Introduction to Geographic Information Systems in Forest Resources
UW Home GIS@UW Search
Syllabus Schedule Class Meetings Assignments Course Data
Contact Us CFR 520 Lab Locations Software Collect It Page

Example 5

Example 5: How can watershed analysis data be generated within a GIS?
"What are the road and stream densities (mi / sq. mi) for the forest area?

First, we eliminate roads and streams that are not within the forest area. This image shows streams and roads clipped to the administrative boundary of Pack Forest.

Then we summarize the forest area (in square miles) and summarize the stream and road length (in miles).

The quotient of (stream length / forest area) is the stream density, and
(road length / forest area) is the road density:

area

length

 density
forest

 6.67 mi ^2
 roads

54 mi

 8.13 mi / mi^2
 streams

31 mi

4.62 mi / mi^2

 

Return to top   

Syllabus Schedule Class Meetings Assignments Course Data
Contact Us CFR 520 Lab Locations Software Collect It Page
 

The University of Washington Spatial Technology, GIS, and Remote Sensing Page is supported by the School of Forest Resources
School of Forest Resources