From: David B. Reusch <dbr_at_nyahnyahspammersnyahnyah>
Date: Fri, 01 Dec 2006 16:35:22 -0500

I have been creating maps for years like the one below using
gsnMaskLambertConformal and for the most part this is fine.

my understanding/experience is that the masking process inherently (?)
produces Postscript such that this figure is actually a rectangle and
the areas outside my masked area are white-filled objects covering up
the map underneath. this leads to problems when I load the postscript
file into Illustrator (for example, all versions I've used over the last
few years) and put these figures on a non-white background such as this:

now the white backgrounds show up and it's not particularly pleasing to
the eye. I've been dealing with this for some time by just not using
colored backgrounds, but now that I've figured out how to do this as I'd
like (if not perfectly) with another plot (see below, "ocean" is
transparent), I'm wondering if there's a way to accomplish something
similar with this plot?

a possibly significant difference between these plots is that the one
I'd like to fix contours a much larger 2-D grid that only has data
defined within the North Atlantic basin. the plot I prefer (even if
it's still a bit weird) is contouring non-gridded point data from
Greenland only. (note: the "weird" white box mid-way up the west coast
of Greenland does not always appear exactly like this, though I think
something's usually there.) I think it might be possible to change my
plots to 1-D if that would help. I'm not sure why I went to 2-D with
this data (it's read in as 1-D) unless that used to be a contouring
requirement and no longer is?

I've looked at the mp resources but have yet to convince myself that
there's a path there to where I want to be, so I was hoping someone else
might have some suggestions.


p.s. code for the above is available on request.

517 Deike Building
Earth & Environmental Systems Institute
Penn State University
University Park, PA 16802

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Received on Fri Dec 01 2006 - 14:35:22 MST

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