# SpatialAnalysis Case Study - Computer Science

Spatial Analysis A Case Study Patrick Kish Class project for Resource Management 591 West Virginia University 14 Dec 2001 CS 128/ES 228 - Lecture 13b 1 Problem

Landslides are present in certain areas of West Virginia Question: How much of a determinant is land slope in this matter? CS 128/ES 228 - Lecture 13b

2 Where to begin? West Virginia Landslide and Slide Prone Areas map Paper only so scanned in CS 128/ES 228 - Lecture 13b

3 What to add? DEMs available at different resolutions 10 meter and 30 meter resolution DEMs imported

Also a Geology map and a DOQQ CS 128/ES 228 - Lecture 13b 4 Adding relevant data Landslide

polygons added through heads up digitization Attribute table used for determining area of slides CS 128/ES 228 - Lecture 13b 5 Hypothesis

Slope has something to do with the prevelance of landslides Literature suggests that 35 degrees is a critical value CS 128/ES 228 - Lecture 13b 6

Getting Slope Information ArcMaps Spatial Analysis was applied to DEMs Slope shown by color degree values in Table of Contents CS 128/ES 228 - Lecture 13b

7 30 meter resolution CS 128/ES 228 - Lecture 13b 8 10 meter resolution CS 128/ES 228 - Lecture 13b

9 More interesting analysis Intersecting slope map with slide polygons layer allows us to determine average slope of a slide Determined to be 34.81 degrees

CS 128/ES 228 - Lecture 13b 10 Further filtering 10 m CS 128/ES 228 - Lecture 13b 11 Further filtering 30 m CS 128/ES 228 - Lecture 13b

12 Final product What layers should be included? How should they be arranged? CS 128/ES 228 - Lecture 13b

13 A Useful Map? CS 128/ES 228 - Lecture 13b 14 Intriguing Questions Why doesnt 30 m map do better?

What role does geology play? What about soil type? CS 128/ES 228 - Lecture 13b 15 BIBLIOGRAPHY

All figures (and details about the study) were taken from: http://www.nrac.wvu.edu/rm493-591/fall2001/students/kish/ The%20Use%20of%2010%20Meter%20 and%2030%20Meter%20Digital%20Elevation%20Models%20for%20Determining%20Areas%20Susc eptible%20to%20Landsliding%20in%20the%20Morgantown%20N.htm Alas, as with so much data on the Internet, this has proven transitory. A Google search will find this URL for you, but the only remaining record is a Masters thesis on the subject which is only available from

on the WVU campus. CS 128/ES 228 - Lecture 13b 16

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