Selecting out ridgelines from a DEM using ArcView 3x’s Spatial Analyst extension is pretty straightforward. These steps assume the initial DEM is called “elev”. Time … Read more
For general reference material on GIS, try a very good technical bookstore (in many cases these are campus bookstores at schools with good GIS programs … Read more
This document describes how to acquire, install and configure a powerful scientific public-domain Geographic Information System (GIS): the Geographic Resources Analysis Support System (GRASS). It provides information on other resources for learning more about GRASS and GIS in general.