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Submerged Aquatic Vegetation, Hudson River estuary, 1997

Identification Information
Citation
Originator
Cornell Institute for Resource Information Sciences (Cornell IRIS)
Publication Date
20021022
Title
Submerged Aquatic Vegetation, Hudson River estuary, 1997
Geospatial Data Presentation Form
vector digital data
Publication Information
Publication Place
Annandale, New York
Publisher
Hudson River National Estuarine Research Reserve (NERR) and New York State Department of Environmental Conservation (NYSDEC)
Online Linkage
https://cugir.library.cornell.edu/catalog/cugir-007872
Abstract
Submerged aquatic vegetation (SAV) is an important habitat and site of primary production in many aquatic ecosystems but there was no baseline information on SAV extent or distribution in the tidal freshwater Hudson River. In 1994, a collaboration was initiated between the Institute of Ecosystem Studies (IES), the Hudson River National Estuarine Research Reserve/NYSDEC, the Cornell Laboratory for Environmental Applications of Remote Sensing (CLEARS), now the Cornell Institute for Resource Information Systems (IRIS) http://www.css.cornell.edu/iris/. In addtion, the New York Sea Grant, the Hudson River Estuary Program, and the National Oceanic and Atmospheric Administration (NOAA) are identified as partners. These groups provided diverse expertise to enable the first broad delimitation of SAV in the Hudson.
Purpose
The project was undertaken in two separate time periods with different sources of funding. In 1995, Phase I (Hyde Park to Castleton) was initiated with National Oceanic and Atmospheric Association and Hudson River Foundation funds. Subsequently in 1997, the remaining portions (Hastings to Hyde Park and Castleton to Troy) were undertaken in Phase II with New York. State Environmental Protection Funds through the Hudson River Estuary Program.
Supplemental Information
High quality, true color aerial photographs were acquired for Phase I on August 9, 1995 and Phase II on July 20, August 7 and August 18 in 1997 by AeroGraphics, Inc. of Bohemia, New York. Photographs were acquired with 60% forward lap and 30% side lap, at the nominal scale of 1:14,400 under ideal conditions within one hour of low tide and clear atmospheric conditions. Flight and mapping criteria followed the 1994 NOAA C-CAP protocols for SAV mapping. Stereoscopic aerial photographic coverage was available for the entire study area. The effective area of alternate aerial photographs was established and delineated on 3 mil matte acetate photo overlays. Major tributaries were not mapped with the exception of Schodack Creek. Shoreline Coverage-- The four-category classification system was developed through consultations among IES, HRNERR and IRIS. The four categories (numerical codes) are Open Water (VEGCODE=0), Upland/Intertidal (VEGCODE=1); Vallisneria americana (VEGCODE=2), and Trapa natans (VEGCODE=3). Of primary interest is Vallisneria americana, the predominant species of SAV. It is important to note that our Upland/Intertidal category includes intertidal marshes and mudflats which were largely exposed at time of photography. OW - Open Water VEGCODE=0" - Water areas including the Hudson River, tributary rivers, bays, coves with no indicators of submerged rooted vegetation, upland vegetation or dry land. UP/INT - Upland/Intertidal VEGCODE=1 - Dry land with or without upland vegetation or intertidal marsh vegetation. VA - Vallisneria americana (water or wild celery, tape grass) VEGCODE=2 - Beds of Vallisneria americana as well as beds of mixed vegetation including Vallisneria americana. TN - Trapa natans (water chestnut, water nut) VEGCODE=3 - Beds of Trapa natans, rooted with floating leaves. Linear Coverage-- During ground-truthing of polygon beds north of Albany, observations were made of frequent occurrences of very narrow linear beds of Vallisneria located adjacent to the shoreline. These features generally appeared to be in the two-to-three meter width size, and because they did not provide a signature were not visible on the color aerial photographs. In some instances, the plants were over-shadowed by tree cover along the shoreline. These features were subsequently mapped from the ground. Mapping of linear features, grab samples and GPS quality control functions resulted from a collaboration between Cornell IRIS and the Institute of Ecosystems Studies (IES). IES performed digitization; data merging and conversion performed by IRIS. Data have been converted from NAD27 to NAD83.
Temporal Extent
Currentness Reference
Coverages are updated as amendments occur, or as errors in the data are discovered and corrected.
Time Period
Beginning
1995
End
1997
Bounding Box
West
-74.043644
East
-73.684859
North
42.755276
South
40.872863
Theme Keyword
Marine plants
Seagrasses
Estuarine plants
Aquatic plants
Marine plants
American wild celery
Water chestnut
Aquatic weeds
Theme Keyword Thesaurus
LCSH
Theme Keyword
Vallisneria americana
Trapa natans
Submerged aquatic vegetation
Theme Keyword Thesaurus
none
ISO Topic Category
biota
environment
inlandWaters
oceans
Theme Keyword
biology
environment
inland waters
oceans
Theme Keyword Thesaurus
CUGIR Category
Place Keyword
Hudson River (N.Y. and N.J.)
Hudson River Estuary (N.Y. and N.J.)
Place Keyword Thesaurus
LCSH
Temporal Keyword
Access Restrictions
None
Use Restrictions
None
Status
Complete
Maintenance and Update Frequency
Not Applicable
Point of Contact
Contact Person
Chuck Nieder
Delivery Point
Hudson River NERR c/o Bard College Field Station
City
Annandale
State
New York
Postal Code
12504
Contact Telephone
845-758-7013
Contact Facsimile Telephone
845-758-7033
Contact Electronic Mail Address
mailto:wcnieder@gw.dec.state.ny.us
Credit
Hudson River National Estuarine Research Reserve (NERR) maintains the Hudson SAV data
Native Data Set Environment
Microsoft Windows NT Version 4.0 (Build 1381) Service Pack 6; ESRI ArcCatalog 8.1.1.649
Data Quality Information
Attribute Accuracy Report
Delineation of the four land cover categories (Open Water-Vegcode=0; Upland/Intertidal-Vegcode=1; Vallisneria americana-Vegcode=2; Trapa natans-vegcode=3) was accomplished by the use of color pencil lines and labels drawn on the photo overlay as the stereo model was viewed using an Abrams 2X and 4X stereoscope or an Old Delft Scanning stereoscope at 6X.
Logical Consistency Report
The inventory included broad delimitation of submerged aquatic vegetation (SAV) beds and T. natans in the Hudson River using aerial photography for primary data collection. Field sampling of random points was used to verify the photo interpretation, generally following established protocols. In the case of SAV linear features, because their signatures were not detectable on the aerial photographs, were mapped in the field using a global positioning system. To verify presence of plants, randomly selected grab samples were taken at 141 field locations.
Completeness Report
The image analyst used her experience with key indicator signatures for object recognition and interpretation with true color aerial photographs in the SAV inventory. Vallisneria americana (water celery), for example, varies in color from light green-brown to dark green-brown to dark green-blue. The bed texture is smooth, velvety to fine bumpy; depends on plant density, species composition, and bed location at or below the water surface. The leaves of Trapa natans (water chestnut) are light green to yellow-green to creamy white. It appears to have smooth bed texture due to uniform leaf size and shape.
Horizontal Positional Accuracy Report
Coverages are accurate to the quality of the original topographic map
Lineage
Source
Originator
Cornell Institute for Resource Information Systems (Cornell IRIS)
Publication Date
1994
Title
Hudson River Submerged Aquatic Vegetation Mapping
Geospatial Data Presentation Form
map
Source Scale Denominator
14400
Type of Source Media
photographic reproductions of topographic quadrangle maps
Source Temporal Extent
Time Period Information
Range of Dates/Times
Beginning Date
1995
Ending Date
1997
Source Currentness Reference
Publication Date
Contribution
Spatial and attribute information
Spatial Data Organization Information
Direct Spatial Reference Method
Vector
Point and Vector Object Information
SDTS Terms Description
SDTS Point and Vector Object Type
Complete chain
Point and Vector Object Count
1877
SDTS Terms Description
SDTS Point and Vector Object Type
Label point
Point and Vector Object Count
1217
SDTS Terms Description
SDTS Point and Vector Object Type
Complete chain
Point and Vector Object Count
28
SDTS Terms Description
SDTS Point and Vector Object Type
Entity Point
Point and Vector Object Count
82
SDTS Terms Description
SDTS Point and Vector Object Type
Point
Point and Vector Object Count
4
SDTS Terms Description
SDTS Point and Vector Object Type
Point
Point and Vector Object Count
176
Spatial Reference Information
Horizontal Coordinate System Definition
Planar
Grid Coordinate System
Grid Coordinate System Name
Universal Transverse Mercator
Universal Transverse Mercator
UTM Zone Number
18
Transverse Mercator
Scale Factor at Central Meridian
0.999600
Longitude of Central Meridian
-75.000000
Latitude of Projection Origin
0.000000
False Easting
500000.000000
False Northing
0.000000
Planar Coordinate Information
Planar Coordinate Encoding Method
coordinate pair
Coordinate Representation
Abscissa Resolution
0.000512
Ordinate Resolution
0.000512
Planar Distance Units
meters
Geodetic Model
Horizontal Datum Name
North American Datum of 1983
Ellipsoid Name
Geodetic Reference System 80
Semi-major Axis
6378137.000000
Denominator of Flattening Ratio
290.257222
Entity and Attribute Information
Entity Type
Entity Type Label
fin_shore83.aat
Entity Type Definition
Unspecified
Entity Type Definition Source
Unspecified
Attributes
FID
Internal feature number. (Sequential unique whole numbers that are automatically generated.)
Definition Source
ESRI
Shape
Feature geometry. (Coordinates defining the features.)
Definition Source
ESRI
FNODE#
Internal node number for the beginning of an arc (from-node). (Whole numbers that are automatically generated.)
Definition Source
ESRI
TNODE#
Internal node number for the end of an arc (to-node). (Whole numbers that are automatically generated.)
Definition Source
ESRI
LPOLY#
Internal node number for the left polygon. (Whole numbers that are automatically generated.)
Definition Source
ESRI
RPOLY#
Internal node number for the right polygon. (Whole numbers that are automatically generated.)
Definition Source
ESRI
LENGTH
Length of feature in internal units. (Positive real numbers that are automatically generated.)
Definition Source
ESRI
FINAL_SHORE83#
Internal feature number. (Sequential unique whole numbers that are automatically generated.)
Definition Source
ESRI
FINAL_SHORE83-ID
User-defined feature number. (Whole numbers that are automatically generated.)
Definition Source
ESRI
Entity Type
Entity Type Label
fin_savs83.pat
Entity Type Definition
Unspecified
Entity Type Definition Source
Unspecified
Attributes
FID
Internal feature number. (Sequential unique whole numbers that are automatically generated.)
Definition Source
ESRI
Shape
Feature geometry. (Coordinates defining the features.)
Definition Source
ESRI
Area
Area of feature in internal unites squared. (Positive real numbers that are automatically generated.)
Definition Source
ESRI
Perimeter
Perimeter of feature in internal units. (Positive real numbers that are automatically generated.)
Definition Source
ESRI
FIN_SAVS83#
Internal feature number. (Sequential unique whole numbers that are automatically generated.)
Definition Source
ESRI
FIN_SAV83-ID
User defined feature number. (Unspecified.)
Definition Source
ESRI
Type
Unspecified. (Unspecified.)
Definition Source
ESRI
Vegcode
Unspecified. (Sequential unique whole numbers that are automatically generated.)
Definition Source
Unspecified
Distribution Information
Format Name
E00
Format Name
metadata
Format Name
HTML metadata
Distributor
Albert R. Mann Library
Online Access
https://cugir-data.s3.amazonaws.com/00/78/72/cugir-007872.zip
Online Access
https://cugir-data.s3.amazonaws.com/00/78/72/fgdc.xml
Online Access
https://cugir-data.s3.amazonaws.com/00/78/72/fgdc.html
Name
Metadata Reference Information
Metadata Date
20210913
Metadata Contact
Contact Information
Contact Organization Primary
Contact Organization
Albert R. Mann Library
Contact Address
Address
Albert R. Mann Library
City
Ithaca
State or Province
New York
Postal Code
14853
Country
USA
Contact Voice Telephone
607-255-5406
Contact Electronic Mail Address
mann-ref@cornell.edu
Metadata Standard Name
FGDC Content Standard for Digital Geospatial Metadata
Metadata Standard Version
FGDC-STD-001-1998
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