39413 oahu_sec1_benthic Data Set Published / External 37185 Hawaii_2000 Project Completed 2002-05-24 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, and Analytical Laboratories of Hawaii, LLC. The goal of the work was to develop coral reef mapping methods and compare benthic habitat maps generated by photointerpreting georeferenced color aerial photography, hyperspectral and IKONOS satellite imagery. Twenty-seven distinct benthic habitat types within eleven zones were mapped directly into a GIS system using visual interpretation of orthorectified aerial photographs and hyperspectral imagery. Benthic features were mapped that covered an area of 790 km^2. In all, 204 km^2 of unconsolidated sediment, 171 km^2 of submerged vegetation, and 415 km^2 of coral reef and colonized hardbottom were mapped. The National Ocean Service is conducting research 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. 413 Theme ISO 19115 Topic Category environment Theme ISO 19115 Topic Category oceans Theme AURORA hyperspectral imagery Theme color aerial photography Theme coral reef Theme coralline algae Theme environmental monitoring Theme habitat Theme oceans Theme reef Theme submerged aquatic vegetation Theme unconsolidated sediments Theme zone Spatial Hawaii Spatial Oahu Spatial U.S. Exclusive Economic Zone Spatial United States National Centers for Coastal Ocean Science Silver Spring MD Data Set None Planned map 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. 41351 Oahu_section_1.dbf Published / External Completed Shapefile Attribute Table | Description Source: None Converted from FGDC using 'fgdc_to_inport_xml_entity.pl' script. 1 PolygonID NUMBER No No Active Unique ID for each GIS Polygon | Description Source: Incremental Value 1 - 954 2 Acres NUMBER No No Active Area of each polygon in acres | Description Source: GIS software calculation 1.005 - 29463.34 3 Id VARCHAR No No Active ID assigned to each detailed habitat type | Description Source: Benthic Habitats of the Main Hawaiian Islands 11: Unconsolidated Sediment/Sand | 12: Unconsolidated Sediment/Mud | 32: Coral Reef and Hardbottom/Colonized Hardbottom/Linear Reef | 33: Coral Reef and Hardbottom/Colonized Hardbottom/Spur and Groove | 34: Coral Reef and Hardbottom/Colonized Hardbottom/Individual Patch Reef | 35: Coral Reef and Hardbottom/Colonized Hardbottom/Aggregated Patch Reef | 37: Coral Reef and Hardbottom/Colonized Hardbottom/Aggregated Coral | 38: Coral Reef and Hardbottom/Colonized Hardbottom/Scattered Coral/ Rock in Unconsolidated Sediment | 39: Coral Reef and Hardbottom/Colonized Hardbottom/Colonized Pavement | 41: Coral Reef and Hardbottom/Colonized Hardbottom/Colonized Volcanic Rock/Boulder | 42: Coral Reef and Hardbottom/Colonized Hardbottom/Colonized Pavement with Sand Channels | 45: Coral Reef and Hardbottom/Encrusting Coralline Algae/50% to less than 90% | 46: Coral Reef and Hardbottom/Encrusting Coralline Algae/10% to less than 50% | 47: Coral Reef and Hardbottom/Encrusting Coralline Algae/90% to less than 100% | 61: Coral Reef and Hardbottom/Uncolonized Hardbottom/Uncolonized Pavement | 62: Coral Reef and Hardbottom/Uncolonized Hardbottom/Reef Rubble | 64: Coral Reef and Hardbottom/Uncolonized Hardbottom/Uncolonized Volcanic Rock/Boulder | 65: Coral Reef and Hardbottom/Uncolonized Hardbottom/Uncolonized Pavement with Sand Channels | 71: Other Delineations/Land | 79: Other Delineations/Unknown | 100: Other Delineations/Artificial/Other Man Made Features | 101: Other Delineations/Artificial/Hardened Substrate | 102: Other Delineations/Artificial/Fish Ponds | 103: Other Delineations/Artificial/Emergent Vegetation | 211: Submerged Vegetation/Seagrass/90%-100% | 2121: Submerged Vegetation/Seagrass/10% to less than 50% | 2124: Submerged Vegetation/Seagrass/50% to less than 90% | 2211: Submerged Vegetation/Macroalgae/90%-100% | 22121: Submerged Vegetation/Macroalgae/10% to less than 50% | 22122: Submerged Vegetation/Macroalgae/50% to less than 90% | 4 Descriptor Unknown No No Active Field containing concatenated habitat data | Description Source: Benthic Habitats of the Main Hawaiian Islands Concatenated field of detailed habitats from ArcView GIS software 5 Zone Unknown No No Active Name of benthic zone for each GIS polygon | Description Source: Benthic Habitats of the Main Hawaiian Islands Character Field 6 Habitat Unknown No No Active Name of benthic habitat for each GIS polygon | Description Source: Benthic Habitats of the Main Hawaiian Islands Character Field 7 Type Unknown No No Active Subset of habitat | Description Source: ArcView Habitat Digitizer Extension Character Field 8 Modifier1 Unknown No No Active Subset of type | Description Source: ArcView Habitat Digitizer Extension Character Field 9 Modifier2 Unknown No No Active Subset of Modifier1 | Description Source: ArcView Habitat Digitizer Extension Character Field 10 Modifier3 Unknown No No Active Subset of Modifier2 | Description Source: ArcView Habitat Digitizer Extension Character Field 11 Representa Unknown No No Active Characteristic Species found in each GIS polygon | Description Source: Benthic Habitats of the Main Hawaiian Islands Character Field Data Steward 2002-05-24 Position NCCOS Scientific Data Coordinator NCCOS.data@noaa.gov Distributor 2002-05-24 Position NCCOS Scientific Data Coordinator NCCOS.data@noaa.gov Metadata Contact 2002-05-24 Position NCCOS Scientific Data Coordinator NCCOS.data@noaa.gov Point of Contact 2002-05-24 Position NCCOS Scientific Data Coordinator NCCOS.data@noaa.gov Principal Investigator 2002-05-24 Person Battista, Tim tim.battista@noaa.gov Ground Condition -157.953 -157.6141 21.6534 21.2472 Range 2001 2002 Unclassified None Not for navigation https://coastalscience.noaa.gov/datasets/ccma/biogeo/hawaii/shapes/oahu_section1.zip Downloadable Data ArcView Shapefile Shapefile https://ccma.nos.noaa.gov/products/biogeography/hawaii_cd/data/ Online Resource https://coastalscience.noaa.gov/datasets/ccma/biogeo/hawaii/shapes/oahu_section1.zip Online Resource 2013-10-23 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. 2017-11-01 Replaced entire Lineage section to populate new Source Contribution field. 2018-02-08 Partial upload of Positional Accuracy fields only. Microsoft Windows 2000 Version 5.0 (Build 2195) Service Pack 3; ESRI ArcCatalog 8.2.0.700 The purpose of this study was to determine the relative accuracy of maps generated from the photointerpretation of three sources of remotely sensed imagery. Four test areas were identified based on the diversity of the habitat types and to ensure that all benthic habitat types throughout the Hawaiian Islands were represented. A random stratified sampling method was implemented to select field sites to test the map accuracy. Each site was navigated to using a Trimble Geo Explorer 3 GPS data logger, and positional data was acquired. The three types of imagery were acquired during different days with different weather conditions. The habitat type for the portions of the test area that were not interpretable due to cloud cover, glint or water quality were classified as unknown. The accuracy assessment points that fell within polygons with the habitat type of unknown were not included in the accuracy analysis. As a result, the total number of accuracy assessment points varies between the imagery types within a single area. Two statistical analyses (Kappa and Tau test and the Z score) were performed. The Kappa and Tau statistic for the major habitat types showed that the percent overall accuracy of photointerpretation of color aerial photography, IKONOS satellite and hyperspectral imagery is 90.7%, 86.5% and 89% respectively. The Z score showed that at the 90% confidence level there was no significant difference between data gathered from the three imagery sources. At the 95% confidence level there is a significant difference in the quality between aerial photographs and IKONOS satellite imagery. The accuracy assessments tests showed that the ability to generate benthic habitat maps with an overall accuracy of 90% at the 95% confidence interval is reaching a threshold using imagery with three meter pixel size allowing for spectral enhancement of the imagery with reduced resolution. RMS from digitized output was determined using the ESRI RMEer2 extension and shown to be less than 1m when conducted at 1:6000 scale. NOAA supplied georeferenced imagery to Analytical Laboratories of Hawaii. 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 photointerpreter 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 for visual photointerpretation. The software utilized in this project was designed to alert the photointerpreter each time a polygon was drawn smaller than the MMU. When this occurred the photointerpreter has the choice whether to include the polygon in the data set. All three types of remotely sensed imagery were processed by NOS prior to map production. Individual color aerial photographs were georeferenced and mosaicked. The hyperspectral data composed of 72 ten nm wide bands were subsetted to three band composites that enhanced deep and shallow water features. IKONOS satellite imagery was corrected for atmospheric and water column effects. 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. AURORA Hyperspectral Imagery Advanced Power Technologies Inc. 2000-01-01 Discrete 2000 Used to identify and digitize benthic habitats for the eight main Hawaiian Islands. | Source Geospatial Form: remote-sensing image | Type of Source Media: CD-ROM Classification Scheme for Benthic Habitats: Main Eight Hawaiian Islands M.S. Coyne 2002-01-01 Discrete 2002 http://www.geoeye.com This document identified the zone and habitat types attributed in the data set | Source Geospatial Form: document | Type of Source Media: Report Color Aerial Photography National Oceanic and Atmospheric Administration (NOAA), National Ocean Service (NOS), National Geodetic Survey (NGS) 2000-01-01 Discrete 2000 24000 https://www8.nos.noaa.gov/biogeo_public/aerial/search.aspx Used to identify and digitize benthic habitats for the eight main Hawaiian Islands. | Source Geospatial Form: remote-sensing image | Type of Source Media: CD-ROM Coral Reef Digitizing Extension Ken Buja 2002-01-01 Discrete 2002 https://ccma.nos.noaa.gov/products/biogeography/digitizer/ This ArcView extension was used to digitize and attribute benthic zones and habitats for the eight main Hawaiian Islands. | Type of Source Media: computer program IKONOS Satellite Imagery Space Imaging Inc. 2000-01-01 Discrete 2000 http://www.geoeye.com Used to identify and digitize benthic habitats for the eight main Hawaiian Islands. | Source Geospatial Form: remote-sensing image | Type of Source Media: CD-ROM 1 Benthic habitat maps were digitized by delineating habitat boundaries from georeferenced imagery loaded into ArcView 3.2 GIS software with the Image Analysis and NOAA Coral Reef Habitat Digitizing extensions both activated. Digitizing was conducted using heads-up computer screen methods with the minimum mapping unit (MMU) set to 1 acre and the image scale at 1:6,000. All three types of remotely sensed imagery were processed by NOS prior to map production. Individual color aerial photographs were georeferenced and mosaicked. The hyperspectral data composed of 72 ten nm wide bands were subsetted to three band composites that enhanced deep and shallow water features. IKONOS satellite imagery was corrected for atmospheric and water column effects. During the digitizing process, image stretched and manipulating image contrast, brightness and color balance were performed in the ArcView 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 via observations from the surface where water depth and clarity permitted. GPS data were collected at each location and site ID, depth, habitat type, zone and the method used to make the assessment were recorded. The ground validation data were incorporated into the second draft of each map. 2001-10-10T00:00:00 41351 Entity gov.noaa.nmfs.inport:39413 Tyler Christensen 2017-04-05T12:52:24 SysAdmin InPortAdmin 2025-05-15T19:16:14 2018-02-08 National Centers for Coastal Ocean Science NCCOS 1002 Public No No 2018-02-08 1 Year 2019-02-08