47941
2002 Long Island South Shore Estuary Benthic Habitat Polygon Data Set
ny_liss02_p-meta
Data Set
Published / External
37225
Benthic
Project
Completed
2003-12-31
In June 2002, 200 1:20,000 scale conventional-color metric film diapositives for Long Island, New York were collected as part of an effort to map submerged aquatic vegetation (SAV) in Long Islands South Shore bays. They were provided by New York State Department of State's Division of Coastal Resources. Photographs were taken at low tide and during times that the growth stage of the SAV allowed for clear identification. Care was taken to minimize the effects of turbidity, sun glint, wind, and haze on the photos. The photos were scanned at a resolution of 15 microns. Ground control points were collected primarily from NYSDS 2 ft orthophotos. Additional control points were collected from USGS DOQQs where coverage from the primary source was lacking. All elevations were derived from USGS digital elevation models. A bundle block adjustment was performed using Albany and exterior orientation parameters were calculated. Boeing/Autometric's Softplotter was used to orthorectify the photos. The images were then dodged and mosaicked using Z/I's Orthopro. No additional color-balancing was performed as the mosaic's intended purpose was the delineation of benthic habitats. The mosaic was then output into 1000m by 1000m tiles with a 0.5m pixel resolution. The naming convention uses the first 3 numbers of the UTM x coordinate followed by the first 4 numbers in the UTM y coordinate of the southwest corner. Stereo digital images were created and the habitat features were interpreted and digitized on screen using softplotter microstation resulting in accurate and efficient 3D extraction of the data. Habitats were delineated with a high level of detail with the minimum mapping unit (MMU) being 0.01 hectares(approx.10m x 10m).The digitized polygons have the following specifications: Vertex Distance less than 1.0 m Node Snap Distance less than 4.0 m Arc Snap Distance less than 4.0 m During August 2002, NOAA staff collected 95 field observations throughout the study area and this information was incorporated into the map. In June 2003, after reviewing the photography, questionable areas were visited by Greenhorne and O'Mara staff and the findings were subsequently applied to the map. The map layers show delineated polygons and lines representing benthic habitat data. Each polygon feature is given a 1,2,3 or 4 digit number representing 11 habitats. The item numbers are stored in the attribute table under Text. The benthic data is classified according to the System for Classification of Habitats in Estuarine and Marine Environments (SCHEME). This system is fully described in "Development of a System for Classification of Habitats in Estuarine and Marine Environments (SCHEME) for Florida, Report to U.S. EPA - Gulf of Mexico Program, Florida Fish and Wildlife Conservation Commission, Florida Marine Research Institute. Review Draft 12/04/02."The collected data was converted to an ARCGIS format for quality control and delivery. The data was assessed for horizontal spatial accuracy and thematic agreement during 2003.
Original contact information:
Contact Name: Richard Eastlake
Contact Org: Greenhorne and O'Mara,Inc.
Title: Technical Director
Phone: 727 576 0402
Email: reastlake@g-and-o.com
At the urging of Long Island citizens, the New York State Legislature passed the Long Island South Shore Estuary Reserve Act in 1993. The Act recognized the South Shore Estuary as an unparalleled resource and provided for development of a Comprehensive Management Plan (CMP) to improve and protect the health of the estuary's ecosystem while increasing public access opportunities and sustaining economic activities. The Act also created a South Shore Estuary Reserve Council to prepare the plan and promote its implementation. The Council represents local governments, commercial and recreational fishing businesses, business associations, conservation and scientific organizations, education institutions and three State agencies including the New York State Department of State?s Division of Coastal Resources.One of the critical needs identified by the CMP is a baseline inventory of Submerged Aquatic Vegetation (SAV) resources, one of the Reserve?s most important living marine resources. Following the establishment of a comprehensive baseline SAV data set, the CMP calls for a long term monitoring program The monitoring will be designed to evaluate the level of success in attainment of specific site goals and the cumulative achievement of projected improvements in estuarine resources from habitat restoration and protection activities. The ultimate goal is to support productivity of commercially and ecologically important estuarine species by sustaining existing habitats of high functional quality and restoring degraded habitats. This data set will serve as the baseline inventory of benthic habitats for the Reserve.
10097
The study area covers approximately 443 km2 from the west end of Long Beach Island in Nassau County to Heady Creek at the east end of Shinnecock Bay in Suffolk County.
Theme
Global Change Master Directory (GCMD) Science Keywords
EARTH SCIENCE > BIOSPHERE > ECOSYSTEMS > MARINE ECOSYSTEMS > BENTHIC
Theme
Global Change Master Directory (GCMD) Science Keywords
EARTH SCIENCE > BIOSPHERE > ECOSYSTEMS > MARINE ECOSYSTEMS > COASTAL
Theme
Global Change Master Directory (GCMD) Science Keywords
EARTH SCIENCE > BIOSPHERE > ECOSYSTEMS > MARINE ECOSYSTEMS > ESTUARY
Theme
ISO 19115 Topic Category
biota
Theme
ISO 19115 Topic Category
environment
Spatial
Global Change Master Directory (GCMD) Location Keywords
CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA > NEW YORK
Theme
Environmental Monitoring
Theme
GIS
Theme
OCM Benthic Habitat Mapping
Theme
SAV
Theme
benthic data
Theme
benthic mapping
Theme
geographic information system
Theme
submerged aquatic vegetation
Spatial
Long Island South Shore Estuary Reserve
Spatial
New York
Spatial
United States
Office for Coastal Management
Charleston
SC
Data Set
None Planned
Map (digital)
While every effort has been made to ensure that these data are accurate and reliable within limits of the state of the art, NOAA will not assume any liability for damages caused by any inaccuracies in these data, or failure in their use.
49351
final_poly
final_poly
Published / External
Completed
final_poly attribute table | Description Source: NOAA
Converted from FGDC using 'fgdc_to_inport_xml_entity.pl' script.
1
FID
Unknown
No
No
Active
Internal feature number. | Description Source: ESRI
Sequential unique whole numbers that are automatically generated.
2
Shape
Unknown
No
No
Active
Feature geometry. | Description Source: ESRI
Coordinates defining the features.
3
AREA
Unknown
No
No
Active
Internal feature number. | Description Source: ESRI
Unknown
4
PERIMETER
Unknown
No
No
Active
Internal feature number. | Description Source: ESRI
Unknown
5
FINAL_POLY
Unknown
No
No
Active
Internal feature number. | Description Source: ESRI
Unknown
6
FINAL_ID
Unknown
No
No
Active
Internal feature number. | Description Source: ESRI
Unknown
7
SCHEME
VARCHAR
No
No
Active
Acronym for 'System for Classification of Habitats in Estuarine and Marine Environments' | Description Source: NOAA
SCHEME: System for Classification of Habitats in Estuarine and Marine Environments |
8
CLASS
VARCHAR
No
No
Active
Describes the general dominant lifeform | Description Source: NOAA
1: Unconsolidated Sediments | 4: Tidal Marsh | 6: Land | 2: Submersed Aquatic Vegetation | 7: Unknown Benthic Habitat | 3: Reef/Hardbottom |
9
SUBCLASS1
VARCHAR
No
No
Active
Define habitats with finer resolution descriptions at the two digit level | Description Source: NOAA
21: Submersed rooted vascular plants | 22: Macroalgae | 11: Mud | 32: Mollusk Reef |
10
SUBCLASS2
VARCHAR
No
No
Active
Define habitats with finer resolution descriptions at the three digit level | Description Source: NOAA
211: Continuous SRV | 212: Discontinuous SRV | 221: Attached Macroalgae | 321: Bivalve Reefs | 118: Detrital floor |
11
SUBCLASS3
VARCHAR
No
No
Active
Define habitats with finer resolution descriptions at the four digit level | Description Source: NOAA
2111: Dense patches of SRV in a matrix of continuous, sparse SRV | 2211: Continuous Attached Macroalgae | 2212: Discontinuous Attached Macroalgae |
12
MODIFIER
VARCHAR
No
No
Active
Modifiers allow detailed information to be included at all levels. | Description Source: NOAA
K: Drift wrack | N: Attached Macroalgae |
Data Steward
2003-12-31
Organization
NOAA Office for Coastal Management
NOAA/OCM
coastal.info@noaa.gov
2234 South Hobson Ave
Charleston
SC
29405-2413
(843) 740-1202
https://coast.noaa.gov
NOAA Office for Coastal Management Home Page
Online Resource
Distributor
2003-12-31
Organization
NOAA Office for Coastal Management
NOAA/OCM
coastal.info@noaa.gov
2234 South Hobson Ave
Charleston
SC
29405-2413
(843) 740-1202
https://coast.noaa.gov
NOAA Office for Coastal Management Home Page
Online Resource
Metadata Contact
2003-12-31
Organization
NOAA Office for Coastal Management
NOAA/OCM
coastal.info@noaa.gov
2234 South Hobson Ave
Charleston
SC
29405-2413
(843) 740-1202
https://coast.noaa.gov
NOAA Office for Coastal Management Home Page
Online Resource
Point of Contact
2003-12-31
Organization
NOAA Office for Coastal Management
NOAA/OCM
coastal.info@noaa.gov
2234 South Hobson Ave
Charleston
SC
29405-2413
(843) 740-1202
https://coast.noaa.gov
NOAA Office for Coastal Management Home Page
Online Resource
Ground Condition
-73.751901
-72.411823
40.906952
40.563308
Discrete
2002
Yes
Yes
7454
Unclassified
None
None
Data is available upon request
Data should not be changed or modified by anyone other than NOAA
ftp://ftp.coast.noaa.gov/pub/benthic/Benthic_Cover_Data/NY_LongIslandSouthShore.zip
Bulk Download
FTP download of data files.
https://coast.noaa.gov/
NOAA's Office for Coastal Management (OCM) website
Online Resource
Information on the NOAA Office for Coastal Management (OCM)
2017-03-30
Date that the source FGDC record was last modified.
2017-11-14
Converted from FGDC Content Standard for Digital Geospatial Metadata (version FGDC-STD-001-1998) using 'fgdc_to_inport_xml.pl' script. Contact Tyler Christensen (NOS) for details.
2018-02-08
Partial upload of Positional Accuracy fields only.
2018-04-11
Partial upload to move data access FTP links to Distribution Info and remove broken URLs.
Microsoft Windows 2000 Version 5.0 (Build 2195) Service Pack 2; ESRI ArcCatalog 8.2.0.700
A quality control inspection of the polygon labels was manually and digitally performed. A quality control AML verified that there are no unattributed polygons, label errors, node errors or invalid codes found in the coverage.Thematic accuracy assessment methods: The thematic accuracy of the benthic habitat data set was assessed via sampling of 99 field points generated through a random selection process. This was accomplished by randomly selecting ten percent of the polygons in each class of interest at the two digit SCHEME classification level ? Unconsolidated bottom, Submerged Rooted Vascular (SRV or SAV), and Algae. The random point generation was accomplished using the MILA extension in ESRI ArcView 3.X. The point generation process used the entire polygon as the sample unit. The actual geographic coordinate is derived from the polygon centroid. These points are then used as the target to navigate to in the field. Due to depth limitations, the actual centroid coordinate is often not accessible. In these cases, a representative area is surveyed as far into the polygon, from the deep edge into the shallows toward shore, as is possible. Navigation to each field point is accomplished using a digital NOAA nautical chart, real time Wide Area Augmentation System (WAAS) differentiated GPS (Garmin 76 unit) and a ruggedized field lap top PC. The PC displays the chart of the area with each ?target? point as well as a real time symbol display of the boat location via the GPS. This system allows navigation precisely to the ?target? point.The field observation of habitat type at each point was conducted in one of two ways. In shallow or extremely clear water direct observations were made from the boat. In deeper areas or areas of unclear water a towed underwater video camera was deployed. The camera provides a live video feed to a monitor. The camera is towed long enough (~2-4 minutes) at each station to provide a complete assessment of the dominate habitat type. The ?field? classes were recorded to at least the two digit SCHEME classification level and where possible to the three digit level.The ?field? classification for each point is compared to the ?lab? classification of each point in an error matrix. The resulting accuracy at the 2 digit SCHEME classification code level is 87%. At the 3 digit SCHEME classification code level the accuracy is 80%.
The accuracy of this digital data is based on the compilation from the georeferenced scanned images. The digital boundary in respect to the scanned images exceeds the 1:24000 scale National Map Accuracy Standards. The horizontal accuracy was assessed according to the FGDC National Standard for Spatial Data Accuracy (NSDDA) methodology. This approach compares the Root Mean Square Error (RMSE) value for a set of paired points, one point from the test imagery and one point from a source of higher spatial accuracy, to verify the imagery has met the contract specifications. For this project, 20 spatial accuracy points were collected using a Trimble GeoExplorer 3 GPS at terrestrial features spaced throughout the study area. According to the NSDDS methodology, the polygonal boundaries are +/- 5.5 meters.
The accuracy of this digital data is based on the compilation from the georeferenced scanned images. The digital boundary in respect to the scanned images meet the 1:24000 scale National Map Accuracy Standards.
All polygons and lines have been digitized and labeled from the orthorectified geotiff images provided by Greenhorne and O'Mara,inc. Coded features were cross-referenced with the SCHEME (Florida System for Classification of habitats in Estuarine and Marine Environments). A quality control inspection has been performed to eliminate any missing or duplicate polygon labels in the coverage. All inconsistent data was corrected. Six images in flightline 2 (21, 23, 25, 27, 29, and 31) were not included in the AT solution because these frames consisted entirely of water. These images were warped using an affine transformation to be included in the mosaic. For 2 of the images (25 and 27) there were not enough photo-identifiable locations to accurately perform the affine transformation. The transformation was still attempted to prevent a hole in the mosaic. The accuracy for these images is unknown. The affected mosaic tiles are: 6584505, 6584506, 6594504-6594507, 6604505-6604507, 6614505-6614508, 6624506-6624508, 6634506-6634508, 6644506-6644508.
The tests of logical consistency were performed using ESRI's ARC/INFO ARCGIS software. The dataset was built for internal arcs and polygons. The coverage has not been edited since the last build or clean.
2 ft orthophotos
New York Department of State
Discrete
1994-04
Ground control points used for aerial triangulation solution. | Type of Source Media: CD-ROM
Aerial Photography
New York State Department of State Division of Coastal Resources
Discrete
2002-06-03
20000
http://cugir.mannlib.cornell.edu/
Photos that were orthorectified | Source Geospatial Form: remote-sensing image | Type of Source Media: stable base material
Digital Elevation Models
USGS
24000
http://cugir.mannlib.cornell.edu/
Elevation information used for orthorectification and ground control for the photographs. | Type of Source Media: online
Digital Ortho Quarter-Quads
USGS
Supplemental ground control points. | Type of Source Media: online
1
Aerial Photography provided by New York State Department of State's Division of Coastal Resources. The photos were scanned at a resolution of 15 microns. Ground control points were collected primarily from NYSDS 2 ft orthophotos. Additional control points were collected from USGS DOQQs where coverage from the primary source was lacking. All elevations were derived from USGS digital elevation models. A bundle block adjustment was performed using Albany and exterior orientation parameters were calculated. Boeing/Autometric's Softplotter was used to orthorectify the photos. The images were then dodged and mosaicked using Z/I's Orthopro. No additional color-balancing was performed as the mosaic's intended purpose was the delineation of benthic habitats. The mosaic was then output into 1000m by 1000m tiles with a 0.5m pixel resolution. The naming convention uses the first 3 numbers of the UTM x coordinate followed by the first 4 numbers in the UTM y coordinate of the southwest corner.
2003-12-31T00:00:00
49351
Entity
final_poly
gov.noaa.nmfs.inport:47941
Anne Ball
2017-11-14T12:57:46
SysAdmin InPortAdmin
2023-05-30T18:09:29
2018-04-11
Office for Coastal Management
OCM
1002
Public
No
2018-04-11
1 Year
2019-04-11