Miles Anderson, Analytical Laboratories of Hawaii, 2004, Habitat Zone, Cover and Structure Maps of the Sarigan, Northern Mariana Archipelago 2001-2003, Derived From IKONOS Imagery: Analytical Laboratories of Hawaii, Kailua, Hawaii.This is part of the following larger work.Online Links:
Department of Commerce (DOC), National Oceanic and Atmospheric Administration (NOAA), National Ocean Service (NOS), National Centers for Coastal Ocean Science (NCCOS), Center for Coastal Monitoring and Assessment (CCMA), Biogeography Program, 2004, Benthic Habitats of the Mariana Archipelago Prepared by Visual Interpretation from IKONOS satellite imagery procured by NOAA: NOAA's Ocean Service, National Centers for Coastal Ocean Science (NCCOS), Silver Spring, MD.
This is a Vector data set. It contains the following vector data types (SDTS terminology):
Planar coordinates are encoded using Coordinate Pair
Abscissae (x-coordinates) are specified to the nearest 0.002048
Ordinates (y-coordinates) are specified to the nearest 0.002048
Planar coordinates are specified in meters
The horizontal datum used is North American Datum of 1983.
The ellipsoid used is Geodetic Reference System 80.
The semi-major axis of the ellipsoid used is 6378137.000000.
The flattening of the ellipsoid used is 1/298.257222.
ESRI
Coordinates defining the features.
| Formal codeset | |
|---|---|
| Codeset Name: | Habitat description |
| Codeset Source: | Habitat classification scheme for the Pacific |
| Formal codeset | |
|---|---|
| Codeset Name: | Habitat description |
| Codeset Source: | Habitat classification scheme for the Pacific |
Incremental numeric field
| Range of values | |
|---|---|
| Minimum: | 10.31 |
| Maximum: | 162605543.23 |
| Units: | NA |
| Range of values | |
|---|---|
| Minimum: | 13.84 |
| Maximum: | 165991.33 |
| Units: | NA |
| Range of values | |
|---|---|
| Minimum: | 0.003 |
| Maximum: | 40179.83 |
| Units: | NA |
Manually assigned character field
Assigned during digitizing character field
Assigned during digitizing character field
Assigned during digitizing
Assigned during digitizing character field
Assigned during digitizing character field
Character field
301-713-3028 (voice)
301-713-4388 (FAX)
steve.rohmann@noaa.gov
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.
Coyne, M.S., 2003, Classification Scheme for Benthic Habitats of the Pacific: NOAA's Ocean Service, National Centers for Coastal Ocean Science (NCCOS), Silver Spring, MD.Online Links:
Buja, Ken, 2003, Coral Reef Digitizing Extension: NOAA's Ocean Service (NOS), National Centers for Coastal Ocean Science (NCCOS), Silver Spring, MD.Online Links:
Inc., Space Imaging , 2003, IKONOS Satellite Imagery: Space Imaging Inc., Thornton, CO.
Person who carried out this activity:
(808) 262-2417 (voice)
(808) 262-7027 (FAX)
miles@interpac.net
Data sources used in this process:
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.
Are there legal restrictions on access or use of the data?
- Access_Constraints: None
- Use_Constraints: Not for navigation
301-713-3028 (voice)
301-713-4388 (FAX)
steve.rohmann@noaa.gov
Downloadable Data
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. NOAA makes no warranty regarding these data, expressed or implied, nor does the fact of distribution constitute such a warranty. NOAA can not assume liability for and damages caused by any errors or omissions in these data, nor as a result of the failure of these data to function on a particular system.
| Data format: | |
|---|---|
| Network links: |
<http://ccma.nos.noaa.gov/ecosystems/coralreef/us_pac_terr/html/maps/> |
Contact NOAA for distribution options (see Distributor). All maps of the Northern Mariana Archipelago prepared during this tenure are incorporated into this metadata summary.
301-713-3028 (voice)
301-713-4388 (FAX)
steve.rohmann@noaa.gov