1. Barbara Tewksbury Hamilton College
Microplates in the SW Pacific analyzing geophysical, DEM, and bathyDEM data sets and creating a topologically valid plate boundary map for the Woodlark Basin region
Barbara Tewksbury
Hamilton College

2. Context Semester course GIS for Geoscientists
About midway through the course
Assumes following knowledge/skill
Distinguishing characteristics of plate boundaries
Coordinate systems/projections
Manipulating layers
Hillshading
Working with rasters and shapefiles
Map layout/cartography

3. Purpose: geological
Analyze plates and plate boundaries in Woodlark Basin Region

4. Purposes: GIS Use multiple data sets Calculate and use Z factor
Add XYZ data from spreadsheet and portray in ArcScene
Georeferencing
Create a geodatabase and make a topologically valid geologic map
Create a beeyootiful and cartographically correct map
Poster with map plus evidence

5. Multiple data sets
Students download from original data sources and prep for hw
NOAA etopo1 bathy/topo DEM
SRTM DEM
EQ data from USGS EQ Hazards Prog.
Volcanoes from Smithsonian Global Volcanism Project
World continents shapefile
Other data sets (from course server)
Higher res bathyDEM of Woodlark Basin
Jpegs with ocean floor ages and plate motion vectors (to be georeferenced)

6. Phase 1: preparation of a base map and ArcScene visualization
Combination of three DEMs to give regional coverage, detail, and land/ocean distinction

7. Phase 2: analysis of plate boundary types and locations
Earthquake data from search > Excel > ArcScene

8. Phase 2: analysis of plate boundary types and locations
Volcanism from Excel; seafloor ages, plate motion vectors georeferenced, hillshaded DEMs

9. Phase 3: preparation of a regional plate map
Plate/boundaries as shape files - limitations
Plate/boundaries in geodatabase with topological analysis; lines to polygons