Transcript Benthic Terrain Modeler - Oregon State University

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
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
2
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?
3
Which Spatial Analysis Algorithms?
Slope
Multi-Scale Bathymetric Position Index
Rugosity
4
Bathymetric Position Index – How it Works
Hilltop
Middle
Valley
Coarse BPI
Ridge Crest
Fine BPI
Stream Channel
5
Bathymetric Position Index
Sloped Surface
Composite BPI
Slope
Stream Valley on a
Sloping Hillside
6
Rugosity
7
How does it work?
Step One
Step Two
Slope
Bathymetry
+
Fine BPI
Step Four
Step Three
Biodiversity
Enhanced
Benthic Zones?
Composite BPI
+
+
Coarse BPI
Rugosity
(derived from
bathymetry)
8
How does one use the BTM tool?
9
How does one use the BTM tool?
10
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
11
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::
12
Why is this tool needed?
13
Images Courtesy of NOAA – Wave of the Future Calendar
Who will use the BTM?
User
Fagatele Bay National
Marine Sanctuary
American Samoa
Department of Marine and
Wildlife Resources
American Samoa
Community College
Oregon State University
Purpose
Management
Management
Education
Research
14
Example from Vatia Bay
15
16
Bathymetry of Vatia Bay
17
18
BPI of Vatia Bay
Coarse BPI
Fine BPI
19
Benthic Terrain Classes of Vatia Bay
20
21
Profile Analysis
Forereef
Reef
Crest
Shelf
Reef
Crest
Forereef
Shelf
22
Image Courtesy of NOAA Biogeography
Benthic Terrain of Vatia Bay
23
Rugosity of Vatia Bay
24
Rugosity of Vatia Bay
25
Is it Useful?
Data need to be ‘ground-truthed’
Mission scheduled for 2005
Potential for including Aspect
Potential for Backscatter
26
When and where will it be available?
When: October 2004
Where:
http://dusk.geo.orst.edu/djl/samoa
Mirror at NOAA CSC
27
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
28
When and where will it be available?
When: October 2004
Where:
http://dusk.geo.orst.edu/djl/samoa
Mirror at NOAA CSC
29