Dept. of Geosciences – Oregon State University Ron Rinehart Dr. Dawn Wright Emily Lundblad Emily Larkin NOAA - Coastal Services Center Josh Murphy Lori Cary-Kothera The Benthic Terrain Modeler for Terrain Classification and Visualization of American Samoa Multibeam Data
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Dept. of Geosciences – Oregon State University Ron Rinehart Dr. Dawn Wright Emily Lundblad
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
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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::
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Why is this tool needed?
Images Courtesy of NOAA – Wave of the Future Calendar