Schedule Day 1, Mon

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Schedule - Day 1, Mon

• 830-930 - Dawn - Intro
• 930-1000 Break - Technical Setup
• 1000-1200 Emily/Dawn - Module 1 Exploring
  the Reefs
• all modules include intro lecture, then hands-on
  work
• 1200-100 Lunch
• 130-230 Dawn Seafloor mapping techniques
  and GIS analysis
• 230-430 Emily/Dawn Module 2 Benthic
  Classifications

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http//dusk.geo.orst.edu/djl/samoahttp//dusk.geo
.orst.edu/djl/samoa/ascc
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GIS Terrain Analysis
Dawn Wright Department of Geosciences Oregon
State University
Photo by
ASCC GIS Workshop, September, 2004
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NOAA BiogeographyBenthic Habitat from Ikonos
By OrSt grad student Emily Lundblad
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Fagatele Bay National Marine Sanctuary, 2001 bathy
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Terrain AnalysisBathymetric Position
Index(from TPI, Jones et al., 2000, Weiss, 2001)
Measure of where a point is in the overall land-
or seascape Compares elevation of cell to mean
elevation of neighborhood
Hilltop
Middle
Coarse BPI
Bottom
Ridge Crest
Fine BPI
Lava Channel
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BPI Zone and Structure Classification Flowchart
Emily Lundblad, OrSt M.S. Thesis
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Emily Lundblad, OrSt M.S. Thesis
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From Greene, Bizarro et al., in press, 2004, The
benefits and pitfalls of GIS in marine benthic
habitat mapping, in Wright, D.J. and Scholz, D.J.
(eds.), Place Matters Geospatial Tools for
Marine Science, Conservation, and Management in
the Pacific Northwest, Corvallis, OR Oregon
State University Press.
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Terrain AnalysisRugosity

• Measure of how rough or bumpy a surface is, how
  convoluted and complex
• Ratio of surface area to planar area

Surface area based on elevations of 8 neighbors
3D view of grid on the left
Center pts of 9 cells connected To make 8
triangles
Portions of 8 triangles overlapping center
cell used for surface area
Graphics courtesy of Jeff Jenness, Jenness
Enterprises, and Pat Iampietro, CSU-MB
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Emily Lundblad, OrSt M.S. Thesis
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http//dusk.geo.orst.edu/djl/samoahttp//dusk.geo
.orst.edu/djl/samoa/ascc
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