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Quantitative Decisions

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About QD

We provide advice and strategy 
based on analyses and interpretations of
data.  Clients include private industry, law firms, nonprofit
organizations, and government agencies from around the
world.  Our experience is strongest in Environmental
Statistics and
decision analysis, where our principals have completed over 300 projects in the last
15 years.

Read the short case study Taking
risks, Reaping the Benefits for an example of our work. 
See the Qualifications pages for
more information.

If you are searching for environmental
investigation or remediation services, take a look at the X-Interchange
site.  The company is
well established and top-notch.
colleagues at AMO
Environmental Decisions have been doing good work in earth and
environmental resource management for an impressive list of clients,
especially in the Northeastern US.

This site includes two "sub-webs" based on
graduate-level courses we have developed and taught.  The Environmental
Statistics web is an introduction to the concepts and definitions--it
is not a "cookbook"--, but also includes valuable
software and data available nowhere else.
Geographic Information Systems (GIS) are
a critically important technology in our work.  This web includes
articles, presentations, tutorials, and free software used in a
one-semester introductory GIS course.
We develop ArcView-based GIS software by request.  If you
have a task that you think ArcView cannot do, or if you are losing
time or money performing repetitive tasks, drop us a line. 
We usually have a quick, inexpensive solution.  We have
helped over 2,000 people with ArcView needs since 1995. 

Check out our latest software!
XSect displays vertical profiles of point
data.  This lets you look at your data "from the
side" to show how values vary with depth or elevation along
Applications exist in environmental sampling, mining,
archeology, surveying, geology, and many other fields.

See our Software catalog
for more information or click on the image to go directly to the XSect
description.  The extensively illustrated user manual is free
for download or browsing.

Caveat lector

Interested in keeping current with the GIS industry? 
There are plenty of on-line sources of information, but if you
peek beneath most of them, you will find nothing but uncritical
re-publication of "location-based" marketjunk. 
However, two sites, both with free weekly online newsletters, are especially
useful and valuable.
-- Adena Schutzberg writes
accurate, pithy, and timely commentary for GISMonitor.  See http://gismonitor.com/
for more information.
-- Joe Francica edits Directions
Magazine, which publishes original articles, columns, maps, and
software.  Visit http://www.directionsmag.com. 
(If you believe you have found an online newsletter of equal or
better caliber, please contact us at the address below and let us
know about it!)

Site navigation

We post major changes in chronological order on our News
pages--if you are a returning visitor, check there for information on
updates and changes.  Other topics of timely interest
also appear on this home page.
Many articles and presentations about environmental data
analysis and GIS are available through the Articles
We have upgraded the References
section to include brief reviews of the recommended books. 
Check it out!


Our GIS Course "How
to" pages have appeared in the "Top Ten"
links at TenLinks.com,
a directory for engineers, designers, GIS professionals,
architects and other technical professionals.

Our Sample extension for
ArcView GIS 3.2 was awarded second place in the ESRI 2000 Users Conference
"Best Avenue Utility" competition.  This software is in use
throughout the world for creating arrays of regions
("grids," but in vector format), for designing sampling
plans, and much more.

There used to
be a nice illustration of our Reproject Grids
for ArcView on ESRI's ArcScripts
Sample Spotlights page.  Now that it's gone, click on the image at
left for a larger view and link to the ArcScripts
page for more information.

The Directions
Magazine "list
of lists" provides searchable access to all the major GIS-related
online discussion lists and their archives.   This is a
unique and exceptional resource for answers to GIS-related

Popular Links

GIS experts: join the independent ArcView mailing list for timely information and answers to questions. 
Learn how to join.

Check out the free software available from
QD!   We now have 37 ArcView scripts, extensions, and
utilities available at no cost.  Over 138,000 copies have been

Want a break?  Try the star puzzle. 
We solved it with GIS...


ColorRamp, Memorized Calculations, Rotate, Sample, XSect, and Tissot  are  trademarks of Quantitative Decisions.  All other products mentioned are registered
trademarks or trademarks of their respective companies.

Questions or problems regarding this web site should be directed to information
Copyright © 2000-2005 Quantitative Decisions.  All rights reserved.
Last modified: Monday August 11, 2003.


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In database since 2007-08-27 and last updated on 2014-04-01
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