39285
Guam and Commonwealth of the Northern Mariana Islands (CNMI) Benthic Habitat Maps Prepared by Visual Interpretation from IKONOS satellite imagery procured by NOAA
cnmi_benthic_parent
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 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.
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.
589
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
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
Agrihan
Spatial
Aguijan
Spatial
Alamagan
Spatial
Anathan
Spatial
Asuncion
Spatial
CNMI
Spatial
Commonwealth of the Northern Mariana Islands
Spatial
Commonwealth of the Northern Mariana Islands and Guam
Spatial
Farallon de Medinilla
Spatial
Farallon de Pajaros
Spatial
Guam
Spatial
Guguan
Spatial
Mariana Archipelago
Spatial
Maug
Spatial
Pagan
Spatial
Rota
Spatial
Saipan
Spatial
Sarigan
Spatial
Tinian
Spatial
United States
National Centers for Coastal Ocean Science
Silver Spring
MD
Data Set
None Planned
map
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.
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
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.
41264
Mariana Archipelago Benthic Habitat Shapefile Attribute Table
Mariana Archipelago Benthic Habitat Shapefile Attribute Table
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
Unknown
No
No
Active
Area of polygon | Description Source: ArcView script
Unique Value
7
PERIMETER
Unknown
No
No
Active
Perimeter of polygon | Description Source: ArcView script
Unique Value
8
ACRES
Unknown
No
No
Active
Area of polygon in acres | Description Source: ArcView script
Unique Value
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
144.599648
146.075495
20.568301
13.22229
Range
2002
2004
Yes
Unclassified
Contact NOAA for distribution options (see Distributor). All maps of the Northern Mariana Archipelago prepared during this tenure are incorporated into this metadata summary.;
None
Not for navigation
http://ccma.nos.noaa.gov/ecosystems/coralreef/us_pac_terr/data/habitats.aspx
Downloadable Data
shapefile
Shapefile
http://ccma.nos.noaa.gov/ecosystems/coralreef/us_pac_terr/data/
Online Resource
http://ccma.nos.noaa.gov/ecosystems/coralreef/us_pac_terr/data/habitats.aspx
Online Resource
2014-07-02
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 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.
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 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
http://ccma.nos.noaa.gov/ecosystems/coralreef/us_pac_terr/html/methods.aspx
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
http://coastalscience.noaa.gov/projects/detail?key=203
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 the Mariana Archipelago. | 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
41264
Entity
Mariana Archipelago Benthic Habitat Shapefile Attribute Table
gov.noaa.nmfs.inport:39285
Tyler Christensen
2017-04-05T12:51:41
SysAdmin InPortAdmin
2023-10-17T16:12:11
2018-02-08
National Centers for Coastal Ocean Science
NCCOS
1002
Public
No
2018-02-08
1 Year
2019-02-08