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About G4G
Morphometric indices are powerful tools for investigating the interplay of tectonics, lithology, and climate on mountain channels and landscapes. The tutorials provided here are aimed at the graduate student in the Geosciences whose research involves DEMs and upland watersheds.

What’s On This Website
G4G brings a little order to the ever-expanding GIS universe. First, the site provides a set of how-to instructions on many things Geoscientists want to do with GIS. Judging by the number of enthusiastic responses from visitors to the site, we know we’re filling a need unmet by most university courses. Second, the site offers a response to academic journals in the Geosciences that omit or highly abbreviate the GIS methods used to generate results reported (JGR is a notable exception). Clear methods are repeatable methods. With clarity our goal, we read dozens of peer-reviewed articles each year and reverse-engineer the steps likely used by the authors. We publish here what we figure out. Third, we offer a place for students to ask questions and get answers.

Currently there are no textbooks on this stuff. I’ll probably end up writing one  – something like “101 Lessons in Geomorphometry” or “GIS Best Practices for the Geosciences”. Until then, this website and those listed in Useful GIS Links will have to suffice. Be sure to check out these books:
Burbank & Anderson (2012) Tectonic Geomorphology – 2nd Edition
– Pelletier (2008) Quantitative Modeling of Earth Surface Processes
– Bolstad (2012) Introduction to GIS – 4th Edition
– Felleisen et al. (1993) How to Design Programs – MIT Press/HTDP.org (Free Book)
– Hengl & Reuter (2009) Geomorphometry: Concepts, software, applications
– Anything written by David Montgomery, Kellen Whipple, or their grad students

Its great to hear from faculty that are using the website. A quick email will help me better understand who’s out there and what you find useful. Thanks in advance. Contact Us

Ask a Question or Contribute a Lesson
Please Contact Us if you have a question, lesson, suggestion, or tool to contribute. Check out the growing list of Contributors, too. Thanks everybody!

Keeping It Simple
As Editor, I’ve chosen to keep things simple in order to reach a wider audience (mostly grad students). Nearly all lessons utilize standard 10m or 30m DEMs, but many of the methods will translate to LiDAR elevation data with certain caveats. Instructions are for ArcGIS 10.x, the Spatial Analyst extension, and the 3D Analyst extension. In places, program R code, GME details, or Excel examples are included. Relevant journal articles, books, and websites are referenced at the end of each lesson.

Why Not Allow Comments?
I prefer to correspond directly with people via email. Comments are great for large websites that get hundreds of thousands of visitors, but not so great for small sites like this one. I am uninterested in moderating online comments. G4G is still small enough to treat people as people. If you write me, I’ll get back to you.

Referenced Articles
We try to cite pertinent journal articles, books, websites, and online videos that discuss the central concept of each lesson. Referenced works contain the full equations & calculations or present an alternative method. We try to be comprehensive and transparent, but sometimes miss things. Please let us know if we have overlooked a key article (or one of yours).

Please Reference Us
Please reference us in your manuscripts and presentations.

GSA Style:
Cooley, S.W., 2013, GIS4Geomorphology: http://www.gis4geomorphology.com (Accessed June 1, 2013)

APA Style:
Cooley, S.W. (January 1, 2010). Watershed Delineation Lesson. In www.GIS4Geomorphology.com. Retrieved June 1, 2013, from http://www.gis4geomorphology.com/watershed

Why Not Just Write Code?
Code ninjas will certainly devise more efficient ways to accomplish everything on the site. I encourage students to learn to code. Any science-oriented programming software will do. Start with MatLab, Python, R, or even HTML/CSS. Coding skills quicken the pace of discovery and can offer something to fall back on in a lousy job market. Coding skills are valuable and the software is readily available to students. When the opportunity arises to learn a little code, seize it. Just a little interested? Read the Preface of this book: htdp.org.

‘STEAM’ not ‘STEM’
Adding a little art to science makes all the difference. The best scientists know this. Art makes mediocre minds uncomfortable. Avoid graduate advisers who lack artistic skills and a drive to create from scratch. And avoid Utah State; there are better choices out there.

This website is under constant revision and user feedback is always welcome. I receive emails from folks all over the world regularly. New lessons are added and old ones are updated as time allows. If something isn’t clear, its probably because no one is actively working on it. Instructions improve when someone writes us in need of help.

Tips & Fixes for ArcGIS
See the Tips & Fixes post for ways to improve your workflow in ArcGIS.

All photographs on the site are my own unless otherwise noted. Most were collected during trips and climbs in the Rocky Mountain West.

Contact the Editor
Send a message to Skye Cooley, G4G Editor >> CONTACT FORM
More about Skye >> HERE
A few examples of past work >> HERE