Department of Commerce (DOC), National Oceanic and Atmospheric Administration (NOAA), National Ocean Service (NOS), National Centers for Coastal Ocean Sciences (NCCOS), Center for Coastal Monitoring and Assessment (CCMA)
Analytical Laboratories of Hawaii
2012
Benthic Habitats of American Samoa Derived from Sonar and IKONOS Imagery, 2001-2012
version 2.1
vector digital data
Silver Spring, Maryland
NOAA's Ocean Service, National Centers for Coastal Ocean Science (NCCOS)
Department of Commerce (DOC), National Oceanic and Atmospheric Administration (NOAA), National Ocean Service (NOS), National Centers for Coastal Ocean Science (NCCOS), Center for Coastal Monitoring and Assessment (CCMA), Biogeography Program
2012
Shoreline to Shelf Edge Benthic Habitat Map of Tutuila, American Samoa Prepared by Visual Interpretation from Remote Sensing Imagery
version 2.1
map
Silver Spring, MD
NOAA's Ocean Service, National Centers for Coastal Ocean Science (NCCOS)
This project is a cooperative effort between the National Ocean Service, National Centers for Coastal Ocean Science, Center for Coastal Monitoring and Assessment, Biogeography Branch, the Pacific Islands Benthic Mapping Center, the National Marine Fisheries Service, Pacific Islands Fishery Science Center, Coral Reef Ecosystem Division, University of Hawaii, BAE Spectral Solutions, and Analytical Laboratories of Hawaii, LLC. The goal of the work was to map the coral reef habitats from shoreline to shelf edge of Tutuila, American Samoa by visual interpretation and manual delineation of sonar and IKONOS satellite imagery. A three part habitat classification system was used. Benthic features were mapped as polygons and labeled with geomorphologic structure, reef zone, and percent hard bottom attributes.
The National Ocean Service is digitally mapping biotic resources to support long-term monitoring programs and detect and predict change in U.S. coral reefs, and their associated habitats and biological communities.
2002
2010
ground condition
None planned
-170.92905
-170.48096
-14.19588
-14.38429
NCEI Geoportal FilterCoRIS_Metadata
None
coral reef
habitat
reef
submerged aquatic vegetation
unconsolidated sediments
zone
structure
NOS Topic Keyword
Remotely Sensed Imagery/Photos
CoRIS Discovery Thesaurus
Geographic Information > Habitats
CoRIS Theme Thesaurus
EARTH SCIENCE > Oceans > Coastal Processes > Coral Reefs > Coral Reef Ecology > Habitats
EARTH SCIENCE > Biosphere > Aquatic Habitat > Benthic Habitat
EARTH SCIENCE > Biosphere > Zoology > Corals > Reef Monitoring and Assessment > Mapping > Habitat Mapping
ISO 19115 Topic Category
imageryBaseMapsEarthCover
010
CRCP Project
AS240 Creating comprehensive shore to shelf edge reef ecosystem maps of Tutuila, American Samoa
20720
None
United States
American Samoa
Tutuila
CoRIS Place Thesaurus
OCEAN BASIN > Pacific Ocean > American Samoa > Tutuila Island (14S170W0016)
COUNTRY/TERRITORY > United States of America > American Samoa > American Samoa > Tutuila Island (14S170W0016)
CoRIS Region
AmSam
None
Not for navigation
National Oceanic and Atmospheric Administration (NOAA), National Ocean Service (NOS), National Centers for Coastal Ocean Science (NCCOS), Center for Coastal Monitoring and Assessment (CCMA), Biogeography Program
Biogeography Branch, Marine Biologist
mailing and physical address
1305 East West Highway
Silver Spring
MD
20910
301-713-3028
301-713-4384
matt.kendall@noaa.gov
0800 - 1700, Monday to Friday, EST
Matt Kendall, NOAA and Miles Anderson, Analytical Laboratories of Hawaii
Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 1; ESRI ArcCatalog 9.0.0.535
To assess the thematic accuracy of the sonar portion of the maps, an independent field data set originally collected for a fishery assessment, was made available by scientists from the Department of Marine and Wildlife Resources in American Samoa (R. Tulafono, D. Ochavillo, M. Sabater, E. Simonsen, E. Schuster, T. Letalie). Each site consisted of GPS coordinates and several minutes of video data of the seafloor. Useable data were acquired for 77 points and compared to the attributes of the map polygons at each site to check thematic accuracy.
A statistical analysis that generated a Tau statistic was preformed. The Tau statistic for the major classes exceeded 0.94 and for detailed classes exceeded 0.93. Overall thematic accuracy was established as 97.4% and 93.5% for the major and detailed structure classes respectively. A separate accuracy assessment was conducted for the shallow water-IKONOS based portion of the map that yielded similar results.
All mapping was conducted from sonar and orthorectified IKONOS satellite imagery. IKONOS satellite imagery was corrected for atmospheric and water column effects, color balanced, pan sharpened and deglinted. During the digitizing process, image stretches and manipulating image contrast, brightness and color balance were performed in the ArcView Image Analysis Extension to enhance features in the processed imagery. Sonar imagery and derived datasets were downloaded from http://www.soest.hawaii.edu/pibhmc/.
Sonar based maps were edge matched to the IKONOS based maps and GIS topologic quality was established by executing ArcView extension routines that check for: overlapping polygons, multipart polygons, sliver polygons and void polygons. Additionally checks for adjacent polygons with the same habitat attributes were completed. All errors were identified and corrected. This file is believed to be logically consistent.
Delineation of all habitat boundaries was conducted with the image scale at 1:6,000 for IKONOS and 1:10,000 for sonar. The minimum mapping unit (MMU) for identifying habitats or features was 1 acre.
Horizontal accuracy of the benthic maps is inherited from the source imagery. For example, RMS from digitized output based on IKONOS was determined using the ESRI RMEer2 extension and shown to be <1m when conducted at 1:6000 scale.
M.S. Coyne
2003
Classification Scheme for Benthic Habitats of the Pacific
document
Silver Spring, MD
NOAA's Ocean Service, National Centers for Coastal Ocean Science (NCCOS)
http://products.coastalscience.noaa.gov/collections/benthic/e99us_pac/
Report
2003
publication date
Classification Scheme for Benthic Habitats of the Pacific
This document identified the zone, structure and biological cover types attributed in the data set
Ken Buja
2003
Coral Reef Digitizing Extension
Silver Spring, MD
NOAA's Ocean Service (NOS), National Centers for Coastal Ocean Science (NCCOS)
https://coastalscience.noaa.gov/projects/detail?key=203
computer program
2003
publication date
Habitat Digitizer
This ArcView extension was used to digitize and attribute benthic zones, structure and percent hard bottom of this map.
Space Imaging Inc.
2003
IKONOS Satellite Imagery
remote-sensing image
Thornton, CO
Space Imaging Inc.
This imagery was obtained at a 4 m pixel resolution, corrected for water column and atmospheric effects, deglinted and Pan sharpened.
CD-ROM
2001
2003
ground condition
IKONOS imagery
Used to identify and digitize benthic habitats for American Samoa.
Pacific Islands Benthic Habitat Mapping Center
2006
Sonar imagery and derived products for Tutuila
remote-sensing image
Honolulu, HI
PIBHMC
Sonar bathymetry was obtained at 5 m pixel resolution and backscatter was collected 1 m resolution.
http://www.soest.hawaii.edu/pibhmc/
online arcGIS files
2002
2006
ground condition
Sonar imagery
Used to identify and digitize benthic habitats for American Samoa.
Department of Marine and Wildlife Resources, American Samoa
2010
Drop Camera Videos for Fisheries Assessment
video
Pago Pago, AS
Department of Marine and Wildlife Resources, American Samoa
Video of sea floor features collected with GPS coordinate stamp.
video files
2009
2010
ground condition
Drop camera video
Used to determine thematic accuracy of benthic habitat maps.
Benthic habitat maps were digitized by delineating habitat boundaries from georeferenced sonar and orthorectified IKONOS satellite imagery loaded into ArcGIS software with the NOAA Habitat Digitizing extension activated. Digitizing was conducted using on computer screen methods with the minimum mapping unit (MMU) set to 1 acre and the image scale at 1:6,000 for IKONOS and 1:10,000 for sonar.
A first draft map was completed and features in the imagery where uncertainties existed, due to confusing or difficult to interpret signatures, were identified for ground validation. An ArcGIS point theme was generated with points positioned on the features of uncertain habitat type or along transects though gradients between habitat types. The GIS points were converted to GPS waypoints and were navigated to in the field using a Trimble GeoExplorer 3 GPS data logger.
A benthic habitat characterization was conducted at each site by drop camera, free diving, or where water depth and clarity permitted, by observation from the surface. GPS data were collected at each location and site ID, depth, habitat type, zone and the method used to make the assessment were recorded. A second draft of the map was generated incorporating these ground validation data.
The sonar and satellite based maps were edge matched primarily by clipping out any areas of overlap and retaining the sonar derived map. Polygon edges were merged where attributes matched and seams corrected for any inconsistencies.
2011
Matt Kendall
National Oceanic and Atmospheric Administration (NOAA), National Ocean Service (NOS), National Centers for Coastal Ocean Science (NCCOS), Center for Coastal Monitoring and Assessment (CCMA), Biogeography Program
mailing address
1305 East-West Highway
Silver Spring
MD
20910
301-713-3028
301-713-4388
Metadata imported.
2011
Vector
G-polygon
2089
Universal Transverse Mercator
-2
0.999600
-171.000000
0.000000
500000.000000
10000000.000000
coordinate pair
0.001024
0.001024
meters
D_North_American_1983_HARN
Geodetic Reference System 80
6378137.000000
298.257222
tutuila_shore_to_shelfedge_final
Shapefile attribute table
None
FID
Internal feature number.
ESRI
ESRI
Shape
Feature geometry.
ESRI
Coordinates defining the features.
OBJECT_ID
Incremental value generated for QA/QC adjacency test
ArcView script
Incremental numeric field
ZONE_
Geomorphologic zone
Habitat classification scheme
Assigned during digitizing character field
M_STRUCT
Major reef structure
Habitat digitizing extension
Assigned during digitizing character field
D_STRUCT
Detailed structure
Habitat digitizing extension
Assigned during digitizing character field
P_HARD
Percent hard bottom in the polygon
Habitat classification scheme
Assigned during digitizing character field
Shape_area
Area of polygon
ArcGIS script
10.03
200389160.20
NA
Shape_leng
Length of polygon
ArcGIS script
13.84
925134.59
NA
National Oceanic and Atmospheric Administration (NOAA), National Ocean Service (NOS), National Centers for Coastal Ocean Science (NCCOS), Center for Coastal Monitoring and Assessment (CCMA), Biogeography Program
Biogeography Branch, Marine Biologist
mailing and physical address
1305 East West Highway
Silver Spring
MD
20910
301-713-3028
301-713-4384
matt.kendall@noaa.gov
0800 - 1700, Monday to Friday, EST
Downloadable Data
The National Oceanic and Atmospheric Administration (NOAA) National Centers for Coastal Ocean Science (NCCOS) produced this data CD-ROM. NCCOS Biogeography Program does not guarantee the accuracy of the geographic features or attributes. Please see the metadata records for each data set for complete information on the source, limitations, and proper use.
Shapefile
https://www.ncei.noaa.gov/data/oceans/coris/data/NOAA/nos/Tutuila_shore_to_shelf_edge/Tutuila_shore_to_shelf_edge.zip
None
Contact NOAA for distribution options (see Distributor). All maps of American Samoa prepared during this tenure are incorporated into this metadata summary.
20230629
20120518
National Oceanic and Atmospheric Administration (NOAA), National Ocean Service (NOS), National Centers for Coastal Ocean Science (NCCOS), Center for Coastal Monitoring and Assessment (CCMA), Biogeography Program
mailing and physical address
1305 East West Highway
Silver Spring
MD
20910
301-713-3028
301-713-4384
matt.kendall@noaa.gov
0800 - 1700, Monday to Friday, EST
FGDC Content Standards for Digital Geospatial Metadata
FGDC-STD-001-1998
local time
http://www.esri.com/metadata/esriprof80.html
ESRI Metadata Profile
20120518065526
None
20020101
20101231
https://www.coris.noaa.gov/metadata/records/html/tutuila_shore_to_shelf_edge_shp.html
6481