11:15
		Re: Overlaying a contour on a small image By: David Fanning on Fri, 29 February 2008 11:06
		Re: Overlaying a contour on a small image By: David Fanning on Fri, 29 February 2008 10:41

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