Benthic Terrain Modeler

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The Benthic Terrain Modeler for Terrain
Classification and Visualization of American
Samoa Multibeam Data
Dept. of Geosciences Oregon State
University Ron Rinehart Dr. Dawn Wright Emily
Lundblad Emily Larkin NOAA - Coastal Services
Center Josh Murphy Lori Cary-Kothera
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What is the BTM?

• BTM Benthic Terrain Modeler
• Standalone program compatible with ArcGIS 8.x
• Converts bathymetry into a user defined
• classification system
• Combination of spatial analysis algorithms

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Key Questions about the BTM Tool?
What is it? How does one use the BTM tool? What
are the key features? What are the computer
system requirements? Why is this tool needed? Who
will use it? Where will this tool be used? Is it
a useful tool? When will it be available?
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Which Spatial Analysis Algorithms?
Slope Multi-Scale Bathymetric Position
Index Rugosity
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Bathymetric Position Index How it Works
Hilltop
Middle
Coarse BPI
Valley
Ridge Crest
Fine BPI
Stream Channel
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Bathymetric Position Index
Sloped Surface
Slope
Stream Valley on a Sloping Hillside
Composite BPI
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Rugosity
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How does it work?
Step Four
Step Two
Step Three
Step One
Slope
Biodiversity Enhanced Benthic Zones?

Composite BPI
Bathymetry
Fine BPI


Coarse BPI
Rugosity (derived from bathymetry)
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How does one use the BTM tool?
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How does one use the BTM tool?
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BTM Key Features?

• Wizard Interface
• Learn More Buttons
• Re-use intermediate results
• Re-sampler built in to save time
• Classification Dictionary
• Dictionary files are XML
• Skip the Wizard Go Straight to the Desired
  Process

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Computer System Requirements?

• ArcGIS 8.x with Spatial Analyst
• Fast processor gt2.0 Ghz recommended
• Up to a gigabyte of hard drive space
• Rasters need to be ESRI GRID format

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Why is this tool needed?
Images Courtesy of NOAA Wave of the Future
Calendar
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Who will use the BTM?
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Example from Vatia Bay
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Bathymetry of Vatia Bay
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BPI of Vatia Bay
Coarse BPI
Fine BPI
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Benthic Terrain Classes of Vatia Bay
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Profile Analysis
Reef Crest
Forereef
Shelf
Reef Crest
Shelf
Forereef
Image Courtesy of NOAA Biogeography
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Benthic Terrain of Vatia Bay
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Rugosity of Vatia Bay
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Rugosity of Vatia Bay
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Is it Useful?
Data need to be ground-truthed Mission
scheduled for 2005 Potential for including Aspect
Potential for Backscatter
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When and where will it be available?
When October 2004 Where http//dusk.geo.orst.edu
/djl/samoa Mirror at NOAA CSC
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Thanks Acknowledgements
NOAA Coastal Services Center Integration and
Development Initiative, Grant NA03NOS4730014
Oregon State University McNair Scholars Program
Programming Team from NOAA CSC Jeff Jenness
Andy Weiss Pat Iampietro and Rikk Kvitek
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When and where will it be available?
When October 2004 Where http//dusk.geo.orst.edu
/djl/samoa Mirror at NOAA CSC