metadata_gvdata_shallowwater_sites_transects eng; USA utf8 dataset 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 Branch Primary Map Creator 301-713-3028 301-713-4384 1305 East West Highway Silver Spring MD 20910 0800 - 1700, Monday to Friday, EST pointOfContact 2024-12-15 ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data ISO 19115-2:2009(E) Entity Point 5966 North American Datum 1983 NAD83 2007-01-19 revision https://epsg.org/crs_4269/NAD83.html NAD83 Link to Geographic Markup Language (GML) description of reference system. information resourceProvider European Petroleum Survey Group https://epsg.org/home.html European Petroleum Survey Group Geodetic Parameter Registry Registry that accesses the EPSG Geodetic Parameter Dataset, which is a structured dataset of Coordinate Reference Systems and Coordinate Transformations. search publisher urn:ogc:def:crs:EPSG::4269 St. John Shallow-water Ground Validation Transects 2009 publication Adam Zitello, NOAA/NOS/NCCOS/CCMA Biogeography Branch originator NOAA's Ocean Service, National Centers for Coastal Ocean Science (NCCOS) Silver Spring MD publisher mapDigital Please use citation for the written document "Benthic Habitats of St. John, U.S. Virgin Islands" when using these data. Benthic habitat maps of the nearshore marine environment of St. John, U.S. Virgin Islands were created by visual interpretation of remotely sensed imagery. The objective of this effort, conducted by NOAA's Center for Coastal Monitoring and Assessment - Biogeography Branch in partnership with the U.S. National Park Service (NPS), was to provide spatially-explicit information on the habitat types, biological cover and live coral cover of St. John's coral reef ecosystem. The data described herein represent evaluation transects of ground validation (GV) sites explored by NOAA field scientists to further refine habitat map classification. Considering vessel drift during habitat characterization, the entire evaluation period was most accurately represented by a series of GPS points logged at five-second intervals. The purpose of this survey data was to investigate areas of imagery where uncertainties existed on the photo interpreter's behalf during the decision making process of benthic habitat classification in St. John. This information was incorporated into a fine-scale assessment of the status, abundance, and distribution of marine habitats of St. John. The NOAA effort provides the U.S. National Park Service with increased technical capacity for ocean exploration, management, and stewardship. Direct implications to management measures include evaluation of management efficacy, a spatial framework for improved monitoring sampling design, improved assessment of human-use impacts, and marine spatial planning to support alternative marine protected area boundary alternatives. completed Tim Battista NOAA National Ocean Service Researcher (301) 713-3028 x171 (301) 713-4388 1305 East West Highway Silver Spring MD 20910 USA Tim.Battista@noaa.gov pointOfContact notPlanned CoRIS_Metadata theme NCEI Geoportal Filter EARTH SCIENCE > Biosphere > Aquatic Habitat > Benthic Habitat theme CoRIS Theme Thesaurus Geographic Information > Habitats theme CoRIS Discovery Thesaurus coral reef benthic habitats reef submerged aquatic vegetation unconsolidated sediments zone geomorphological structure biological cover ground validation transect theme None United States U. S. Virgin Islands St. John place None COUNTRY/TERRITORY > United States of America > U. S. Virgin Islands > St. John > St. John (18N064W0011) OCEAN BASIN > Atlantic Ocean > Caribbean Sea > Virgin Islands > Virgin Islands > St. John (18N064W0011) place CoRIS Place Thesaurus USVI place CoRIS Region The National Oceanic and Atmospheric Administration (NOAA) National Centers for Coastal Ocean Science (NCCOS) is publishing this data on their website. NCCOS Biogeography Branch does not guarantee the accuracy of the geographic features or attributes. Please see the written report and metadata records for each data set for complete information on the source, limitations, and proper use. otherRestrictions Use Constraints: Not for navigation. otherRestrictions Access Constraints: None Benthic Habitats of St. John, U.S. Virgin Islands 2009-01-01 publication NOAA National Centers for Coastal Ocean Science Silver Spring MD publisher 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 originator documentDigital Zitello, A.G., L.J. Bauer, T.A. Battista, P.W. Mueller and M.S. Kendall. 2009. Benthic Habitats of St. John, U.S. Virgin Islands. NOAA Technical Memorandum NOS NCCOS 96. 50 pp. largerWorkCitation vector eng; USA imageryBaseMapsEarthCover environment Native Dataset Environment: Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 3; ESRI ArcCatalog 9.3.0.1770 -64.839111 -64.643499 18.296091 18.373729 2009-01-05 2009-01-16 The creation of high-quality benthic habitat maps required extensive field work to enhance accuracies of habitat attribution and, to a lesser degree, habitat delineation. Data were collected on 444 ground validation sites over a two-week field mission from January 5-16, 2009 aboard U.S. National Park Service small research vessels. As anchoring at each site was not feasible for rapid assessment, wind and wave effects caused the survey vessel to drift along a transect. Post-processing of the GPS data allowed for a series of points to represent the actual survey location. St. John Ground Validation Transects: Shapefile attribute table GPS_Date Date position was logged GPS_Time Time position was logged FID Internal feature number. Sequential unique whole numbers that are automatically generated. Shape Feature geometry. Coordinates defining the features. Max_PDOP Maximum Positional Dilution of Precision unitless value Max_HDOP Maximum Horizontal Dilution of Precision unitless value Vert_Prec Vertical Precision in meters Horz_Prec Horizontal Precision in meters 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 301-713-3028 x171 301-713-4384 1305 East West Highway Silver Spring MD 20910 tim.battista@noaa.gov 0800 - 1700, Monday to Friday, EST distributor dataset Horizontal Positional Accuracy Report The true positional accuracy of individual epics was determined to be within 1 m for 96% of the logged points. However, it is estimated that horizontal accuracies may be 0 - 20m from the true position of the underwater camera assessment due to line "lay-back" during drift. 444 field positions were occupied and habitat characterizations were conducted for ground validation during this work. A small subset of the ground validation sites did not have transect information in this dataset, depending on the evaluation technique. Snorkel and visual inspection from distances did not allow for a GPS receiver to occupy the exact location, as a result, approximated GPS locations were used instead without the opportunity for transects with the underwater camera. Data points were collected with mapping-grade GPS receivers. The data were post processed for differential correction to the Continually Operating Reference System (CORS) station at St. Thomas, U.S. Virgin Islands (VITH). All attribute information was recorded by the GPS receiver and stored directly in the raw GPS files. This automated process was assumed to be error free. This file is believed to be logically consistent. A first draft benthic habitat map was generated by delineating all features that could be identified by visual inspection of the remotely sensed imagery. During the creation of this first draft, the interpreter placed discrete points on the map that were difficult to distinguish and that warranted further field investigation. These sites were labeled as "ground validation" (GV) positions. Process_Date: 2008-2009 2009-01-01T00:00:00 NOAA field scientists explored the ground validation locations with a suite of assessment techniques depending on the conditions at each site. A combination of underwater video (primary method), free diving, snorkeling and surface observations were used to survey the ecological characteristics at each location. At the start of every morning, the boat captain selected a general region to begin the day's work. Navigating to field locations was accomplished using a Garmin GPS 76 device with the uploaded GV site coordinates. The boat captain maneuvered the vessel to within 5 m of the target location and made every effort to maintain that location without jeopardizing crew and equipment safety. Once on site, NOAA scientists would simultaneously deploy a SeaViewer Sea-Drop 950 camera and begin logging a waypoint on a Trimble GeoXT GPS receiver.While the video camera was capturing bottom imagery, an observer viewed the video real-time on a Panasonic Toughbook aboard the survey vessel. They categorized each site according to the levels of the habitat classification scheme: major and detailed geomorphological structure, major biological cover, percent major biological cover and percent coral cover. Data was entered into a custom data dictionary generated in Trimble Pathfinder Office software and loaded onto the Trimble data logger. 2009-01-01T00:00:00 Trimble Pathfinder Office software was used to post process and differentially correct the raw GPS data to the Continually Operating Reference System (CORS) station at St. Thomas, U.S. Virgin Islands (VITH). 2009-01-01T00:00:00 Precisely positioned GPS positions and its associated transects were viewed in a GIS to enhance the accuracy of the draft benthic habitat map. Polygon boundaries and habitat classifications were revised where field data necessitated changes. 2009-01-01T00:00:00 Source Contribution: GPS data, which were originally recorded as code-phase signals in Trimble SSF format, were differentially post-processed to the Continually Operating Reference System (CORS) station at St. Thomas, U.S. Virgin Islands (VITH). Source Type: GPS data GPS Data 2009-01-01 publication NOAA originator 2009-01-01 annually This metadata was automatically generated from the FGDC Content Standards for Digital Geospatial Metadata standard (version FGDC-STD-001-1998) using the 2016-01-11 version of the FGDC RSE to ISO 19115-2 transform. Translated from FGDC 2025-03-24T17:18:58.206Z Last Metadata Review Date: 2010-02-26 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 Branch Primary Map Creator 301-713-3028 301-713-4384 1305 East West Highway Silver Spring MD 20910 0800 - 1700, Monday to Friday, EST pointOfContact