comp.lang.idl-pvwave archive: archive » Map Projected Contour plot - function graphics

Home » Public Forums » archive » Map Projected Contour plot - function graphics - how to change the contoured data....

Show: Today's Messages :: Show Polls :: Message Navigator
E-mail to friend

Map Projected Contour plot - function graphics - how to change the contoured data.... [message #92366]

Tue, 01 December 2015 14:03

Geo
Messages: 8
Registered: December 2015

Junior Member

Hi there,

OK so I have set up a map-projected contour plot by doing this:

mp1 = map('Equirectangular', CENTER_LONGITUDE=0, $
POSITION=[0.1,0.1,0.90,0.75], $
LABEL_POSITION = 0, /BOX_AXES, $
/box_antialias, $
GRID_LATITUDE = 30, GRID_LONGITUDE = 45, $
/CURRENT, ASPECT_RATIO=0, LIMIT=[-89.99, -180, 89.99, 180])

etc., etc.

and then the contour plot....

cn = contour(data1, lon, lat, overplot = overplot, name='the_contour_plot',$ GRID_UNITS=2, MAP_PROJECTION='Equirectangular', $
RGB_TABLE=rgb, /CURRENT, RGB_INDICES=Indgen(nlevels), $
C_VALUE=levels, /FILL)

So I'm contour plotting 'data1' on a standard equirectangular map. So far, fine.

Now I want to change the contour plot to the show the next dataset in the sequence (lets call it data2 - it has the same dimensions as data1)

This looks to be simple:

cn.setdata, data2

But this doesn't work - I get:
% Not supported for MAPPROJECTION graphics.
So obviously, when the contour plot is 'map projected' it won't do an update
to the contour plot data itself.

Any idea how I can get around this? In general I am wanting to do lots of contour plotting with different map projections - but I need to be able to change the data (like when you go from time T to time T+1).

Thanks for any help,

Geo

Report message to a moderator

[Message index]

		Map Projected Contour plot - function graphics - how to change the contoured data.... By: Geo on Tue, 01 December 2015 14:03
		Re: Map Projected Contour plot - function graphics - how to change the contoured data.... By: chris_torrence@NOSPAM on Wed, 02 December 2015 11:24
		Re: Map Projected Contour plot - function graphics - how to change the contoured data.... By: Geo on Wed, 02 December 2015 11:34
		Re: Map Projected Contour plot - function graphics - how to change the contoured data.... By: Geo on Wed, 02 December 2015 11:41
		Re: Map Projected Contour plot - function graphics - how to change the contoured data.... By: chris_torrence@NOSPAM on Fri, 11 December 2015 08:47
		Re: Map Projected Contour plot - function graphics - how to change the contoured data.... By: Geo on Thu, 17 December 2015 09:36

Previous Topic:	chrome browser update
Next Topic:	Globe ('satellite') map projection in New Graphics....

-=] Back to Top [=-

[ Syndicate this forum (XML) ] [

] [

]

Current Time: Fri Nov 28 05:42:46 PST 2025

Total time taken to generate the page: 0.00836 seconds