Date:         Tue, 5 Jun 2007 15:13:21 +1000
Reply-To:     "Johnson, David" <David.Johnson@CBA.COM.AU>
Sender:       "SAS(r) Discussion" <SAS-L@LISTSERV.UGA.EDU>
From:         "Johnson, David" <David.Johnson@CBA.COM.AU>
Subject:      Re: SAS Graph vs. R (was: Re: Heretical Question Alternatives to
              SAS)
In-Reply-To:  A<BAY103-F393D1B1C98F4A6F8144663B02C0@phx.gbl>
Content-Type: text/plain; charset="us-ascii"

Getting base maps at the appropriate detail level is often the issue
here.  In the U.K. I wanted data down to delivery offices with the
appropriate boundary vectors, but this was a rather expensive extra
investment.  Similarly in Australia, I wanted it down to CCDs, but since
I couldn't get the vectors for postcodes, getting it down to the
granularity of some 50 residences was impractical.

I have talked at some length with people who have designed map
representations based on the 50 states and plotted all manner of data
including population growth.  They are very impressive, and if this had
been available to Charles Joseph Minard, one wonders whether he might
have added anything to his groundbreaking map.  I'm not sure it needed
it, but tracking Yankee and Confederate armies through various campaigns
was a visualisation I discussed at one point.

The work produced for Forum2007 was often exceptional, and should
provide many ideas for the enquiring mind.  That it has inspired the
other Dave to this extent is not especially surprising, but is
gratifying.  I'm glad that even he finds something new from time to
time.

I am working on an animated map now for a presentation, and have been
experimenting with a number of possibilities including colour coding the
segments by populations.  It might mean using a more granular colour
palette than I would consider safe for the web, it depends on the data
itself.  However, there is a large benefit to be had from deriving the
colour of a segment by dividing the population into a maximum
population, and formatting that into a CX colour specification.

Kind regards

David


"Neque porro quisquam est qui dolorem ipsum quia dolor sit amet,
consectetur, adipisci velit..."

-----Original Message-----
From: SAS(r) Discussion [mailto:SAS-L@LISTSERV.UGA.EDU] On Behalf Of
David L Cassell
Sent: Friday, 1 June 2007 12:18 PM
To: SAS-L@LISTSERV.UGA.EDU
Subject: Re: SAS Graph vs. R (was: Re: Heretical Question Alternatives
to SAS)

lee.kitty@YAHOO.COM replied:
>
>good to know that brushing exists. i have never heard of proc insight
>before. always learn something new on sas-L.
>
>i assume proc insight can work with the GIS tools in SAS?
>
>btw, i have some time & space data (counties over time). I have cancer
>rates and i want to display the spatial and temporal dependence.
>instead of having nth static graphs, one for each time period, is there

>a dynamic way to visualize this kind of data? have you seen any good
>time & space graphs?
>
>
>K.
>

SAS/INSIGHT doesn't play well with other children.  You could slip the
data into INSIGHT and look at behavior as you change X, Y, and t, but
you would lose the inherent spatial structures because INSIGHT won't
know you have temporo-spatial data.

On the other hand, you might consider looking at a couple SGF 2007
poster papers on graphics, and use their techniques to animate your data
in SAS/GRAPH so that you can see the behavior of your spatial data
across your time periods.
Search for "GIFANIM".

HTH,
David
--
David L. Cassell
mathematical statistician
Design Pathways
3115 NW Norwood Pl.
Corvallis OR 97330

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