Benthic Habitats of the Main Hawaiian Islands Prepared by Visual Interpretation from Remote Sensing Imagery Collected by NOAA Year 2000: Oahu (Section 1)
National Centers for Coastal Ocean Science
Data Set
(DS)
| ID: 39413
| Published / External
Created: 2017-04-05
|
Last Modified: 2023-10-17
Project (PRJ) | ID: 37185
ID: 39413
Data Set (DS)
* Discovery• First Pass
» Metadata Rubric
Item Identification
* » Title | Benthic Habitats of the Main Hawaiian Islands Prepared by Visual Interpretation from Remote Sensing Imagery Collected by NOAA Year 2000: Oahu (Section 1) |
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Short Name | oahu_sec1_benthic |
* Status | Completed |
Creation Date | |
Revision Date | |
• Publication Date | 2002-05-24 |
* » Abstract |
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. |
* Purpose |
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. |
Notes |
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• Supplemental Information | |
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Keywords
Theme Keywords
Thesaurus | Keyword |
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ISO 19115 Topic Category | environment |
ISO 19115 Topic Category | oceans |
None | AURORA hyperspectral imagery |
None | color aerial photography |
None | coral reef |
None | coralline algae |
None | environmental monitoring |
None | habitat |
None | oceans |
None | reef |
None | submerged aquatic vegetation |
None | unconsolidated sediments |
None | zone |
Temporal Keywords
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* Spatial Keywords
Thesaurus | Keyword |
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None | Hawaii |
None | Oahu |
None | U.S. Exclusive Economic Zone |
None | United States |
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Physical Location
• » Organization | National Centers for Coastal Ocean Science |
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• » City | Silver Spring |
• » State/Province | MD |
• Country | |
• » Location Description |
Data Set Information
* Data Set Scope Code | Data Set |
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• Data Set Type | |
• Maintenance Frequency | None Planned |
Maintenance Note | |
» Data Presentation Form | map |
• Entity Attribute Overview | |
Entity Attribute Detail Citation | |
Entity Attribute Detail URL | |
Distribution Liability |
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. |
Data Set Credit |
Support Roles
* » Support Role | Data Steward |
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* » Date Effective From | 2002-05-24 |
Date Effective To | |
Position | NCCOS Scientific Data Coordinator |
Email Address | NCCOS.data@noaa.gov |
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Contact Instructions |
* » Support Role | Distributor |
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* » Date Effective From | 2002-05-24 |
Date Effective To | |
Position | NCCOS Scientific Data Coordinator |
Email Address | NCCOS.data@noaa.gov |
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* » Support Role | Metadata Contact |
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* » Date Effective From | 2002-05-24 |
Date Effective To | |
Position | NCCOS Scientific Data Coordinator |
Email Address | NCCOS.data@noaa.gov |
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* » Support Role | Point of Contact |
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* » Date Effective From | 2002-05-24 |
Date Effective To | |
Position | NCCOS Scientific Data Coordinator |
Email Address | NCCOS.data@noaa.gov |
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* » Support Role | Principal Investigator |
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* » Date Effective From | 2002-05-24 |
Date Effective To | |
Person | Battista, Tim |
Email Address | tim.battista@noaa.gov |
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Extents
Currentness Reference | Ground Condition |
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Extent Group 1
Extent Description |
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Extent Group 1 / Geographic Area 1
* » W° Bound | -157.953 |
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* » E° Bound | -157.6141 |
* » N° Bound | 21.6534 |
* » S° Bound | 21.2472 |
* » Description |
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Extent Group 1 / Time Frame 1
* » Time Frame Type | Range |
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* » Start | 2001 |
End | 2002 |
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Spatial Information
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Access Information
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Data License Statement | |
* » Security Class | Unclassified |
* Security Classification System | |
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» Data Access Procedure | |
• » Data Access Constraints |
None |
• Data Use Constraints |
Not for navigation |
Metadata Access Constraints | |
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Distribution Information
Start Date | |
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» Download URL | http://coastalscience.noaa.gov/datasets/ccma/biogeo/hawaii/shapes/oahu_section1.zip |
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Downloadable Data |
File Date/Time | |
File Type (Deprecated) | ArcView Shapefile |
Distribution Format | Shapefile |
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URLs
URL | http://coastalscience.noaa.gov/datasets/ccma/biogeo/hawaii/shapes/oahu_section1.zip |
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Name | |
URL Type | Online Resource |
File Resource Format | |
Description |
URL | http://ccma.nos.noaa.gov/products/biogeography/hawaii_cd/data/ |
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URL Type | Online Resource |
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Activity Log
Activity Time | 2013-10-23 |
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Activity Type | |
Responsible Party | |
Description |
Date that the source FGDC record was last modified. |
Activity Time | 2017-04-05 |
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Activity Type | |
Responsible Party | |
Description |
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. |
Activity Time | 2017-11-01 |
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Description |
Replaced entire Lineage section to populate new Source Contribution field. |
Activity Time | 2018-02-08 |
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Partial upload of Positional Accuracy fields only. |
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Technical Environment
Description |
Microsoft Windows 2000 Version 5.0 (Build 2195) Service Pack 3; ESRI ArcCatalog 8.2.0.700 |
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Data Quality
Representativeness | |
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Accuracy |
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. |
Analytical Accuracy | |
Horizontal Positional Accuracy |
RMS from digitized output was determined using the ESRI RMEer2 extension and shown to be less than 1m when conducted at 1:6000 scale. |
Vertical Positional Accuracy | |
Quantitation Limits | |
Bias | |
Comparability | |
Completeness Measure | |
Precision | |
Analytical Precision | |
Field Precision | |
Sensitivity | |
Detection Limit | |
Completeness Report |
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. |
Conceptual Consistency |
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. |
» Quality Control Procedures Employed |
Data Management
» Have Resources for Management of these Data Been Identified? | |
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» Approximate Percentage of Budget for these Data Devoted to Data Management | |
» Do these Data Comply with the Data Access Directive? | |
» Is Access to the Data Limited Based on an Approved Waiver? | |
» If Distributor (Data Hosting Service) is Needed, Please Indicate | |
» Approximate Delay Between Data Collection and Dissemination | |
» If Delay is Longer than Latency of Automated Processing, Indicate Under What Authority Data Access is Delayed |
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» Actual or Planned Long-Term Data Archive Location | |
» If World Data Center or Other, Specify | |
» If To Be Determined, Unable to Archive, or No Archiving Intended, Explain |
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» Approximate Delay Between Data Collection and Archiving | |
» How Will the Data Be Protected from Accidental or Malicious Modification or Deletion Prior to Receipt by the Archive? |
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Lineage
» Lineage Statement |
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Sources
Citation Title | AURORA Hyperspectral Imagery |
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Contact Role Type | |
Contact Type | |
Contact Name | Advanced Power Technologies Inc. |
Publish Date | 2000-01-01 |
Extent Type | Discrete |
Extent Start Date/Time | 2000 |
Extent End Date/Time | |
Scale Denominator | |
Citation URL | |
Citation URL Name | |
Citation URL Description | |
Source Contribution |
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 |
Citation Title | Classification Scheme for Benthic Habitats: Main Eight Hawaiian Islands |
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Contact Role Type | |
Contact Type | |
Contact Name | M.S. Coyne |
Publish Date | 2002-01-01 |
Extent Type | Discrete |
Extent Start Date/Time | 2002 |
Extent End Date/Time | |
Scale Denominator | |
Citation URL | http://www.geoeye.com |
Citation URL Name | |
Citation URL Description | |
Source Contribution |
This document identified the zone and habitat types attributed in the data set | Source Geospatial Form: document | Type of Source Media: Report |
Citation Title | Color Aerial Photography |
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Contact Role Type | |
Contact Type | |
Contact Name | National Oceanic and Atmospheric Administration (NOAA), National Ocean Service (NOS), National Geodetic Survey (NGS) |
Publish Date | 2000-01-01 |
Extent Type | Discrete |
Extent Start Date/Time | 2000 |
Extent End Date/Time | |
Scale Denominator | 24000 |
Citation URL | http://www8.nos.noaa.gov/biogeo_public/aerial/search.aspx |
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Citation URL Description | |
Source Contribution |
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 |
Citation Title | Coral Reef Digitizing Extension |
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Contact Role Type | |
Contact Type | |
Contact Name | Ken Buja |
Publish Date | 2002-01-01 |
Extent Type | Discrete |
Extent Start Date/Time | 2002 |
Extent End Date/Time | |
Scale Denominator | |
Citation URL | http://ccma.nos.noaa.gov/products/biogeography/digitizer/ |
Citation URL Name | |
Citation URL Description | |
Source Contribution |
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 |
Citation Title | IKONOS Satellite Imagery |
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Contact Role Type | |
Contact Type | |
Contact Name | Space Imaging Inc. |
Publish Date | 2000-01-01 |
Extent Type | Discrete |
Extent Start Date/Time | 2000 |
Extent End Date/Time | |
Scale Denominator | |
Citation URL | http://www.geoeye.com |
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Source Contribution |
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 |
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Process Steps
Process Step Number | 1 |
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» Description |
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. |
Process Date/Time | 2001-10-10 00:00:00 |
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Acquisition Information
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Related Items
Item Type | Relationship Type | Title |
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Catalog Details
Catalog Item ID | 39413 |
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Metadata Record Created By | Tyler Christensen |
Metadata Record Created | 2017-04-05 12:52+0000 |
Metadata Record Last Modified By | SysAdmin InPortAdmin |
» Metadata Record Last Modified | 2023-10-17 16:12+0000 |
Metadata Record Published | 2018-02-08 |
Owner Org | NCCOS |
Metadata Publication Status | Published Externally |
Do Not Publish? | N |
Metadata Workflow State | Published / External |
Metadata Last Review Date | 2018-02-08 |
Metadata Review Frequency | 1 Year |
Metadata Next Review Date | 2019-02-08 |
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