Nearshore Habitats, Narragansett & Mt. Hope Bay (linears)

Citation:

Citation Information:

Originator: State of Rhode Island, Dept of Environmental Management Narragansett Bay Estuary Program
Publication Date: 1999
Publication Time: Unknown
Title: Nearshore Habitats, Narragansett & Mt. Hope Bay (linears)

Description:

Abstract:
ArcInfo polygon coverage describing areal features:
Submerged aquatic vegetation (sav) primarily eelgrass, coastal wetlands, shoreline, and selected coastal features of Narragansett and Mt Hope Bay, delineated from true color aerial photography at 1 to 12,000 and 1 to 40,000 scale (taken 7/6/96 & 8/11/96) aclassified and coded according to U.S. Fish and Wildlife Service's "Classification of Wetlands and Deepwater Habitats of the United States. (Cowardin, 1979; reprinted 1992).

Changes in the size, density, dominance, or composition of the coastal vegetation may have occurred since date of photography.

Photo-interpretation of submerged aquatic vegetation was limited by water clarity, light penetration, and water depth.

Linear features represent habitat areas approximately 15 to 40 feet in width. These features were too small to map as polygons at the target minimum polygonal mapping units .5 acre for eelgrass beds; .25 acre for isolated (discrete) coastal wetlands and features, and 3 to 5 acres for internal polygons

The shoreline is a representation of the inland edge of coastal features as photo-interpreted from the 1:40,000 scale aerial photography.

All maps created with this data are for planning purposes only.

Aerial photography by J.W Sewell Company. Interpreted by the UMASS Natural Resources Assessment Group.

Purpose: Planning study for critical habitat protection; inventory of eelgrass beds.
Supplemental Information: Funding for this project was provided by: U.S. EPA, RIDEM Aqua Fund and Narragansett Bay Estuary Programs, and Save The Bay, Inc. The City of Warwick, RI was involved as cooperative partner.

Time Period of Content:

Time Period Information:

Single Date/Time:

Calendar Date: 8/6/1997

Currentness Reference: publication date

Status:

Progress: In Work
Maintenance and Update Frequency: Unknown

Spatial Domain:

Bounding Coordinates:

West Bounding Coordinate: -71.46051
East Bounding Coordinate: -71.06399
North Bounding Coordinate: 41.86556
South Bounding Coordinate: 41.44955

Keywords:

Theme:

Theme Keyword Thesaurus: None
Theme Keyword: eelgrass
Theme Keyword: Zostera marina
Theme Keyword: wetlands
Theme Keyword: habitats
Theme Keyword: marine
Theme Keyword: estuarine
Theme Keyword: saltwater wetlands
Theme Keyword: critical habitats

Place:

Place Keyword Thesaurus: None
Place Keyword: US
Place Keyword: New England
Place Keyword: Rhode Island
Place Keyword: Narragansett Bay

Access Constraints: none
Use Constraints: This data is intended for planning purposes only. Users must credit Narragansett Bay Estuary Program in any reports or maps derived from the dataset.
Point of Contact:

Contact Information:

Contact Person Primary:

Contact Person: Helen Cottrell
Contact Organization: RI Dept of Environmental Management, Narragansett Bay Estuary Program

Contact Position: Principal Environmental Scientist
Contact Address:

Address Type: mailing and physical address
Address: 235 Promenade Street
City: Providence
State or Province: RI
Postal Code: 02908
Country: USA

Contact Voice Telephone: (401) 222-3961 extension7273
Contact Electronic Mail Address: hcottrel@dem.state.ri.us
Hours of Service: 8:30 am to 4:00 PM
Contact Instructions: e-mail preferred

Data Set Credit: Irene Huber, Todd Nuerminger, David Foulis, Lynn Carlson, Helen Cottrell, Chris Deacutis, Nicole Cromwell, Andy Lipsky, Paul Jordan
Native Data Set Environment: ArcInfo 8.0.2 coverage format. Windows NT 4.0 sp6

Attribute Accuracy:

Attribute Accuracy Report: arcs color coded on proof plots then visually compared with source material by UMASS and DEM GIS Program staff

Logical Consistency Report: arc-node topology
Completeness Report: interpretation of submerged vegetation featues was limited by water depth, clarity and light penetration
Positional Accuracy:

Horizontal Positional Accuracy:

Horizontal Positional Accuracy Report: +/- 40 feet

Cloud Cover: 0

Direct Spatial Reference Method: Vector
Point and Vector Object Information:

SDTS Terms Description:

SDTS Point and Vector Object Type: G-polygon
Point and Vector Object Count: 2621

SDTS Terms Description:

SDTS Point and Vector Object Type: String
Point and Vector Object Count: 647

Horizontal Coordinate System Definition:

Planar:

Grid Coordinate System:

Grid Coordinate System Name: State Plane Coordinate System 1983
State Plane Coordinate System:

SPCS Zone Identifier: 3800
Transverse Mercator:

Scale Factor at Central Meridian: 0.9999375
Longitude of Central Meridian: -71.5
Latitude of Projection Origin: 41.0833333333
False Easting: 100000
False Northing: 0

Planar Coordinate Information:

Planar Coordinate Encoding Method: Coordinate Pair
Coordinate Representation:

Abscissa Resolution: 1
Ordinate Resolution: 1

Planar Distance Units: svy_ft

Geodetic Model:

Horizontal Datum Name: North American Datum of 1983
Ellipsoid Name: Geodetic Reference System 80
Semi-major Axis: 6378206
Denominator of Flattening Ratio: 294.9786982

Detailed Description:

Entity Type:

Entity Type Label: eel-lines.aat
Entity Type Definition: arc attribute table
Entity Type Definition Source: RIDEM GIS Program

Overview Description:

Entity and Attribute Overview:
Items in the Arc Attribute Table
CODE
An alpha numeric classification that corresponds to the type of wetland/eelgrass bed.
U.S. Fish and Wildlife Service's Classification of Wetlands and Deepwater Habitats of the United States (Cowardin,et. al., 1979)
Example: E2EM1Pd6 is Estuarine Intertidal Emergent Persistent Ditched Brackish
The first character is the System:
E=Estuarine, M=Marine
The second number is the Sub System:
1=Subtidal, 2=Intertidal
The third and fourth characters comprise the Class:
AB = Aquatic Bed
UB = Unconsolidated Bottom
EM = Emergent
RF = Reef
RS = Rocky Shore
SS = Scrub-shrub
US = Unconsolidated Shore
SB = Streambed
The fifth number is the Sub-Class:
AB1 = Aquatic Bed, Algal
AB3 = Aquatic Bed, Rooted Vascular
AB4 = Aquatic Bed, Floating Vascular
UB = Has no subclasses
EM1 = Emergent, Persistent
EM5 = Emergent, Phragmites australis
RF2 = Reef, Mollusc
RS1 = Rocky Shore, Bedrock
RS2 = Rocky Shore, Rubble
SS1 = Scrub Shrub, Broad Leaved Deciduous
US1 = Unconsolidated Shore, Cobble-Gravel
US2 = Unconsolidated Shore, Sand
US3 = Unconsolidated Shore, Mud
The 6th character is the Water Regime:
L = Subtidal
N = Tidal, Regularly Flooded
P = Tidal, Irregularly Flooded
M = Tidal, Irregularly Exposed
If the CODE is E1AB3L or M1AB3L, then the 7th character is a Special Modifier for percent cover:
e = % Cover cannot be determined; eelgrass signature is present, but there is no density
d = 70% to 100% cover
c = 40% to 69% cover
b = 10% to 39% cover
a = < 10% cover
If the CODE is NOT E1AB3L or M1AB3L, then the 7th character is a Special Modifier for human impact:
d = ditched
h = diked / impounded
r = artificial substrate
x = excavated
The 8th character is the Water Chemistry:
6 = Brackish

grp_2
Consolidation of CODE values into 20 groups for cartographic production
UPL = Uplands
DUNE = Dunes
EAB = Estuarine Aquatic Beds (Eelgrass)
EOW = Estuarine Open Water
ESM = Estuarine Salt Marsh
EBM = Estuarine Brackish Marsh
EPM = Estuarine Phragmites Marsh
EPBM = Estuarine Phragmites Brackish Marsh
OR = Oyster Reefs
RS = Rocky Shores
ESSW = Estuarine Scrub Shrub Wetland
EB = Estuarine Beaches and Tidal Flats
ETFPP = Estuarine Pannes, Pools and Irregulary Exposed Flats
MAB = Marine Aquatic Bed, Eelgrass
MOW = Marine Open Water
MRS = Marine Rocky Shore
MB = Marine Beaches
SB = Streambeds

grp_2_desc
Descriptive text for grp_2 as shown above

grp_3
Further consolidation of grp_2 values for cartographic production
removes the distinction between estuarine and marine features

Length
length in feet of discrete arcs
software calculated

Entity and Attribute Detail Citation: Paul Jordan, State of RI, Dept of Environmental Management GIS Program

Metadata Date: 7/3/2000
Metadata Review Date: 7/4/2000
Metadata Future Review Date: 7/4/2001
Metadata Contact:

Contact Information:

Contact Organization Primary:

Contact Organization: State of Rhode Island, Department of Environmental Management
Contact Person: Paul Jordan

Contact Position: GIS Manager
Contact Address:

Address Type: mailing and physical address
Address:
RIDEM / GIS Program 235 Promenade Street

City: Providence
State or Province: RI
Postal Code: 02980
Country: USA

Contact Voice Telephone: 401-222-2776 x4315
Contact Facsimile Telephone: 401-222-2069
Contact Electronic Mail Address: pjordan@dem.state.ri.us
Hours of Service: 8:30am to 4:30pm (Eastern)
Contact Instructions: e-mail is prefered method of contact

Metadata Standard Name: FGDC Content Standards for Digital Geospatial Metadata
Metadata Standard Version: 2
Metadata Time Convention: local time