ArcGIS Geostatistical Analyst -- how does itdisplay / fit variograms?

 This is a bit of a distant memory from a few years back when I also was trying to better understand what ArcGIS was actually doing, but I believe there is some, though probably not a large amount of, additional technical detail available in the following ESRI manuals:

Johnston, K. et al. 2001. Using ArcGIS geostatistical analyst. Redlands, CA: Environmental Systems Research Institute.
McCoy, J. et al. 2001. Using ArcGIS spatial analyst. Redlands, CA: Environmental Systems Research Institute.

I don't think I was able to find these online as I have a memory of tracking them down through the university map library.

-chris

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"G. Allegri" <giohappy at gmail.com> 09/06/08 1:45 PM >>>

I faced the problem of collecting informations about ArcGIS Geospatial
extension while I was following the geostatics course at university. A
month looking for documentation about what was behind the scene, but
nothing... Just basics explanations about kriging. That's when I've
discovered gstat!

In the Institute I come from ArcGIS/ArcInfo is the most widely used
system, for cartography and geoDB management. But nobody would use it
for geostatistical analysis! Ok, IDW, or other simple interpolations,
but nothing beyond this.
The only reason I would spend money for commercial software can be
Geovariances software (in the Institute they use Isatis) [1], nothing
else.

Giovanni

[1] http://www.geovariances.com/

2008/9/6 Roger Bivand <Roger.Bivand at nhh.no>:

On Sat, 6 Sep 2008, Barry Rowlingson wrote:

2008/9/6 D G Rossiter <rossiter at itc.nl>:

Naturally we want the students to understand what the program is doing
for them!  Although ESRI promotes "press the button and look at the
cross- validation". I do like their disclaimer in the ArcGIS Desktop
9.3 help: "Kriging is a complex procedure that requires greater
knowledge about spatial statistics than can be conveyed in this
command reference". They then ref. Burrough (1986! not even the
revised book), Heine (1986), McBratney & Webster Journal of Soil Sci.
37:317 (1986), Oliver IJGIS 4 (1990), Press etc. Numerical Recipes,
and Royle et al. Geoprocessing 1 (1981). Not exactly the most up to
date or accessible reference list (no offrence to the fine authors
mentioned).

For software that costs $2500 dollars for a single- user license, I'd
expect documentation written in gold- leaf on human skin parchment. I
wouldn't expect to be palmed off with 'this bit is tricky, go read
some books', I'd expect the software to do just about everything,
explain what it was doing in the language of your choice, and give you
a backrub at the same time.

I'm flabbergasted that a solution for what is probably not one of the
richest universities in the world is going to tie them to one of the
most expensive geostats packages I've ever seen. I'm staring at this
pricetag on the ESRI web site because I just feel like I must be
hallucinating. But I'm not. Two and a half THOUSAND dollars. Oh, and
you need an ArcView license as well, a mere snip at one and half
thousand dollars. Zimbabwe dollars? No, US dollars. I checked.

I'm guessing you can't rethink your plans at this point, but you
could consider pointing out to students that free, cross- platform,
high- quality, open- source, well- documented software for statistics and
geostatistics is available to download from www.r- project.org, and
there's a friendly bunch of people willing to answer sensible
questions on the mailing list (including those professors who make it
their business to echo 'please read the posting guide' all the time).

Hope this doesn't come over as too much of a rant, but I'm running a
course on Open- Source GeoSpatial Software in November and I think I
may have just found a nice counter- example :)

Barry
[think I need a cup of tea and a lie- down now]

And FOSS4G 2008 is about to happen in Cape Town!

http://conference.osgeo.org/index.php/foss4g/2008

Just think what these young scientists could do with QGIS/GRASS/R/gstat or
other suitable toolchains!

However, I've seen similar things, I'm afraid they may be being driven by
clueless "donor" organisations.

I've just put the tea on ...

Roger

--
Roger Bivand
Economic Geography Section, Department of Economics, Norwegian School of
Economics and Business Administration, Helleveien 30, N- 5045 Bergen,
Norway. voice: +47 55 95 93 55; fax +47 55 95 95 43
e- mail: Roger.Bivand at nhh.no