39245 as_benthic_habitats Data Set Published / External 37194 Pac_Terr Project Completed 2004 This project is a cooperative effort among the National Ocean Service, National Centers for Coastal Ocean Science, Center for Coastal Monitoring and Assessment; the University of Hawaii; BAE Systems Spectral Solutions; and Analytical Laboratories of Hawaii, LLC. The goal of the work was to map the coral reef habitats of American Samoa, Guam and the Common Wealth of the Northern Mariana Islands by visual interpretation and manual delineation of IKONOS satellite imagery. A two tiered habitat classification system was tested and implemented in this work. It integrates geomorphologic reef structure and biological cover into a single scheme and subsets each into detail. It also includes thirteen zones. Benthic features were mapped that covered an area of 71.5 square kilometers of which 10.56 were unconsolidated sediment and 60.94 were coral reef and hard bottom. Of the coral reef and hard bottom class, 62.8% is colonized by greater than 10% coral cover. The National Ocean Service is conducting a map production effort to digitally map biotic resources and coordinate a long-term monitoring program that can detect and predict change in U.S. coral reefs, and their associated habitats and biological communities. 584 Theme ISO 19115 Topic Category biota Theme ISO 19115 Topic Category environment Theme ISO 19115 Topic Category oceans Theme coral reef Theme coralline algae Theme cover Theme environmental monitoring Theme habitat Theme reef Theme structure Theme submerged aquatic vegetation Theme unconsolidated sediments Theme zone Spatial American Samoa Spatial Manua Spatial Rose Atoll Spatial Swains Island Spatial Tutuila Spatial United States National Centers for Coastal Ocean Science Silver Spring MD Data Set None Planned vector digital data The National Oceanic and Atmospheric Administration (NOAA) National Centers for Coastal Ocean Science (NCCOS) produced this data CD-ROM. NCCOS Biogeography Branch 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. 41228 as_benthic_habitats_final Published / External Completed Shapefile attribute table | Description Source: None Converted from FGDC using 'fgdc_to_inport_xml_entity.pl' script. 1 FID Unknown No No Active Internal feature number. | Description Source: ESRI ESRI 2 Shape Unknown No No Active Feature geometry. | Description Source: ESRI Coordinates defining the features. 3 ID VARCHAR No No Active Value copied from UNIQUID field and used to run adjacency script for QA/QC | Description Source: NOAA mapping QA/QC standard Habitat description: Habitat classification scheme for the Pacific 4 UNIQUEID VARCHAR No No Active 4 digit numerical value representing a unique habitat combination of structure and cover attributes | Description Source: Habitat digitizing extension Habitat description: Habitat classification scheme for the Pacific 5 POLYGONID Unknown No No Active Incremental value generated for QA/QC adjacency test | Description Source: ArcView script Incremental numeric field 6 AREA NUMBER No No Active Area of polygon | Description Source: ArcView script NA 10.31 - 162605543.23 7 PERIMETER NUMBER No No Active Perimeter of polygon | Description Source: ArcView script NA 13.84 - 165991.33 8 ACRES NUMBER No No Active Area of polygon in acres | Description Source: ArcView script NA 0.003 - 40179.83 9 ISLAND Unknown No No Active Name of Island | Description Source: Manually assigned string Manually assigned character field 10 M_STRUCT Unknown No No Active Major reef structure | Description Source: Habitat digitizing extension Assigned during digitizing character field 11 D_STRUCT Unknown No No Active Detailed structure | Description Source: Habitat digitizing extension Assigned during digitizing character field 12 M_COVER Unknown No No Active Major biological cover | Description Source: Habitat classification scheme Assigned during digitizing 13 P_COVER Unknown No No Active Percent biological cover of major cover type | Description Source: Habitat classification scheme Assigned during digitizing character field 14 ZONE Unknown No No Active Geomorphologic zone | Description Source: Habitat classification scheme Assigned during digitizing character field 15 COVER_TYPE Unknown No No Active Concatenated field of major cover and percent cover used for legend fill | Description Source: ArcView script Character field Data Steward 2004 Position NCCOS Scientific Data Coordinator NCCOS.data@noaa.gov Distributor 2004 Position NCCOS Scientific Data Coordinator NCCOS.data@noaa.gov Metadata Contact 2004 Position NCCOS Scientific Data Coordinator NCCOS.data@noaa.gov Point of Contact 2004 Position NCCOS Scientific Data Coordinator NCCOS.data@noaa.gov Principal Investigator 2004 Person Battista, Tim tim.battista@noaa.gov Ground Condition -171.097729 -168.131603 -11.028525 -14.582271 Range 2002 2004 Yes Yes 1392 Unclassified Contact NOAA for distribution options (see Distributor). All maps of American Samoa prepared during this tenure are incorporated into this metadata summary.; None Not for navigation https://coastalscience.noaa.gov/datasets/ccma/biogeo/us_pac_terr/habitats/manua_habitat.zip Downloadable Data shapefile Shapefile https://coastalscience.noaa.gov/datasets/ccma/biogeo/us_pac_terr/habitats/rose_habitat.zip Downloadable Data shapefile Shapefile https://coastalscience.noaa.gov/datasets/ccma/biogeo/us_pac_terr/habitats/swains_habitat.zip Downloadable Data shapefile Shapefile https://coastalscience.noaa.gov/datasets/ccma/biogeo/us_pac_terr/habitats/tutuila_habitat.zip Downloadable Data shapefile Shapefile https://ccma.nos.noaa.gov/ecosystems/coralreef/us_pac_terr/data/ Online Resource https://ccma.nos.noaa.gov/ecosystems/coralreef/us_pac_terr/data/habitats.aspx Online Resource 2014-07-09 Date that the source FGDC record was last modified. 2017-04-05 Converted from FGDC Content Standards for Digital Geospatial Metadata (version FGDC-STD-001-1998) using 'fgdc_to_inport_xml.pl' script. Contact Tyler Christensen (NOS) for details. 2017-09-13 Partial upload of Spatial Info section only. 2017-11-01 Replaced entire Lineage section to populate new Source Contribution field. 2018-02-08 Partial upload of Positional Accuracy fields only. Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 1; ESRI ArcCatalog 9.0.0.535 A statistically robust field data set was collected to assess the thematic accuracy of the map products. A random stratified sampling method was implemented to select field sites to conduct this test. Each site was navigated to using a Trimble Geo Explorer 3 GPS data logger, and positional data was acquired. A total of 613 GPS waypoints were occupied and benthic characterizations conducted for the purpose of accuracy assessment. A statistical analysis that generated a Tau statistic was preformed. The Tau statistic for the major classes exceeded 0.85 and for detailed classes exceeded 0.75. Overall thematic accuracy was established as 98.0% and 87.6 for the major structure and cover classes and 84.0% and 75.5% for the detailed classes respectively. RMS from digitized output was determined using the ESRI RMEer2 extension and shown to be <1m when conducted at 1:6000 scale. NOAA supplied georeferenced imagery to Analytical Laboratories of Hawaii through BAE Systems Spectral Solutions. Delineation of all habitat boundaries was conducted with the image scale at 1:6,000. This ensures that the level of detail produced by the photo interpreter is uniform throughout the project. Also, NOAA has shown from similar mapping efforts in the Caribbean and Florida Keys, that little additional information is gained from having the image at a smaller scale and the labor intensity increased significantly.The minimum mapping unit (MMU) for identifying habitats or features was 1 acre. The software utilized in this project was designed to alert the photo interpreter each time a polygon was drawn smaller than the MMU. When this occurred the photo interpreter has the choice whether to include the polygon in the data set. Only in areas where local coral reef managers expressed interest in specific map classes or in Marine Protected Areas were polygons of smaller then the MMU allowed. All mapping was conducted from orthorectified IKONOS satellite imagery provided by NOS prior to map production. 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. 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. Classification Scheme for Benthic Habitats of the Pacific M.S. Coyne 2003-01-01 Discrete 2003 https://ccma.nos.noaa.gov/ecosystems/coralreef/us_pac_terr/html/manual.pdf This document identified the zone, structure and biological cover types attributed in the data set | Source Geospatial Form: document | Type of Source Media: Report Coral Reef Digitizing Extension Ken Buja 2003-01-01 Discrete 2003 https://ccma.nos.noaa.gov/ecosystems/coralreef/us_pac_terr/html/manual.pdf This ArcView extension was used to digitize and attribute benthic zones, structure and biological cover of this map. | Type of Source Media: computer program IKONOS Satellite Imagery Space Imaging Inc. 2003-01-01 Range 2001 2003 http://www.spaceimaging.com Used to identify and digitize benthic habitats for American Samoa. | Source Geospatial Form: remote-sensing image | Type of Source Media: CD-ROM 1 Benthic habitat maps were digitized by delineating habitat boundaries from georeferenced orthorectified IKONOS satellite imagery loaded into ArcView 3.3 GIS software with the Image Analysis and NOAA Coral Reef Habitat Digitizing extensions both activated. Digitizing was conducted using heads-up on computer screen methods with the minimum mapping unit (MMU) set to 1 acre and the image scale at 1:6,000.All IKONOS imagery was processed by NOS prior to map production. The imagery was corrected for atmospheric and water column effects, pan sharpened and deglinted. During the digitizing process, images were stretched and contrast, brightness and color balance were modified using the Arc View Image Analysis Extension to enhance features in the processed imagery.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 future ground validation effort. An ArcView GIS 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 using Trimble Pathfinder Software 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 snorkeling, 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. 2004-01-01T00:00:00 41228 Entity gov.noaa.nmfs.inport:39245 Tyler Christensen 2017-04-05T12:51:26 SysAdmin InPortAdmin 2025-05-15T19:16:13 2018-02-08 National Centers for Coastal Ocean Science NCCOS 1002 Public No No 2018-02-08 1 Year 2019-02-08