Short Citation:
Office for Coastal Management, 2021: 2002 Long Island South Shore Estuary Benthic Habitat Line Data Set, https://www.fisheries.noaa.gov/inport/item/47937.

Item Identification

Title: 2002 Long Island South Shore Estuary Benthic Habitat Line Data Set
Short Name: ny_liss02_l-meta
Status: Completed
Publication Date: 2003-12-30
Abstract:

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 Island's 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 linework 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 In some cases differences in color and texture between adjacent features tend to be more subtle and boundaries more difficult to detect. In these areas the boundary was delineated using the best possible line between points where the edge can be reliably determined. This line was attributed as confidence level "LOW" in the line coverage. The "low confidence" lines were found mainly in the deep water areas of the data set although they were found occasionally in areas of high turbidity. In cases where a clear determination of a habitat boundary was made with confidence, that line was given the attribute "HIGH". The items are stored in the attribute table under 'Confidence'. This data was delivered as '2002 Long Island South Shore Estuary Benthic Habitat Line Data Set '. 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. This is a companion dataset to the polygon coverage '2002 Long Island South Shore Estuary Benthic Habitat Polygon Data Set '.

Purpose:

This data set was created to enable more intelligent change detection in the future. In some cases differences in color and texture between adjacent features tend to be more subtle and boundaries more difficult to detect. In these areas the boundary was delineated using the best possible line between points where the edge can be reliably determined. This line was attributed as confidence level "LOW" in the line coverage. The "low confidence" lines were found mainly in the deep water areas of the data set although they were found occasionally in areas of high turbidity. In cases where a clear determination of a habitat boundary was made with confidence, that line was given the attribute "HIGH".

Notes:

10093

Supplemental Information:

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.

Keywords

Theme Keywords

Thesaurus Keyword
Global Change Master Directory (GCMD) Science Keywords Earth Science > Biosphere > Ecosystems > Marine Ecosystems > Benthic
Global Change Master Directory (GCMD) Science Keywords Earth Science > Biosphere > Ecosystems > Marine Ecosystems > Coastal
Global Change Master Directory (GCMD) Science Keywords Earth Science > Biosphere > Ecosystems > Marine Ecosystems > Estuary
ISO 19115 Topic Category boundaries
ISO 19115 Topic Category environment
ISO 19115 Topic Category environment
None Environmental Monitoring
None NOAA

Spatial Keywords

Thesaurus Keyword
Global Change Master Directory (GCMD) Location Keywords Continent > North America > United States Of America > New York
None Long Island
None New York
None United States

Physical Location

Organization: Office for Coastal Management
City: Charleston
State/Province: SC

Data Set Information

Data Set Scope Code: Data Set
Maintenance Frequency: None Planned
Data Presentation Form: Map (digital)
Distribution Liability:

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.

Support Roles

Data Steward

CC ID: 613516
Date Effective From: 2003-12-30
Date Effective To:
Contact (Organization): NOAA Office for Coastal Management (NOAA/OCM)
Address: 2234 South Hobson Ave
Charleston, SC 29405-2413
Email Address: coastal.info@noaa.gov
Phone: (843) 740-1202
URL: https://coast.noaa.gov

Distributor

CC ID: 613518
Date Effective From: 2003-12-30
Date Effective To:
Contact (Organization): NOAA Office for Coastal Management (NOAA/OCM)
Address: 2234 South Hobson Ave
Charleston, SC 29405-2413
Email Address: coastal.info@noaa.gov
Phone: (843) 740-1202
URL: https://coast.noaa.gov

Metadata Contact

CC ID: 613519
Date Effective From: 2003-12-30
Date Effective To:
Contact (Organization): NOAA Office for Coastal Management (NOAA/OCM)
Address: 2234 South Hobson Ave
Charleston, SC 29405-2413
Email Address: coastal.info@noaa.gov
Phone: (843) 740-1202
URL: https://coast.noaa.gov

Point of Contact

CC ID: 613517
Date Effective From: 2003-12-30
Date Effective To:
Contact (Organization): NOAA Office for Coastal Management (NOAA/OCM)
Address: 2234 South Hobson Ave
Charleston, SC 29405-2413
Email Address: coastal.info@noaa.gov
Phone: (843) 740-1202
URL: https://coast.noaa.gov

Extents

Currentness Reference: Ground Condition

Extent Group 1

Extent Group 1 / Geographic Area 1

CC ID: 613522
W° Bound: -73.751901
E° Bound: -72.411823
N° Bound: 40.906952
S° Bound: 40.563308

Extent Group 1 / Time Frame 1

CC ID: 613521
Time Frame Type: Discrete
Start: 2002

Spatial Information

Spatial Representation

Representations Used

Vector: Yes

Vector Representation 1

CC ID: 613511
Curve Object Present?: Yes
Curve Object Count: 17221

Access Information

Security Class: Unclassified
Security Classification System:

None

Security Handling Description:

None

Data Access Constraints:

Data is available upon request

Data Use Constraints:

Data should not be changed or modified by anyone other than NOAA

Distribution Information

Distribution 1

CC ID: 750626
Download URL: ftp://ftp.coast.noaa.gov/pub/benthic/Benthic_Cover_Data/NY_LongIslandSouthShore.zip
Distributor:
File Name: Bulk Download
Description:

FTP download of data files.

URLs

URL 1

CC ID: 750628
URL: https://coast.noaa.gov/
Name: NOAA's Office for Coastal Management (OCM) website
URL Type:
Online Resource
Description:

Information on the NOAA Office for Coastal Management (OCM)

Activity Log

Activity Log 1

CC ID: 613536
Activity Date/Time: 2017-03-30
Description:

Date that the source FGDC record was last modified.

Activity Log 2

CC ID: 613535
Activity Date/Time: 2017-11-14
Description:

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.

Activity Log 3

CC ID: 717947
Activity Date/Time: 2018-02-08
Description:

Partial upload of Positional Accuracy fields only.

Activity Log 4

CC ID: 750627
Activity Date/Time: 2018-04-11
Description:

Partial upload to move data access FTP links to Distribution Info and remove broken URLs.

Technical Environment

Description:

Microsoft Windows 2000 Version 5.0 (Build 2195) Service Pack 2; ESRI ArcCatalog 8.2.0.700

Data Quality

Horizontal Positional Accuracy:

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. 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.

Vertical Positional Accuracy:

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.

Completeness Report:

not available

Conceptual Consistency:

not available

Lineage

Sources

2 ft orthophotos

CC ID: 613507
Contact Name: New York Department of State
Extent Type: Discrete
Extent Start Date/Time: 1994-04
Source Contribution:

Ground control points used for aerial triangulation solution. | Type of Source Media: CD-ROM

Aerial Photography

CC ID: 613505
Contact Name: New York State Department of State Division of Coastal Resources
Extent Type: Discrete
Extent Start Date/Time: 2002-06-03
Scale Denominator: 20000
Source Contribution:

Photos that were orthorectified | Source Geospatial Form: remote-sensing image | Type of Source Media: stable base material

Digital Elevation Models

CC ID: 613506
Contact Name: USGS
Scale Denominator: 24000
Citation URL: http://cugir.mannlib.cornell.edu/
Source Contribution:

Elevation information used for orthorectification and ground control for the photographs. | Type of Source Media: online

Digital Ortho Quarter-Quads

CC ID: 613508
Contact Name: USGS
Source Contribution:

Supplemental ground control points. | Type of Source Media: online

Process Steps

Process Step 1

CC ID: 613509
Description:

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.

Process Date/Time: 2003-12-30 00:00:00

Child Items

Rubric scores updated every 15m

Rubric Score Type Title
Entity (ENT) 2002 Long Island South Shore Estuary Benthic Habitat Line Data Set

Catalog Details

Catalog Item ID: 47937
Metadata Record Created By: Anne Ball
Metadata Record Created: 2017-11-14 12:57+0000
Metadata Record Last Modified By: SysAdmin InPortAdmin
Metadata Record Last Modified: 2019-07-02 15:17+0000
Metadata Record Published: 2018-04-11
Owner Org: OCM
Metadata Publication Status: Published Externally
Do Not Publish?: N
Metadata Next Review Date: 2019-04-12