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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. - PowerPoint PPT Presentation
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Dept. of Geosciences – Oregon State UniversityRon Rinehart
Dr. Dawn WrightEmily Lundblad
Emily Larkin
NOAA - Coastal Services CenterJosh Murphy
Lori Cary-Kothera
The Benthic Terrain Modeler for Terrain Classification and
Visualization of American Samoa Multibeam Data
2
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
3
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?
4
Which Spatial Analysis Algorithms?
Slope
Multi-Scale Bathymetric Position Index
Rugosity
5
Bathymetric Position Index – How it Works
Hilltop
ValleyCoarse BPI
Ridge Crest
Stream Channel
Middle
Fine BPI
6
Bathymetric Position Index
SlopeSloped Surface
Composite BPI
Stream Valley on aSloping Hillside
7
Rugosity
8
How does it work?
Fine BPI+
+
+
Coarse BPI
Slope
Rugosity(derived
frombathymetr
y)
Step One Step Two Step Three Step Four
Bathymetry
BiodiversityEnhanced
Benthic Zones?
Composite BPI
9
How does one use the BTM tool?
10
How does one use the BTM tool?
11
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
12
Computer System Requirements?
• ArcGIS 8.x with Spatial Analyst• Fast processor >2.0 Ghz
recommended• Up to a gigabyte of hard drive
space• Rasters need to be ESRI GRID
format:: These are guidelines. As
raster size increases so does processing time::
13
Why is this tool needed?
Images Courtesy of NOAA – Wave of the Future Calendar
14
Who will use the BTM?
User PurposeFagatele Bay
National Marine Sanctuary
Management
American Samoa Department of
Marine and Wildlife Resources
Management
American Samoa Community College
Education
Oregon State University
Research
15
Example from Vatia Bay
16
17
Bathymetry of Vatia Bay
18
19
BPI of Vatia Bay
Coarse BPI Fine BPI
20
Benthic Terrain Classes of Vatia Bay
21
22
Profile Analysis
Image Courtesy of NOAA Biogeography
Reef Cres
tForere
ef
Shelf
Reef Cres
t
Shelf
Forereef
23
Benthic Terrain of Vatia Bay
24
Rugosity of Vatia Bay
25
Rugosity of Vatia Bay
26
Is it Useful?
Data need to be ‘ground-truthed’
Mission scheduled for 2005
Potential for including Aspect
Potential for Backscatter
27
When and where will it be available?
When: October 2004
Where:
http://dusk.geo.orst.edu/
djl/samoa
Mirror at NOAA CSC
28
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
29
When and where will it be available?
When: October 2004
Where:
http://dusk.geo.orst.edu/
djl/samoa
Mirror at NOAA CSC
