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Hydrography, Tompkins County NY, 2001

Identification Information
Citation
Originator
Tompkins County Planimetric Project
Publication Date
2001
Title
Hydrography, Tompkins County NY, 2001
Geospatial Data Presentation Form
vector digital data
Publication Information
Publication Place
Tompkins County
Publisher
Tompkins County IT/GIS Program
Online Linkage
https://cugir.library.cornell.edu/catalog/cugir-007497
Abstract
The Tompkins County Planning Department utilized inter-departmental mapping expertise of the Tompkins County Information Technology Services GIS Division to produce a data set of surface water features for Tompkins County, New York. The need for this data set has been identified by various county departments, local municipal agencies, and other not-for-profit organizations.
Purpose
To provide a complete network of streams within the county boundaries and to add enough basic attributes that a fundamental degree of categorization would be achieved. To provide a stream layer for map production and to provide a framework for relating streams to external databases.
Supplemental Information
Data originating from the Tompkins County 1991-92 Planimetric project at a scale of 1:4800 was organized into watersheds and edited to complete the connectivity of stream segments and networks. Identified gaps between arcs due to the original data capture errors were corrected with the use of secondary data sources. In locations where stream paths did not exist through water bodies and wetlands, additional segments, or artificial paths were added through these polygons. Approximate stream centerlines were also delineated in locations where larger streams were identified only by two arcs representing stream edges. In addition, all centerline segment directional orientation was altered to a downstream direction. Paper Maps can be ordered directly from Tompkins County IT/GIS. Attribute information can be found is the following attached files :Hydrology_attributes.xls and a HYDROLOGY_ATTRIBUTES.txt file
Temporal Extent
Currentness Reference
publication date
Time Instant
200105
Bounding Box
West
-76.769534
East
-76.237712
North
42.945211
South
42.26282
Theme Keyword
creeks
surface water
Theme Keyword Thesaurus
Theme Keyword
Hydrography
Rivers
Lakes
Ponds
Hydrology
Reservoirs
Theme Keyword Thesaurus
LCSH
Theme Keyword
inlandWaters
Theme Keyword Thesaurus
ISO 19115 Topic Categorties
Theme Keyword
inland waters
Theme Keyword Thesaurus
CUGIR Category
Place Keyword
Fall Creek (Cayuga County and Tompkins County, N.Y.)
Six Mile Creek (N.Y.)
Cascadilla Creek (N.Y.)
Tompkins County (N.Y.)
Finger Lakes Region (N.Y.)
Cayuga Lake (N.Y.)
Place Keyword Thesaurus
LCSH
Temporal Keyword
Access Restrictions
None
Use Restrictions
The following statement must be included with any products that use or are derived from this data set: Data contained in this product was originally produced by the Tompkins County ITS GIS Division and may not be reproduced or redistributed without the express written consent of the originator. The originator does not warrant the accuracy or completeness of the information portrayed by the data. Please use data at the scale in which it was intended to be used.
Status
Complete
Maintenance and Update Frequency
As needed
Point of Contact
Contact Organization
Tompkins County ITS GIS Division
Delivery Point
128 East Buffalo Street
City
Ithaca
State
New York
Postal Code
14850
Country
USA
Contact Telephone
(607) 274-5418
Contact Facsimile Telephone
(607) 274-5420
Contact Electronic Mail Address
gis@tompkins-co.org
Hours of Service
M-F 8:30 a.m. to 4:30 p.m.
Credit
Tompkins County ITS GIS Division
Native Data Set Environment
PATH: /DATA/ARCINFO/COUNTY/NYSP/PHYSICAL/HYDROGRAPHY SOFTWARE: WindowsNT 4.0 x86, Arc/Info Single Precision Coverage
Cross-Reference
Originator
Tompkins County ITS GIS Division
Title
Cayuga Lake
Publication Information
Publication Place
Tompkins County
Publisher
Tompkins County GIS Program
Online Linkage
http://www.tompkins-co.org/gis/
Data Quality Information
Attribute Accuracy Report
See "Source" and "Status" fields of Entity and Attribute Information
Completeness Report
For all stream segments that are part of the National Hydrography Dataset ("Comonid"), the New York State Department of Environmental Conservation's Water Index Number ("WIN") maps, regulation numbers (" Apt"), and the 303(d) list of Priority Water Bodies ("Priorityh2o") this data can be considered complete for Tompkins County. Because of the changing nature of stream flow and the gray area defining intermittent streams it would not be responsible to suggest that the data is complete for streams on the smaller end of the size continuum. We have been careful to include as many data sources as possible to incorperate them into the Hydrography dataset.
Horizontal Positional Accuracy Report
Varies, depending on source of Hydography data (Planimetric Base Map, DOQQ’s, aerial photo, raw conversion from paper maps, etc). The positional accuracy of each individual arc is determined by the source and status data for that arc found in the fields "Source" and "Status". More than 65% of the the data set tagged with the hyd and plan source attributes is limited to the accuracy of the 1991 Tompkins County Planimetric Base Map series. The centerlines and artificial paths (Ltype = scl and Ltype = ap) represents another 14% and the accuracy of these arcs is much less significant positionally since centerlines and artificial paths are only intended to represent an abstract paths of a streams passing through a lakes, reservoirs, ponds, wetlands. Arcs with a Source code other than "hyd" or an Ltype code of "ap" or "scl" are generally accurate to within plus or minus 30 feet.
Lineage
Source
Originator
Tompkins County Environmental Management Council, Tompkins County Planning Department, Cornell Plantations
Publication Date
1999
Title
Unique Natural Areas of Tompkins County, 1999 Inventory
Edition
2nd
Other Citation Details
This is an extensive revision of the "Unique Natural Areas of Tompkins County, 1990 Inventory". One hundred and ninety-two Unique Natural Areas are inventoried. Detailed information about each Unique Natural Area (site description, reason for selection, rating, protection status, water resources, physical characteristics, soils, conservation comments, cover type, vegetation/animal description, rare flora, and rare fauna) and an accurate site map of the UNA boundary is provided for each site.
Contribution
Source information included in the "Source" field of the Attribute table
Spatial Data Organization Information
Direct Spatial Reference Method
Vector
Point and Vector Object Information
SDTS Terms Description
SDTS Point and Vector Object Type
String
Point and Vector Object Count
21729
Spatial Reference Information
Horizontal Coordinate System Definition
Planar
Grid Coordinate System
Grid Coordinate System Name
State Plane Coordinate System 1983
State Plane Coordinate System
SPCS Zone Identifier
3102
Transverse Mercator
Planar Coordinate Information
Planar Coordinate Encoding Method
Coordinate Pair
Coordinate Representation
Abscissa Resolution
1
Ordinate Resolution
1
Planar Distance Units
survey feet
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
Entity and Attribute Information
Entity Type
Entity Type Label
Hydrography
Entity Type Definition
Hydrography arc segments
Attributes
Apt -- More attribute information can be found is the following attached files :Hydrology_attributes.xls and a HYDROLOGY_ATTRIBUTES.txt file
artificial path - an abstract line representing a stream passing through lakes, reservoirs, ponds, wetlands
Bridge
Bridges, culverts, and storm drains
br
motor vehicle bridge
cu
culvert - used anywhere that water is directed below the surface.
rrbr
railroad bridge
rrcu
railroad culvert
pedbr
pedestrian bridge
Definition Source
Tompkins County ITS GIS Division, 2000
Class
Stream perminancy determined form USGS 7.5 min. quadrangle map
I
intermittent - contains water for only part of the year but more than just after rainstorms or snowmelt
p
perennial - contains water throughout the year except during severe drought
Definition Source
U.S.G.S
Comments
Any relevant information that does not conveniently fit into any other existing attribute field.
Definition Source
Tompkins County ITS GIS Division, 2000
Commonid
A unique stream segment identification number from National Hydrological Dataset (NHD).
Dec-win
New York State Department of Environmental Conservation Water Index Number is an alphanumeric water feature identification system used by New York State agencies. In the Hydrology Data set the I.D. is applied only to the stream reaches represented by line types "s", "scl", and "ap".
Definition Source
New York State Department of Environmental Conservation
Length
Arc length (Internal Software Attribute, in Map Units)
Definition Source
Tompkins County ITS GIS Division, 2000
Ltype
Type of water feature
s
stream - a body of moving water represented by a single line typically 2 meters wide
sb
stream bank - the shoreline of a body of moving water (typically 2 meters wide) represented by two lines
pd
pond - The perimeter of a standing body of water 10 acres, with a predominantly natural shoreline
lk
lake - the perimeter of a standing body of water 10 acres, with a predominantly natural shoreline
res
reservoir - the perimeter of a constructed basin 10 acres, formed to contain water or other liquids
dam
dam - a barrier constructed to control or monitor the water level. (used in this field only when there is no reservoir above the dam. When a reservoir is present, then "res" is used for this field and "dam" is used in the mmchannel field)
island
the shoreline of any landmass larger .5 acres that is completely surrounded by water
scl
stream centerline is a generalized abstract line drawn approximately equidistant between two stream banks
ap
An artificial path (ap) is an abstract line representing a stream passing through lakes, reservoirs, ponds, wetlands
Definition Source
Tompkins County ITS GIS Division, 2000
Mmchannel
Man made features assigned where applicable to arcs with line type attributes "s", "scl", or "ap".
d
ditch - an excavated channel along a roadway or field constructed to direct and/or confine a water course
ch
channelization - a water course that is contained within banks constructed of concrete, rip-rap, or some other man-made wall but is not constructed for motorize water traffic
c
canal - a water course that is channelized and maintained for motorized water traffic
m
marina - a protected body of water constructed spacifically for the mooring of boats, including it's access channel to open water
dam
dam
Definition Source
Tompkins County ITS GIS Division, 2000
Name
For Line types "s", "scl", and "ap" the names of streams are provided as they appear on USGS Quadrangle maps. A few local stream names were added when requested.
Priorityh2o
Priority Waterbodies indentification number from New York State Department of Environmental Conservation 1998 303(d) List of the Clean Water Act. Priority waterbodies are identified so that priority effort will be given to developing solutions to water quality problems. Assigned to applicable streams with a line type attribute of "s", "scl", or "ap".
Protected
A water quality code ,used by NYS/DEC, assigned to all arcs in the county hydrography dataset with a line type equal to "s", "scl", or "ap" that are also part ot the NYS/DEC Water Index Number data set.. Each stream segment that is coded in this data set with an entry in the protected field has some level of "protected" status.
AA
(a) The best usages of Class AA waters are: a source of water supply for drinking, culinary or food processing purposes; primary and secondary contact recreation; and fishing. The waters shall be suitable for fish propagation and survival. (b) This classification may be given to those waters that, if subjected to approved disinfection treatment, with additional treatment if necessary to remove naturally present impurities, meet or will meet New York State Department of Health drinking water standards and are or will be considered safe and satisfactory for drinking water purposes.
A
a) The best usages of Class A waters are: a source of water supply for drinking, culinary or food processing purposes; primary and secondary contact recreation; and fishing. The waters shall be suitable for fish propagation and survival. (b)This classification may be given to those waters that, if subjected to approved treatment equal to coagulation, sedimentation, filtration and disinfection, with additional treatment if necessary to reduce naturally present impurities, meet or will meet New York State Department of Health drinking water standards and are or will be considered safe and satisfactory for drinking water purposes
B
The best usages of Class B waters are primary and secondary contact recreation and fishing. These waters shall be suitable for fish propagation and survival.
C
The best usage of Class C waters is fishing. These waters shall be suitable for fish propagation and survival. The water quality shall be suitable for primary and secondary contact recreation, although other factors may limit the use for these purposes.
T
Suitable for trout propagation.
S
Trout spawning habitat.
Source
Origin of arc data or most accurate source used to position a stream arc segment where a stream is known to exist
hyd
hydrology -hydrology data originating from planimetric base map 1991 The accuracy of the data set is limited to the accuracy of the 1991 Tompkins County Planimetric Base Map series.
nhd
arcs added where streams were identified in the National Hydrography Dataset but did not appear in the planimetric hydrology data or any other data source
new
typically used for centerlines drawn between streambanks and for artificial paths where issues of positional accuracy are not applicable.
topo
topograhphic contours were used to locate streams known to exist but with no other visible way of positionally locating them
doqq
1995 digital ortho quarter quadrangles
lulc
land use/land class - data originating from Tompkins Co. land use/land cover inventory based on 1995 DOQQ's. Used primarily to identify wetlands for the location of artifical paths.
win
Arcs added where streams were identified in the DEC/Water Index Number maps but did not appear in the planimetric hydrology data
plan
arcs, typically representing culverts and bridges, added using road edge planimetrics to complete gaps in the original hydro data.
field
arcs added using data collected on field maps generated from planimetric hydrology data.
survey
surveys provided by various sources to document the existing of streams that did not otherwise appear in the county stream data.
99photo
April 1999 color photography 1:1100 used to verify the positional accuracy of arcs and in some cases to verifiy the existance of stream sections that did not appear on other data sources.
Definition Source
Tompkins County ITS GIS division
Status
An editing status field.
f
field verified during a visit to the site.
v
verify - the accuracy of one or more of the attributes is questionable
Strindex
Strahler Index number used to rank relative stream size for all arcs in the county hydrography dataset with a line type equal to "s", "scl", or "ap". This classification system begins with smaller numbers representing headwater streams and progressing to larger numbers downstream as more tributaries enter. This is a standard in simple stream classification first set forth by R.E. Horton and A.E. Strahler.
Tcid
A unique identifier assigned to all arcs in the county hydrography dataset with a line type equal to "s", "scl", or "ap". This identifier includes information about the watershed that it is a part of, it's relative location in that watershed, and whether or not it is included in the DEC, NHD, or Priority Water Bodies datasets.-Confluence to confluence reaches are consecutively lettered with lower case letters, tributaries are consecutively numbered, and capital letters are used to signify its inclusion in another data set. -The TCID code for each stream reach will begin with the name of the watershed that it is from. -Beginning at the confluence of the main stream, each tributary of that main stream is numbered consecutively as you progress up stream. -Tributaries to each of these tributaries will be consecutively numbered in an upstream direction until all tributaries are numbered. -This process of consecutively numbering tributaries of a stem tributary continues until all tributaries have received a number. - Reaches defined by the confluence of two tributaries will be consecutively lettered beginning at the mouth of the stream and progressing upstream, using lower case letters, beginning with "a" and if necessary starting over and progressing through "aa, ab" until you reach it’s headwater reach. This process is repeated for consecutive reaches of each tributary until all confluence to confluence reaches have received a letter code. -For streams with headwaters outside of Tompkins County and with a confluence in Cayuga Lake, the coding system ends at the county boundary. -For streams with their headwaters in the county that eventually exit across the county boundary, coding for the portions outside the county boundary uses the NYS/DEC Water Index Number map to determine reaches. As the coding proceeds upstream past the county boundary the County Hydrography is used to identify reaches for coding. -If a reach is included in the state DEC stream data set, then the TCID will end in "S". -If a reach is included in the NHD, then the Tompkins County reach code will end with "N". -If a reach is included in the state Priority Water Bodies Inventory list, then the TCID for that reach will end in "P". -If a reach is included in both the DEC and the NHD data sources, then the TCID will end in "SN". ("SNP " will be used when a reach is included in all three data sources.) -If in the future a tributary is added to the county stream data set, it is given a decimal equivalent to its relative distance upstream to the next tributary. (ie. If a tributary were added approximately half way between tributaries 3 and 4, then the new tributary number would be 3.5) - When a reach is divided by the addition of a new tributary, a .1 and .2 decimal is added to the new reaches. .1 is added to the downstream reach and .2 is added to the upstream reach. (ie. If reach Salmon-f were divided the resulting reaches would be Salmon-f.1 and Salmon-f.2)
Watershed
The name of watershed is provided for all arcs. Watersheds are typically defined by a line that divides two adjacent stream systems or groups of smaller streams that flow into Cayuga Lake. A coverage exists that represents the watershed deliniations within Tompkins County and this coverage is the basis for the Hydrography watershed divisions.
Definition Source
Tompkins County ITS GIS Division, 2000
Distribution Information
Format Name
Shapefile
Format Name
metadata
Format Name
HTML metadata
Format Name
KML
Format Name
GeoJSON
Format Name
OGC:WMS
Distributor
Albert R. Mann Library
Online Access
https://cugir-data.s3.amazonaws.com/00/74/97/cugir-007497.zip
Online Access
https://cugir-data.s3.amazonaws.com/00/74/97/fgdc.xml
Online Access
https://cugir-data.s3.amazonaws.com/00/74/97/fgdc.html
Online Access
https://cugir.library.cornell.edu/geoserver/cugir/wfs?version=1.0.0request=GetFeaturetypeName=cugir007497outputFormat=application%2Fvnd.google-earth.kml%2Bxml
Online Access
https://cugir.library.cornell.edu/geoserver/cugir/wfs?version=1.0.0request=GetFeaturetypeName=cugir007497outputFormat=application%2Fjson
Online Access
https://cugir.library.cornell.edu/geoserver/cugir/wms?version=1.1.0request=GetMaplayers=cugir007497bbox=-76.78548866,42.24234827,-76.22175734,42.96568273width=199height=256srs=EPSG:4326format=image/png
Name
Metadata Reference Information
Metadata Date
20190524
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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