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Connecticut Hydrography Subset Poly
SDE Feature Class - depgis.DEP.HYDROGRAPHY_SUBSET_POLY
FGDC, ESRI Metadata
DescriptionGraphicSpatialData StructureData QualityData SourceData DistributionMetadata
+ Resource Description
Citation
Information used to reference the data.
Title: Connecticut Hydrography Subset Poly
Originators: State of Connecticut, Department of Environmental Protection (data compiler, editor and publisher)
U.S. Geological Survey, National Mapping Program (data compiler)
Publisher: State of Connecticut, Department of Environmental Protection
Publication place: Hartford, Connecticut, USA
Publication date: 19940101
Edition: 2005
Data type: vector digital data
Data location: http://www.ct.gov/deep
Other citation details:
The USGS is the collector of the data (compiler). The State of Connecticut, Department of Environmental Protection is the creator and maintainer of the data layer (editor) and producer (publisher) of this information for use. The 2005 Edition essentially includes the same set of geographic features published in 1994. However, the 2005 Edition differs from information published in 1994 primarily as a result of corrections and improvements to feature geometry and feature attribute information. Previously undetected errors have been corrected. Also, some feature attribute information (data fields) have been slightly modified and made easier to use. This layer includes information that is relatively static and does not change over time. Data compiled at 1:24,000 scale. The 2005 Edition is the last version of this data layer.
Description
A characterization of the data, including its intended use and limitations.
Abstract:
Hydrography Subset Polygon includes the polygon features of a layer named Hydrography Subset. Hydrography Subset is a 1:24,000-scale, polygon and line feature-based layer that includes a prescribed set of hydrography features depicted on the U.S. Geological Survey (USGS) 7.5 minute topographic quadrangle maps for the State of Connecticut plus connecting lines that replace certain polygon features or bridge gaps in the hydrography in order to depict the hydrologic connections between upstream and downstream surface waterbodies. The hydrography features include perennial watercourses, waterbodies of at least 2.5 acres, dams, natural and manmade shorelines, ditches needed for connectivity, non-headwater intermittent streams, islands of at least 2.5 acres and stream connectors. Hydrography Subset is comprised of polygon and line features. Polygon features represent areas of water for rivers, streams, brooks, reservoirs, lakes, ponds, bays, coves, and harbors. Polygon features also depict dams and islands shown on the USGS 7.5 minute topographic quadrangle maps. Line features represent single-line rivers, streams, ditches, connectors replacing omitted ponds or marshes and connectors bridging gaps at underground watercourses. Line features also enclose all polygon features in the form of natural or manmade shorelines, dams, and closure lines separating adjacent waterbodies or forming the artificial end of a waterbody (data extent). The Hydrography Subset layer is based on information from USGS topographic quadrangle maps published between 1969 and 1984 so it does not depict conditions at any one particular point in time. Also, the layer does not reflect recent changes with the course of streams or location of shorelines impacted by natural events or changes in development since the time the USGS 7.5 minute topographic quadrangle maps were published. Attribute information is comprised of codes to identify hydrography features by type and describe feature area and length. The Hydrography Subset layer does not include bathymetric, stream gradient, water flow, water quality, or biological habitat information. The Hydrography Subset is not a hydrography network for modeling the direction of streamflow. This layer was originally published in 1994. The 2005 edition includes the same water features published in 1994, however some attribute information has been slightly modified and made easier to use. Also, the 2005 edition corrects previously undetected attribute coding errors.
Purpose:
Hydrography Subset is 1:24,000-scale base map data for use where the connectivity of surface water is important or where the complexity of the full detail of the 1:24,000-scale Hydrography layer is not desired. The original intent of this layer was to make a lighter-weight version of hydrography available to users at a time when a personal computer's resources were often limited and the full hydrography did not contain attributes such as waterbody names that could be used to reduce the size of the dataset through querying. An enduring benefit comes from the stream connectivity introduced by the addition of line connectors that replace certain polygon features. The Hydrography Subset depicts a prescribed set of the hydrography information published on the USGS topographic quadrangle maps. For base map purposes, use this layer with other 1:24,000-scale base map data such as Roads and Trails, Railroads, Airports, and Towns. The connectors in this layer may be used as a possible data source for other 1:24,000-scale layers with features that must coincide and line up with stream and shoreline features published on the USGS topographic quadrangle maps. The Hydrography Subset layer is not intended for maps printed at map scales greater or more detailed than 1:24,000 scale (1 inch = 2,000 feet.)
Supplemental information:
In 2004, the State of Connecticut, Department of Environmental Protection developed an automated procedure to maintain feature topology and attribute integrity for the Hydrography Subset layer. Using ArcInfo Workstation 8.3 software, this automated procedure was developed to systematically maintain a set of related hydrography data for the State of Connecticut, Department of Environmental Protection. These automated procedures were developed using the Arc Macro Language (AML) scripting environment and are recorded in an AML file named MAKECOVER.AML for the hydrography category of data for the State of Connecticut, Department of Environmental Protection.  The MAKECOVER.AML maintains the features and feature attribute data for the Hydrography, Hydrography Subset, Waterbody, Named Waterbody, and Named Waterbody Connectors layers. For additional information related to the original source of data from the U.S. Geological Survey, refer to the Data User Guides and Standards for 1:24,000-Scale Digital Line Graphs and Quadrangle Maps available from the U.S. Geological Survey, National Mapping Program.
Language of dataset: en
Point Of Contact
Contact information for the individual or organization that is knowledgeable about the data.
Organization: State of Connecticut, Department of Environmental Protection
Person: Howie Sternberg
Phone: 860-424-3540
Fax: 860-424-4058
Email: dep.gisdata@ct.gov
Hours of service: Monday to Friday, 08:30 to 16:30 Eastern Standard Time
Address type: mailing and physical address
Address:
79 Elm Street
City: Hartford
State or Province: Connecticut
Postal code: 06106-5127
Country: USA
Data Type
How the data are represented, formatted and maintained by the data producing organization.
File or table name: depgis.DEP.HYDROGRAPHY_SUBSET_POLY
Data type: vector digital data
Data format: SDE Feature Class
Native dataset environment: These data are maintained by the State of Connecticut using ArcGIS software developed by Environmental Systems Research Institute (ESRI) in a Microsoft Windows operating system environment.
Time Period of Data
Time period(s) for which the data corresponds to the currentness reference.
Beginning date: 1969
Ending date: 1984
Currentness reference:
Publication dates of the USGS 7.5 minute topographic quadrangle maps for the State of Connecticut through 1984.
Status
The state of and maintenance information for the data.
Data status: Complete
Update frequency: None planned
Key Words
Words or phrases that summarize certain aspects of the data.
Theme:
Keywords: digital line graph, DLG, large scale, hydrography, river, stream, lake, pond, water, waterbody, base map
Keyword thesaurus: None
Place:
Keywords: Connecticut, CT
Keyword thesaurus: U.S. Department of Commerce, 1987, Codes for the Identification of the States, the District of Columbia and the Outlying Areas of The United States, and Associated Areas (Federal Information Processing Standard 5-2): Washington, DC, National Institute of Standards and Technology.
Place:
Keywords: United States of America, USA
Keyword thesaurus: U.S. Department of Commerce, 1995, Countries, Dependencies, Areas of Special Sovereignty, and Their Principal Administrative Divisions (Federal Information Processing Standard (FIPS) 10-4): Washington, D.C., National Institute of Standards and Technology.
Data Access Constraints
Restrictions and legal prerequisites for accessing or using the data after access is granted.
Access constraints:
None. The data is in the public domain and may be redistributed.
Use constraints:
No restrictions or legal prerequisites for using the data. The data is suitable for use at appropriate scale, and is not intended for maps printed at scales greater or more detailed than 1:24,000 scale (1 inch = 2,000 feet). Although this data set has been used by the State of Connecticut, Department of Environmental Protection, no warranty, expressed or implied, is made by the State of Connecticut, Department of Environmental Protection as to the accuracy of the data and or related materials. The act of distribution shall not constitute any such warranty, and no responsibility is assumed by the State of Connecticut, Department of Environmental Protection in the use of these data or related materials. The user assumes the entire risk related to the use of these data. Once the data is distributed to the user, modifications made to the data by the user should be noted in the metadata. When printing this data on a map or using it in a software application, analysis, or report, please acknowledge the State of Connecticut, Department of Environmental Protection and the U.S. Geological Survey, National Mapping Program as the source for this information. For example, include the following data source description when printing this layer on a map: Hydrography - From the Hydrography Subset layer, compiled and published by CT DEP and USGS. Source map scale is 1:24,000.
+ Graphic Example
Browse Graphic
Graphic illustration of the data.
Browse graphic 1
Open - Detail view of Hydrography Subset polygon and line featurres
Graphic Image
+ Spatial Reference Information
Horizontal Coordinate System
Reference system from which linear or angular quantities are measured and assigned to the position that a point occupies.
Projected coordinate system:
Name: NAD 1983 StatePlane Connecticut FIPS 0600 Feet
Map units: survey feet
Geographic coordinate system:
Name: GCS North American 1983
Coordinate System Details
Map projection
Map projection name: Lambert Conformal Conic
Standard parallel: 41.200000
Standard parallel: 41.866667
Longitude of central meridian: -72.750000
Latitude of projection origin: 40.833333
False easting: 999999.999996
False northing: 499999.999998
Planar Coordinate Information
Planar coordinate encoding method: coordinate pair
Coordinate representation:
Abscissa resolution: 0.000250
Ordinate resolution: 0.000250
Planar distance units: survey feet
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: 298.257222
Vertical Coordinate System
Reference system from which vertical distances (altitudes or depths) are measured.
Altitude system definition:
Altitude resolution: 1.000000
Altitude encoding method: Explicit elevation coordinate included with horizontal coordinates
Spatial Domain
The geographic areal domain of the data that describes the western, eastern, northern, and southern geographic limits of data coverage.
Bounding Coordinates
In Projected or local coordinates
NAD 1983 StatePlane Connecticut FIPS 0600 Feet
BoundaryCoordinate
Left723556.313000 (survey feet)
Right1275113.875000 (survey feet)
Top971913.937000 (survey feet)
Bottom516816.375000 (survey feet)
In Unprojected coordinates (geographic)
GCS North American 1983
BoundaryCoordinate
West-73.768979 (longitude)
East-71.735922 (longitude)
North42.128442 (latitude)
South40.875098 (latitude)
+ Data Structure and Attribute Information
Overview
Summary of the information content of the data, including other references to complete descriptions of entity types, attributes, and attribute values for the data.
Direct spatial reference method: Vector
Indirect spatial reference method: State of Connecticut, United States of America
Attributes of Connecticut Hydrography Subset Poly
Detailed descriptions of entity type, attributes, and attribute values for the data.
Name: depgis.DEP.HYDROGRAPHY_SUBSET_POLY
Type of object: Feature Class
Geometry type: Polygon
Number of records: 3144
Description:
Hydrography as polygon features
Attributes
OBJECTID
Definition:
Internal feature number.
Alias: OBJECTID Type: OID Width: 4 Precision: 10 Scale: 0
Attribute values: Sequential unique whole numbers that are automatically generated.
Attribute definition source:
ESRI
Shape
Definition:
Feature geometry.
Alias: HSPOLY_COD Type: Double Width: 8 Precision: 16 Scale: 5
Attribute values: Coordinates defining the features.
Attribute definition source:
ESRI
HSPOLY_COD
Definition:
Hydrography Subset Polygon Code. Numeric values that identify hydrography subset polygon feature types.
Alias: HYSUB_POLY Type: String Width: 50 Precision: 0 Scale: 0Output width: 10
Attribute domain values
ValueDefinition
0
Not Hydrography
116
Open Water, Bay, Estuary, Gulf, Ocean
121
Island (2.5 acres or larger)
406
Dam or Weir
412
Stream, River or Brook
414
Ditch or Canal
421
Lake or Pond (2.5 acres or larger)
Attribute definition source:
State of Connecticut, Department of Environmental Protection
HYSUB_POLY
Definition:
Hydrography Subset Polygon Type. Text values that correspond to the HSPOLY_COD attribute values. HYSUB_POLY is the English language of (decodes) the HSPOLY_COD field.
Alias: IMS_LEGEND Type: String Width: 20 Precision: 0 Scale: 0Output width: 50
Attribute values: See Enumerated Domain Value for HSPOLY_COD
Attribute definition source:
State of Connecticut, Department of Environmental Protection
IMS_LEGEND
Definition:
Internet Mapping Software Legend. Text field for classifying and symbolizing hydrography line feature types in a simple manner for an Internet map.
Alias: ACREAGE Type: Double Width: 8 Precision: 38 Scale: 8Output width: 20
Attribute domain values
ValueDefinition
No Show
This category includes HSPOLY_COD 0 and 121
Dam
This category includes HSPOLY_COD 406
Water
This category includes HSPOLY_COD 116, 412, 414 and 421
Attribute definition source:
State of Connecticut, Department of Environmental Protection
ACREAGE
Definition:
Calculated area of a polygon feature in acres. Note, ACREAGE values are not automatically updated after modifying feature geometry (shape). Values must be recalculated after features are edited, simplified, clipped, dissolved, etc.
Alias: Shape Type: Geometry Width: 4 Precision: 0 Scale: 0Output width: 12
Attribute values: Numeric value
Attribute definition source:
State of Connecticut, Department of Environmental Protection
SHAPE
Definition:
Feature geometry.
Alias: AV_LEGEND Type: String Width: 20 Precision: 0 Scale: 0
Attribute values: Coordinates defining the features.
Attribute definition source:
ESRI
AV_LEGEND
Definition:
ArcView Legend. Text field for classifying and symbolizing hydrography line feature types on a map.
Alias: SHAPE.area Type: Double Width: 0 Precision: 0 Scale: 0Output width: 20
Attribute domain values
ValueDefinition
No Show
This category includes HSPOLY_COD 0 and 121
Dam
This category includes HSPOLY_COD 406
Water
This category includes HSPOLY_COD 116, 412, 414 and 421
Attribute definition source:
State of Connecticut, Department of Environmental Protection
SHAPE.area
Alias: SHAPE.len Type: Double Width: 0 Precision: 0 Scale: 0
SHAPE.len
Alias: SHAPE.len Type: Double Width: 0 Precision: 0 Scale: 0
ESRI Feature Description
Description of spatial objects in the data using the Environmental Systems Research Institute (ESRI) terminology.
Environmental Systems Research Institute (ESRI) terms
depgis.DEP.HYDROGRAPHY_SUBSET_POLY
ESRI feature type: Simple
Geometry type: Polygon
Topology: FALSE
Feature count: 3144
Spatial index: TRUE
Linear referencing: FALSE
SDTS Feature Description
Description of point and vector spatial objects in the data using the Spatial Data Transfer Standards (SDTS) terminology.
Spatial data transfer standard (SDTS) terms
depgis.DEP.HYDROGRAPHY_SUBSET_POLY
Type: G-polygon
Count: 3144
+ Data Quality and Accuracy Information
General
Information about the fidelity of relationships, data quality and accuracy tests, omissions, selection criteria, generalization, and definitions used to derive the data.
Logical consistency report:
Polygon features conform to the following topological rules. Polygons are single part. There are no duplicate polygons. Polygons do not self overlap. Polygons do not overlap other polygons. Polygons are bound by lines. Line features conform to the following topological rules. Lines are single part. There are no duplicate lines. Lines do not self overlap. Lines do not overlap other lines. Lines intersect only at nodes, and nodes anchor the ends of all lines. Lines do not overshoot or undershoot other lines they are supposed to meet and intersect. The tests of logical consistency were performed by the State of Connecticut using ESRI ArcInfo software to maintain feature topology in ArcInfo coverage format. The data is topologically clean. The ArcInfo Clean function was repeatedly used following edits to verify topology and enforce a minimum distance between vertices of 4 feet (fuzzy tolerance) and a minimum allowed overshoot length of 10 feet (dangle length).
Completeness report:
The Hydrography Subset is a set of hydrography features selected from the Hydrography layer according to certain rules and is, therefore, not a complete set of hydrography features. The completeness of the Hydrography data reflects the USGS National Mapping Division standards for  feature content of the data sources, which are the Large Scale (7.5 minute) Digital Line Graph (DLG) files available from the USGS. For Connecticut, the Large Scale DLG files used to create this layer are for the 1:24,000-scale topographic quadrangle maps published between 1969 and 1984. The Hydrography layer used as a source is complete in the sense that it accurately reflects the contents of the most recently published USGS topographic quadrangle maps available at the time the State of Connecticut, Department of Environmental Protection began creating the layer. More recent quadrangle maps have been published by the USGS since 1984; however, the State of Connecticut did not incorporate this information into the Hydrography Subset layer. So compared to the most recent set of topographic quadrangle maps available today, the Hydrography Subset layer is incomplete, and substantially incomplete when compared to waterbodies present today. This data is not updated.
Attribute Accuracy
Accuracy of the identification of data entities, features and assignment of attribute values.
Attribute accuracy report:
The Hydrography Subset layer attributes are based on the feature types identified by the USGS. All attributes have valid values. Values are within defined domains. The accuracy of the HSARC_COD and HSPOLY_COD attribute values is inherited from the Hydrography data. The attributes were generalized by computer reassignment of code values based upon table joins to lookup tables to aggregate similar types of features. The HYSUB_ARC, HYSUB_POLY, AV_LEGEND, and IMS_LEGEND attribute values are based on HSARC_COD and HSPOLY_COD values. HYSUB_POLY is the English language equivalent of (decodes) the HSPOLY_COD field for polygon features. HYSUB_ARC is the English language equivalent of (decodes) the HSARC_COD field for line features. AV_LEGEND and IMS_LEGEND are broad classifications of HSPOLY_COD and HSARC_COD values for polygon and line features, respectively. Based on the HSPOLY_COD and HSARC_COD attribute values, the  HYSUB_POLY, HYSUB_ARC, AV_LEGEND, and IMS_LEGEND fields were populated through table joins to lookup tables. These decode values were not manually entered. The ACREAGE (area in acres) field was automatically calculated for each polygon feature based on computer generated feature area in square feet. The LENGTH_MI (length in miles) field was automatically calculated for each line feature base on computer generated feature length in feet.
Positional Accuracy
Accuracy of the positional aspects of the data.
Horizontal accuracy report:
This data complies with United States National Map Accuracy Standards for 1:24,000 scale maps regarding the features selected from the Hydrography layer. According to this standard, not more than 10 percent of the points tested are to be in error by more than 1/50 inch (40 feet) measured on the publication scale of a USGS 7.5 minute topographic quadrangle map. The connectors added to the Hydrography Subset layer begin and end at established hydrography features. The connectors represent an assumed path between connected features and not necessarily an actual path.
+ Data Source and Process Information
Data Sources
Information about the source data used to construct or derive the data.
Data source information
Source 1 - Hydrography
Title: Hydrography
Originators: State of Connecticut, Department of Environmental Protection (data editor and publisher)
U.S. Geological Survey, National Mapping Program (data compiler)
Publisher: State of Connecticut, Department of Environmental Protection
Publication place: Hartford, Connecticut, USA
Publication date: 1969-1984
Data type: vector digital data
Map scale denominator: 24000
Media: disc
Source contribution:
Polygon and line features that define portions of open water features such as rivers, streams, brooks, reservoirs, lakes,, ponds, bays, harbors, and coves were used. Other related features such as marsh areas, aqueducts and the majority of ditches, canals or intermittent watercourses were not incorporated into the Hydrography Subset. The Hydrography is in ArcInfo Coverage format.
Beginning date: 1969
Ending date: 1984
Currentness reference:
publication date
Source 2 - Streams, Lakes and Ponds Mylar manuscripts
Title: Named Streams, Lakes and Ponds Mylar Manuscripts
Originators: State of Connecticut, Department of Environmental Protection (data compiler)
Publisher: State of Connecticut, Department of Environmental Protection
Publication place: Hartford, Connecticut, USA
Publication date: 1994
Data type: map
Map scale denominator: 24000
Media: stable-base material
Source contribution:
This data source is a set of Mylar overlays delineating all rivers, streams, brooks, reservoirs, lakes, and ponds that appear on the 1:24,000-scale 7.5 minute topographic quadrangle maps published by the USGS for Connecticut. This data set contains lines representing the connectivity of water features. The Named Streams, Lakes and Ponds Mylars were originally compiled and mapped by James Bogar, a Cartographer with the State of Connecticut, Department of Environmental Protection.
Date: 1994
Source 3 - Hydrography Subset
Title: Hydrography Subset
Originators: State of Connecticut, Department of Environmental Protection (data compiler, editor and publisher)
U.S. Geological Survey, National Mapping Program (data compiler)
Publisher: State of Connecticut, Department of Environmental Protection
Publication place: Hartford, Connecticut, USA
Publication date: 1994
Data type: vector digital data
Map scale denominator: 24000
Media: disc
Source contribution:
Various editions of Hydrography Subset are identified as both a Source Used and a Source Produced during the Process Steps. The Hydrography Subset is in ArcInfo Coverage format.
Date: 1994
Currentness reference:
Publication dates of the USGS 7.5 minute topographic quadrangle maps for the State of Connecticut through 1984.
Source 4 - Hydrography_Subset_Poly.shp
Title: Hydrography Subset Polygon
Originators: State of Connecticut, Department of Environmental Protection (data compiler, editor and publisher)
U.S. Geological Survey, National Mapping Program (data compiler)
Publisher: State of Connecticut, Department of Environmental Protection
Publication place: Hartford, Connecticut, USA
Data location: http://www.ct.gov/deep
Map scale denominator: 24000
Media: disc
Source contribution:
Includes all polygon features from the Hydrography Subset where the AV_LEGEND attribute was not equal to a value of "No Show" (AV_LEGEND <> "No Show"). This criterion only includes true hydrography features and excludes secondary polygon features from the ArcInfo coverage that represent areas of land completely enclosed by water features. The Hydrography_Subset_Poly.shp is in Shapefile format.
Process Steps
Information about events, parameters, tolerances and techniques applied to construct or derive the data.
Process step information
Process Step 1
Process description:
Replacement of polygon features by line features - An ArcInfo Macro Language (AML) script was developed to programatically select ponds less than 2.5 acres in size that are found along the course of streams and replace them with line connector features. All ponds less than 2.5 acres in size and their dams were deleted. The pond connectors were checked visually on-screen and vertices were added to keep the shape of the connector within the bounds of the original pond feature. The connectors to replace marsh features or to bridge gaps in the original hydrography where a watercourse was not delineated were digitized on-screen while visually referencing the Streams, Lakes and Ponds Mylar manuscripts as a guide. Each of the three types of connectors (stream connector replacing omitted pond, stream connector replacing omitted marsh, stream connector replacing omitted misc feature) was assigned its own HSARC_COD attribute value.
Process date: 1994
Data Source used
Source 1 - Hydrography
Title: Hydrography
Originators: State of Connecticut, Department of Environmental Protection (data editor and publisher)
U.S. Geological Survey, National Mapping Program (data compiler)
Publisher: State of Connecticut, Department of Environmental Protection
Publication place: Hartford, Connecticut, USA
Publication date: 1969-1984
Data type: vector digital data
Map scale denominator: 24000
Media: disc
Source contribution:
Polygon and line features that define portions of open water features such as rivers, streams, brooks, reservoirs, lakes,, ponds, bays, harbors, and coves were used. Other related features such as marsh areas, aqueducts and the majority of ditches, canals or intermittent watercourses were not incorporated into the Hydrography Subset. The Hydrography is in ArcInfo Coverage format.
Beginning date: 1969
Ending date: 1984
Currentness reference:
publication date
Source 2 - Streams, Lakes and Ponds Mylar manuscripts
Title: Named Streams, Lakes and Ponds Mylar Manuscripts
Originators: State of Connecticut, Department of Environmental Protection (data compiler)
Publisher: State of Connecticut, Department of Environmental Protection
Publication place: Hartford, Connecticut, USA
Publication date: 1994
Data type: map
Map scale denominator: 24000
Media: stable-base material
Source contribution:
This data source is a set of Mylar overlays delineating all rivers, streams, brooks, reservoirs, lakes, and ponds that appear on the 1:24,000-scale 7.5 minute topographic quadrangle maps published by the USGS for Connecticut. This data set contains lines representing the connectivity of water features. The Named Streams, Lakes and Ponds Mylars were originally compiled and mapped by James Bogar, a Cartographer with the State of Connecticut, Department of Environmental Protection.
Date: 1994
Data Source produced
Source 3 - Hydrography Subset
Title: Hydrography Subset
Originators: State of Connecticut, Department of Environmental Protection (data compiler, editor and publisher)
U.S. Geological Survey, National Mapping Program (data compiler)
Publisher: State of Connecticut, Department of Environmental Protection
Publication place: Hartford, Connecticut, USA
Publication date: 1994
Data type: vector digital data
Map scale denominator: 24000
Media: disc
Source contribution:
Various editions of Hydrography Subset are identified as both a Source Used and a Source Produced during the Process Steps. The Hydrography Subset is in ArcInfo Coverage format.
Date: 1994
Currentness reference:
Publication dates of the USGS 7.5 minute topographic quadrangle maps for the State of Connecticut through 1984.
Process Step 2
Process description:
Attribute value reclassification - Feature codes in HSARC_COD and HSPOLY_COD were simplified by reclassifying certain features to a more general code. For example a siphon became a stream, a cranberry bog became a pond, a spillway or canal lock became a dam.
Data Source used
Source 3 - Hydrography Subset
Title: Hydrography Subset
Originators: State of Connecticut, Department of Environmental Protection (data compiler, editor and publisher)
U.S. Geological Survey, National Mapping Program (data compiler)
Publisher: State of Connecticut, Department of Environmental Protection
Publication place: Hartford, Connecticut, USA
Publication date: 1994
Data type: vector digital data
Map scale denominator: 24000
Media: disc
Source contribution:
Various editions of Hydrography Subset are identified as both a Source Used and a Source Produced during the Process Steps. The Hydrography Subset is in ArcInfo Coverage format.
Date: 1994
Currentness reference:
Publication dates of the USGS 7.5 minute topographic quadrangle maps for the State of Connecticut through 1984.
Data Source produced
Source 3 - Hydrography Subset
Title: Hydrography Subset
Originators: State of Connecticut, Department of Environmental Protection (data compiler, editor and publisher)
U.S. Geological Survey, National Mapping Program (data compiler)
Publisher: State of Connecticut, Department of Environmental Protection
Publication place: Hartford, Connecticut, USA
Publication date: 1994
Data type: vector digital data
Map scale denominator: 24000
Media: disc
Source contribution:
Various editions of Hydrography Subset are identified as both a Source Used and a Source Produced during the Process Steps. The Hydrography Subset is in ArcInfo Coverage format.
Date: 1994
Currentness reference:
Publication dates of the USGS 7.5 minute topographic quadrangle maps for the State of Connecticut through 1984.
Process Step 3
Process description:
Final processing - Line features were unsplit based on the HSARC_COD attribute field to reduce the number of line feature records. Line features were not generalized (smoothed) and retain the original shape inherited from the Hydrography layer. Final visual inspection, editing and cleaning was done to assure connectivity and enforce line and polygon topology rules. The Hydrography Subset was created from the Hydrography layer before stream and lake names were assigned to the individual Hydrography features, therefore, no waterbody name attributes exist in the subset.
Organization: State of Connecticut, Department of Environmental Protection
Person: Diana Danenberg
Process date: 1994
Data Source used
Source 3 - Hydrography Subset
Title: Hydrography Subset
Originators: State of Connecticut, Department of Environmental Protection (data compiler, editor and publisher)
U.S. Geological Survey, National Mapping Program (data compiler)
Publisher: State of Connecticut, Department of Environmental Protection
Publication place: Hartford, Connecticut, USA
Publication date: 1994
Data type: vector digital data
Map scale denominator: 24000
Media: disc
Source contribution:
Various editions of Hydrography Subset are identified as both a Source Used and a Source Produced during the Process Steps. The Hydrography Subset is in ArcInfo Coverage format.
Date: 1994
Currentness reference:
Publication dates of the USGS 7.5 minute topographic quadrangle maps for the State of Connecticut through 1984.
Data Source produced
Source 3 - Hydrography Subset
Title: Hydrography Subset
Originators: State of Connecticut, Department of Environmental Protection (data compiler, editor and publisher)
U.S. Geological Survey, National Mapping Program (data compiler)
Publisher: State of Connecticut, Department of Environmental Protection
Publication place: Hartford, Connecticut, USA
Publication date: 1994
Data type: vector digital data
Map scale denominator: 24000
Media: disc
Source contribution:
Various editions of Hydrography Subset are identified as both a Source Used and a Source Produced during the Process Steps. The Hydrography Subset is in ArcInfo Coverage format.
Date: 1994
Currentness reference:
Publication dates of the USGS 7.5 minute topographic quadrangle maps for the State of Connecticut through 1984.
Process Step 4
Process description:
Datum conversion - Using ESRI ArcInfo software, the Hydrography layer was converted from the Connecticut State Plane Coordinate System of 1927 (NAD27) to the Connecticut State Plane Coordinate System of 1983 (NAD83). The NADCON (North American Datum CONversion) data transformation was used.
Organization: State of Connecticut, Department of Environmental Protection
Person: Howie Sternberg
Process date: 1999
Data Source used
Source 3 - Hydrography Subset
Title: Hydrography Subset
Originators: State of Connecticut, Department of Environmental Protection (data compiler, editor and publisher)
U.S. Geological Survey, National Mapping Program (data compiler)
Publisher: State of Connecticut, Department of Environmental Protection
Publication place: Hartford, Connecticut, USA
Publication date: 1994
Data type: vector digital data
Map scale denominator: 24000
Media: disc
Source contribution:
Various editions of Hydrography Subset are identified as both a Source Used and a Source Produced during the Process Steps. The Hydrography Subset is in ArcInfo Coverage format.
Date: 1994
Currentness reference:
Publication dates of the USGS 7.5 minute topographic quadrangle maps for the State of Connecticut through 1984.
Data Source produced
Source 3 - Hydrography Subset
Title: Hydrography Subset
Originators: State of Connecticut, Department of Environmental Protection (data compiler, editor and publisher)
U.S. Geological Survey, National Mapping Program (data compiler)
Publisher: State of Connecticut, Department of Environmental Protection
Publication place: Hartford, Connecticut, USA
Publication date: 1994
Data type: vector digital data
Map scale denominator: 24000
Media: disc
Source contribution:
Various editions of Hydrography Subset are identified as both a Source Used and a Source Produced during the Process Steps. The Hydrography Subset is in ArcInfo Coverage format.
Date: 1994
Currentness reference:
Publication dates of the USGS 7.5 minute topographic quadrangle maps for the State of Connecticut through 1984.
Process Step 5
Process description:
Attribute enhancements - AV_LEGEND, HYSUB_POLY and HYSUB_ARC attributes were changed from storing abbreviated values in upper case (e.g. STREAM) to full length values in both upper and lower case (e.g. Stream). Additionally, the IMS_LEGEND attribute was added to establish a very general classification scheme for symbolizing hydrography features with Internet mapping software environments such as ArcIMS.
Organization: State of Connecticut, Department of Environmental Protection
Person: Diana Danenberg, Elizabeth Doran
Process date: 2001-2003
Data Source used
Source 3 - Hydrography Subset
Title: Hydrography Subset
Originators: State of Connecticut, Department of Environmental Protection (data compiler, editor and publisher)
U.S. Geological Survey, National Mapping Program (data compiler)
Publisher: State of Connecticut, Department of Environmental Protection
Publication place: Hartford, Connecticut, USA
Publication date: 1994
Data type: vector digital data
Map scale denominator: 24000
Media: disc
Source contribution:
Various editions of Hydrography Subset are identified as both a Source Used and a Source Produced during the Process Steps. The Hydrography Subset is in ArcInfo Coverage format.
Date: 1994
Currentness reference:
Publication dates of the USGS 7.5 minute topographic quadrangle maps for the State of Connecticut through 1984.
Data Source produced
Source 3 - Hydrography Subset
Title: Hydrography Subset
Originators: State of Connecticut, Department of Environmental Protection (data compiler, editor and publisher)
U.S. Geological Survey, National Mapping Program (data compiler)
Publisher: State of Connecticut, Department of Environmental Protection
Publication place: Hartford, Connecticut, USA
Publication date: 1994
Data type: vector digital data
Map scale denominator: 24000
Media: disc
Source contribution:
Various editions of Hydrography Subset are identified as both a Source Used and a Source Produced during the Process Steps. The Hydrography Subset is in ArcInfo Coverage format.
Date: 1994
Currentness reference:
Publication dates of the USGS 7.5 minute topographic quadrangle maps for the State of Connecticut through 1984.
Process Step 6
Process description:
Waterbody attribute enhancements - Previously undetected attribute value errors with HSARC_COD and HSPOLY_COD attribute values were corrected. Using Arc Macro Language (AML), an automated process (MAKECOVER.AML) was developed to maintain consistent attribute values by programmatically joining lookup data tables to decode numeric code fields and basing certain attribute information on polygon and line feature topology relationships.
Organization: State of Connecticut, Department of Environmental Protection
Person: Howie Sternberg
Process date: 2004-2005
Data Source used
Source 3 - Hydrography Subset
Title: Hydrography Subset
Originators: State of Connecticut, Department of Environmental Protection (data compiler, editor and publisher)
U.S. Geological Survey, National Mapping Program (data compiler)
Publisher: State of Connecticut, Department of Environmental Protection
Publication place: Hartford, Connecticut, USA
Publication date: 1994
Data type: vector digital data
Map scale denominator: 24000
Media: disc
Source contribution:
Various editions of Hydrography Subset are identified as both a Source Used and a Source Produced during the Process Steps. The Hydrography Subset is in ArcInfo Coverage format.
Date: 1994
Currentness reference:
Publication dates of the USGS 7.5 minute topographic quadrangle maps for the State of Connecticut through 1984.
Data Source produced
Source 3 - Hydrography Subset
Title: Hydrography Subset
Originators: State of Connecticut, Department of Environmental Protection (data compiler, editor and publisher)
U.S. Geological Survey, National Mapping Program (data compiler)
Publisher: State of Connecticut, Department of Environmental Protection
Publication place: Hartford, Connecticut, USA
Publication date: 1994
Data type: vector digital data
Map scale denominator: 24000
Media: disc
Source contribution:
Various editions of Hydrography Subset are identified as both a Source Used and a Source Produced during the Process Steps. The Hydrography Subset is in ArcInfo Coverage format.
Date: 1994
Currentness reference:
Publication dates of the USGS 7.5 minute topographic quadrangle maps for the State of Connecticut through 1984.
Process Step 7
Process description:
Export to Shapefile Format - Converted data from ArcInfo Coverage to Shapefile format and named the shapefile Hydrography_Subset_Poly.shp. Excluded the AREA, PERIMETER, HYDRO#, HYDRO-ID attributes from the Shapefile because their values are only maintained by ArcInfo software with data that is in ArcInfo Coverage format. Includes all polygon features from the Hydrography Subset where the AV_LEGEND attribute was not equal to a value of "No Show" (AV_LEGEND <> "No Show"). This criterion only includes true hydrography features and excludes secondary polygon features from the ArcInfo coverage that represent areas of land completely enclosed by water features.
Organization: State of Connecticut, Department of Environmental Protection
Person: Diana Danenberg
Process date: 20040412
Data Source used
Source 3 - Hydrography Subset
Title: Hydrography Subset
Originators: State of Connecticut, Department of Environmental Protection (data compiler, editor and publisher)
U.S. Geological Survey, National Mapping Program (data compiler)
Publisher: State of Connecticut, Department of Environmental Protection
Publication place: Hartford, Connecticut, USA
Publication date: 1994
Data type: vector digital data
Map scale denominator: 24000
Media: disc
Source contribution:
Various editions of Hydrography Subset are identified as both a Source Used and a Source Produced during the Process Steps. The Hydrography Subset is in ArcInfo Coverage format.
Date: 1994
Currentness reference:
Publication dates of the USGS 7.5 minute topographic quadrangle maps for the State of Connecticut through 1984.
Data Source produced
Source 4 - Hydrography_Subset_Poly.shp
Title: Hydrography Subset Polygon
Originators: State of Connecticut, Department of Environmental Protection (data compiler, editor and publisher)
U.S. Geological Survey, National Mapping Program (data compiler)
Publisher: State of Connecticut, Department of Environmental Protection
Publication place: Hartford, Connecticut, USA
Data location: http://www.ct.gov/deep
Map scale denominator: 24000
Media: disc
Source contribution:
Includes all polygon features from the Hydrography Subset where the AV_LEGEND attribute was not equal to a value of "No Show" (AV_LEGEND <> "No Show"). This criterion only includes true hydrography features and excludes secondary polygon features from the ArcInfo coverage that represent areas of land completely enclosed by water features. The Hydrography_Subset_Poly.shp is in Shapefile format.
ESRI geoprocessing history
Description of ESRI geoprocessing commands, settings, and tolerances applied to the data.
ESRI geoprocessing command information
1 Process
Date: 20061207 Time: 091033
Tool location: C:\Program Files\ArcGIS\ArcToolbox\Toolboxes\Data Management Tools.tbx\CopyFeatures
Command issued: CopyFeatures "F:\GeoData\Hydrography\geodatabase\New Personal Geodatabase.mdb\Hydrography_Subset_Poly" "Database Connections\depdbs11@dep.sde\depgis.DEP.Hydrography_Subset_Poly" DEPVECTORSTATIC 10000 0 0
2 CopyFeatures_65
Date: 20081215 Time: 155156
Tool location: C:\Program Files\ArcGIS\ArcToolbox\Toolboxes\Data Management Tools.tbx\CopyFeatures
Command issued: CopyFeatures "Database Connections\10.18.8.94.depgis@DEP.sde\depgis.DEP.HYDROGRAPHY_SUBSET_POLY" "Database Connections\062174-svr.depgis@DEP.sde\depgis.DEP.HYDROGRAPHY_SUBSET_POLY" DEPFEATURESTATIC 0 0 0
+ Data Distribution Information
General
Description of the data known by the party from whom the data may be obtained, liability of party distributing data, and technical capabilities required to use the data.
Resource description:
Connecticut Hydrography Subset Poly
Distribution liability:
Although this data set  has been used by the State of Connecticut, Department of Environmental Protection, no warranty, expressed or implied, is made by the State of Connecticut, Department of Environmental Protection as to the accuracy of the data and or related materials.  The act of distribution shall not constitute any such warranty, and no responsibility is assumed by the State of Connecticut, Department of Environmental Protection in the use of these data or related materials. The user assumes the entire risk related to the use of these data. Once the data is distributed to the user, modifications made to the data by the user should be noted in the metadata.
Technical prerequisites:
Geographic information system (GIS), computer-aided drawing or other mapping software is necessary to display, view and access the information.
Distribution Point of Contact
Contact information for the individual or organization distributing the data.
Organization: State of Connecticut, Department of Environmental Protection
Phone: 860-424-3540
Fax: 860-424-4058
Email: dep.gisdata@ct.gov
Hours of service: Monday to Friday, 08:30 to 16:30 Eastern Standard Time
Address type: mailing and physical address
Address:
79 Elm Street
City: Hartford
State or Province: Connecticut
Postal code: 06106-5127
Country: USA
Standard Order Process
Common ways in which data may be obtained.
Digital form:
Format name: Shapefile, Feature Class, ArcInfo Coverage
Format version number: ArcGIS
File decompression technique: Zip file
Digital transfer option:
Online option:
Computer information:
Network address:
Network resource name: http://www.ct.gov/deep
Fees: An online copy of the data may be accessed without charge.
Custom Order Process
Description of custom distribution services available.
Custom order process:
The data distributor does not provide custom GIS analysis or mapping services. Data is available in a standard format and may be converted to other formats, projections, coordinate systems, or selected for specific geographic regions by the party receiving the data.
+ Metadata Reference
Metadata Date
Dates associated with creating, updating and reviewing the metadata.
Last updated: 20111208
Language of metadata: en
Metadata Point of Contact
Contact information for the individual or organization responsible for the metadata information.
Organization: State of Connecticut, Department of Environmental Protection
Person: Diana Danenberg
Phone: 860-424-3540
Fax: 860-424-4058
Email: dep.gisdata@ct.gov
Hours of service: Monday to Friday, 08:30 to 16:30 Eastern Standard Time
Address type: mailing and physical address
Address:
79 Elm Street
City: Hartford
State or Province: Connecticut
Postal code: 06106-5127
Country: USA
Metadata Standards
Description of the metadata standard used to document the data and reference to any additional extended profiles to the standard used by the metadata producer.
Standard name: FGDC Content Standards for Digital Geospatial Metadata
Standard version: FGDC-STD-001-1998
Time convention: local time
Metadata profiles defining additonal information:
Profile: ESRI Metadata Profile
FGDC Plus Metadata Stylesheet
Stylesheet: FGDC Plus Stylesheet
File name: FGDC Plus.xsl
Version: 2.2
Description: This metadata is displayed using the FGDC Plus Stylesheet, which is an XSL template that can be used with ArcGIS software to display metadata. It displays metadata elements defined in the Content Standard for Digital Geospatial Metadata (CSDGM) - aka FGDC Standard, the ESRI Profile of CSDGM, the Biological Data Profile of CSDGM, and the Shoreline Data Profile of CSDGM. CSDGM is the US Federal Metadata standard. The Federal Geographic Data Committee originally adopted the CSDGM in 1994 and revised it in 1998. According to Executive Order 12096 all Federal agencies are ordered to use this standard to document geospatial data created as of January, 1995. The standard is often referred to as the FGDC Metadata Standard and has been implemented beyond the federal level with State and local governments adopting the metadata standard as well. The Biological Data Profile broadens the application of the CSDGM so that it is more easily applied to biological data that are not explicitly geographic (laboratory results, field notes, specimen collections, research reports) but can be associated with a geographic location. Includes taxonomical vocabulary. The Shoreline Data Profile addresses variability in the definition and mapping of shorelines by providing a standardized set of terms and data elements required to support metadata for shoreline and coastal data sets. The FGDC Plus Stylesheet includes the Dublin Core Metadata Element Set. It supports W3C DOM compatible browsers such as IE7, IE6, Netscape 7, and Mozilla Firefox. It is in the public domain and may be freely used, modified, and redistributed. It is provided "AS-IS" without warranty or technical support.
Instructions: On the top of the page, click on the title of the dataset to toggle opening and closing of all metadata content sections or click section links listed horizontally below the title to open individual sections. Click on a section name (e.g. Description) to open and close section content. Within a section, click on a item name (Status, Key Words, etc.) to open and close individual content items. By default, the Citation information within the Description section is always open for display.
Download: FGDC Plus Stylesheet is available from the ArcScripts downloads at www.esri.com.