Slide Menu
Search Help Show/Hide Menu
Short Citation:
National Centers for Coastal Ocean Science, 2022: Guam and Commonwealth of the Northern Mariana Islands (CNMI) Benthic Habitat Maps Prepared by Visual Interpretation from IKONOS satellite imagery procured by NOAA, https://www.fisheries.noaa.gov/inport/item/39285.

Item Identification

Title: Guam and Commonwealth of the Northern Mariana Islands (CNMI) Benthic Habitat Maps Prepared by Visual Interpretation from IKONOS satellite imagery procured by NOAA
Short Name: cnmi_benthic_parent
Status: Completed
Publication Date: 2004
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; 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 Commonwealth 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 149.2 square kilometers of which 37 were unconsolidated sediment and 112 were coral reef and hard bottom.

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. Precise mapping of benthic habitats is essential for developing management strategies that balance the protection of these habitats with their use. Accurate maps of these areas enable resource managers to make informed decisions about the use and protection of the resources.

Notes:

589

Supplemental Information:

Information for this metadata was taken from the individual metadata records for the Pacific Territories Benthic Habitat Mapping Project which can be accessed at http://ccma.nos.noaa.gov/ecosystems/coralreef/us_pac_terr/. For more information refer to the metadata record for the data layer of interest

Keywords

Theme Keywords

Thesaurus Keyword
UNCONTROLLED
ISO 19115 Topic Category environment
ISO 19115 Topic Category oceans
None coral reef
None coralline algae
None cover
None environmental monitoring
None habitat
None reef
None structure
None submerged aquatic vegetation
None unconsolidated sediments
None zone

Spatial Keywords

Thesaurus Keyword
UNCONTROLLED
None Agrihan
None Aguijan
None Alamagan
None Anathan
None Asuncion
None CNMI
None Commonwealth of the Northern Mariana Islands
None Commonwealth of the Northern Mariana Islands and Guam
None Farallon de Medinilla
None Farallon de Pajaros
None Guam
None Guguan
None Mariana Archipelago
None Maug
None Pagan
None Rota
None Saipan
None Sarigan
None Tinian
None United States

Physical Location

Organization: National Centers for Coastal Ocean Science
City: Silver Spring
State/Province: MD

Data Set Information

Data Set Scope Code: Data Set
Maintenance Frequency: None Planned
Data Presentation Form: map
Entity Attribute Overview:

The ground validation and accuracy assessment data are delivered as shapefiles and contain information based on the Pacific Territories Benthic Habitat Classification Scheme. Please refer to the individual layer metadata records for more information.

Entity Attribute Detail Citation:

A complete description of the Pacific Territories Benthic Habitat Classification Scheme can be found at http://ccma.nos.noaa.gov/ecosystems/coralreef/us_pac_terr/html/methods.aspx

Distribution Liability:

These data were prepared by an agency of the United States Government. Neither the United States Government nor any agency thereof, nor any of their employees, make any warranty, expressed or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed in this report, or represents that its use would not infringe privately owned rights. Reference therein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise does not necessarily constitute or imply its endorsement, recommendation, or favoring by the United States Government or any agency thereof. Any views and opinions of authors expressed herein do not necessarily state or reflect those of the United States Government or any agency thereof. Although all data have been used by NOAA, no warranty, expressed or implied, is made by NOAA as to the accuracy of the data and/or related materials. The act of distribution shall not constitute any such warranty, and no responsibility is assumed by NOAA in the use of these data or related materials.

Support Roles

Data Steward

CC ID: 464401
Date Effective From: 2004
Date Effective To:
Contact (Position): NCCOS Scientific Data Coordinator
Email Address: NCCOS.data@noaa.gov

Distributor

CC ID: 464403
Date Effective From: 2004
Date Effective To:
Contact (Position): NCCOS Scientific Data Coordinator
Email Address: NCCOS.data@noaa.gov

Metadata Contact

CC ID: 464404
Date Effective From: 2004
Date Effective To:
Contact (Position): NCCOS Scientific Data Coordinator
Email Address: NCCOS.data@noaa.gov

Point of Contact

CC ID: 464402
Date Effective From: 2004
Date Effective To:
Contact (Position): NCCOS Scientific Data Coordinator
Email Address: NCCOS.data@noaa.gov

Principal Investigator

CC ID: 464405
Date Effective From: 2004
Date Effective To:
Contact (Person): Battista, Tim
Email Address: tim.battista@noaa.gov

Extents

Currentness Reference: Ground Condition

Extent Group 1

Extent Group 1 / Geographic Area 1

CC ID: 464408
W° Bound: 144.599648
E° Bound: 146.075495
N° Bound: 20.568301
S° Bound: 13.22229

Extent Group 1 / Time Frame 1

CC ID: 464407
Time Frame Type: Range
Start: 2002
End: 2004

Spatial Information

Spatial Representation

Representations Used

Vector: Yes

Access Information

Security Class: Unclassified
Data Access Procedure:

Contact NOAA for distribution options (see Distributor). All maps of the Northern Mariana Archipelago prepared during this tenure are incorporated into this metadata summary.;

Data Access Constraints:

None

Data Use Constraints:

Not for navigation

Distribution Information

Distribution 1

CC ID: 464409
Download URL: http://ccma.nos.noaa.gov/ecosystems/coralreef/us_pac_terr/data/habitats.aspx
Distributor:
Description:

Downloadable Data

File Type: shapefile

URLs

URL 1

CC ID: 464398
URL: http://ccma.nos.noaa.gov/ecosystems/coralreef/us_pac_terr/data/habitats.aspx
URL Type:
Online Resource

URL 2

CC ID: 464399
URL: http://ccma.nos.noaa.gov/ecosystems/coralreef/us_pac_terr/data/
URL Type:
Online Resource

Activity Log

Activity Log 1

CC ID: 464443
Activity Date/Time: 2014-07-02
Description:

Date that the source FGDC record was last modified.

Activity Log 2

CC ID: 464442
Activity Date/Time: 2017-04-05
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 Log 3

CC ID: 584349
Activity Date/Time: 2017-09-13
Description:

Partial upload of Spatial Info section only.

Activity Log 4

CC ID: 600970
Activity Date/Time: 2017-11-01
Description:

Replaced entire Lineage section to populate new Source Contribution field.

Activity Log 5

CC ID: 716629
Activity Date/Time: 2018-02-08
Description:

Partial upload of Positional Accuracy fields only.

Technical Environment

Description:

Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 1; ESRI ArcCatalog 9.0.0.535

Data Quality

Accuracy:

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 1113 GPS waypoints were occupied and benthic characterizations conducted for the purpose of accuracy assessment. Areas that were obscured by cloud cover or where other environmental conditions such as glint of turbidity prevented visual interpretation of the benthic habitats were assigned an attribute of "unknown". Field observations that fell in polygons designated "unknown" were not included in the statistical analysis. During this survey, 5 of the 1113 field observations were excluded for this reason and 1108 observations were used in the 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 98.7% and 92.6% for the major structure and cover classes and 87.8% and 81% for the detailed classes respectively for the entire Mariana Archipelago.

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.

Completeness Report:

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.

Conceptual Consistency:

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.

Lineage

Sources

Classification Scheme for Benthic Habitats of the Pacific

CC ID: 600971
Contact Name: M.S. Coyne
Publish Date: 2003-01-01
Extent Type: Discrete
Extent Start Date/Time: 2003
Citation URL: http://ccma.nos.noaa.gov/ecosystems/coralreef/us_pac_terr/html/methods.aspx
Source Contribution:

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

CC ID: 600972
Contact Name: Ken Buja
Publish Date: 2003-01-01
Extent Type: Discrete
Extent Start Date/Time: 2003
Citation URL: http://coastalscience.noaa.gov/projects/detail?key=203
Source Contribution:

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

CC ID: 600973
Contact Name: Space Imaging Inc.
Publish Date: 2003-01-01
Extent Type: Range
Extent Start Date/Time: 2001
Extent End Date/Time: 2003
Citation URL: http://www.spaceimaging.com
Source Contribution:

Used to identify and digitize benthic habitats for the Mariana Archipelago. | Source Geospatial Form: remote-sensing image | Type of Source Media: CD-ROM

Process Steps

Process Step 1

CC ID: 600974
Description:

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.

Process Date/Time: 2004-01-01 00:00:00

Child Items

Rubric scores updated every 15m

Rubric Score Type Title
Entity Mariana Archipelago Benthic Habitat Shapefile Attribute Table

Catalog Details

Catalog Item ID: 39285
GUID: gov.noaa.nmfs.inport:39285
Metadata Record Created By: Tyler Christensen
Metadata Record Created: 2017-04-05 12:51+0000
Metadata Record Last Modified By: SysAdmin InPortAdmin
Metadata Record Last Modified: 2022-08-09 17:11+0000
Metadata Record Published: 2018-02-08
Owner Org: NCCOS
Metadata Publication Status: Published Externally
Do Not Publish?: N
Metadata Last Review Date: 2018-02-08
Metadata Review Frequency: 1 Year
Metadata Next Review Date: 2019-02-08