Connecticut 2 ft Contours (Revised)
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Connecticut 2 ft Contours (Revised)
SDE Feature Class - depgis.DEP.CONTOUR_2000_2FT
FGDC, ESRI Metadata
DescriptionGraphicSpatialData StructureData QualityData SourceData DistributionMetadata
+ Resource Description
Citation
Information used to reference the data.
Title: Connecticut 2 ft Contours (Revised)
Originators: State of Connecticut, Department of Environmental Protection (editor and publisher)
University of Connecticut, College of Agriculture and Natural Resources (compiler and editor)
State of Connecticut, Department of Public Safety
State of Connecticut, Department of Transportation
Connecticut Joint Highway Research Council
Publisher: State of Connecticut, Department of Environmental Protection
Publication place: Hartford, Connecticut, USA
Publication date: 20110502
Data type: vector digital data
Data location: http://www.ct.gov/deep
Description
A characterization of the data, including its intended use and limitations.
Abstract:
Connecticut 2 ft Contours (Revised) is line feature-based data representing ground elevation at 2 foot intervals for the state of Connecticut. This data replaces the 2 ft contour data previously available from CT DEP. It has fewer errors and data gaps than the previously available contours; however, some inaccuracies remain. These contour lines have been processed to appear smoother and less jagged than the previous data and have been optimized for faster drawing and performance. The source for these data is the Connecticut LiDAR 10-foot DEM (file name: ct_lidar) from the Center for Land Use Education and Research at the University of Connecticut, College of Agriculture and Natural Resources.
Purpose:
Connecticut 2 ft Contours (Revised)  is used to depict ground elevation at 2 foot intervals or greater. Each contour line represents a line of equal elevation and indicates surface relief when used with other information such as aerial photography, soils, geology, or hydrography.
Dataset credit:
Aero-Metric, Inc. of Sheboygan, Wisconsin was contracted by the State of Connecticut to provide the 2004 Statewide Aerial Survey of Connecticut. Contract deliverables include digital orthohotos, two sets of non-rectified prints for stereoscopic viewing, photo indexes, and LiDAR data. All 2004 Statewide Aerial Survey imagery and data products are defined under State of Connecticut contract award number RFP-990-A-14-0518-C (dated Feb 22, 2000), including contract award supplement #1 (dated Feb 28, 2002), contract award supplement #2 (dated Nov 4, 2004), contract award supplement #3 (dated Nov 26, 2004) and contract award supplement #4 (dated May 13, 2005). TerraPoint LLC of Woodlands Texas was subcontracted to create a Connecticut Statewide LIDAR dataset. 

The  University of Connecticut, College of Agriculture and Natural Resources subsequently created and made accessible a variety of LiDAR-derived datasets. One of these, the Connecticut LiDAR 10-foot DEM (file name: ct_lidar), was used to create the smoothed statewide DEM from which this revised contour line feature class was created.
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: CT
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.CONTOUR_2000_2FT
Data type: vector digital data
Data format: SDE Feature Class
Native dataset environment: Microsoft Windows 2000 Version 5.2 (Build 3790) Service Pack 2; ESRI ArcCatalog 9.2.6.1500
Time Period of Data
Time period(s) for which the data corresponds to the currentness reference.
Date: 2000
Currentness reference:
ground condition
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: LiDAR, contours
Keyword thesaurus: none
Theme:
Keywords: elevation, environment
Keyword thesaurus: ISO 19115 Topic Cateogry
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. No restrictions or legal prerequisites for accessing the data. The data is in the public domain and may be redistributed.
Use constraints:
The data is suitable for use at appropriate scale; however, these data are not consistently accurate statewide. Users should review the following description of source data and process steps in order to determine the appropriate uses of this information. 

The original data source was 20-foot posting LiDAR point data collected in 2000, which has a horizontal positional accuracy of approximately 3 feet on the ground. The LiDAR point data has known limitations including data gaps. While the contour lines previously available from CT DEP were derived directly from the LiDAR point data, these contour lines were derived from the Connecticut LiDAR 10-foot DEM (file name: ct_lidar)  from the Center for Land Use Education  and Research (CLEAR) at the University of Connecticut, College of Agriculture and Natural Resources. During the production of the Connecticut LiDAR 10-foot DEM, CLEAR manually edited the data to fill in data gaps with coarser data based on contour lines from USGS topographic maps. Therefore, these contour lines contain fewer errors than the previously available contour lines.

In order to produce less jagged contour lines, a circular averaging filter with a radius of 3 cells was applied to the Connecticut LiDAR 10-foot DEM (file name: ct_lidar). The contour lines were produced from this smoothed DEM. Visual inspection has shown that the resulting contour lines align well with the contour lines previously available from CT DEP.

These contour lines, while less error-prone than the previous data, retain some errors from the LiDAR point data and may have other errors introduced during the editing and processing steps. Contour lines may not conform well to the shoreline of waterbodies and in many instances erroneously extend into areas of water. Due to these anomalies, use caution when viewing and analyzing this information.

There are no restrictions or legal prerequisites for using the data after access is granted. 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 Conneticut, 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 these data on a map or using it in a software application, analysis, or report, please acknowledge the State of Connecticut as the source for this information.
Data Security Information
Handling restrictions imposed on the data because of national security, privacy or other concerns.
Security classifiction system: None
Security classification: None
Security handling: No restrictions for handling the data
+ Graphic Example
Browse Graphic
Graphic illustration of the data.
Browse graphic 1
Open - Full view of the 100 ft contours. This image is included to show the coverage area of the 2 ft contours, which is the same area as for the 100 ft contours.
Graphic Image

Browse graphic 2
Open - Detail view of the 2 ft contours.
Graphic Image

Browse graphic 3
Open - A data gap in the contour lines previously available from DEP
Graphic Image

Browse graphic 4
Open - The revised contour lines, in the same area where there was previously a data gap
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: 0.000328
Ordinate resolution: 0.000328
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 datum name: North American Vertical Datum of 1988
Altitude resolution: 1.000000
Altitude distance units: feet
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
Left730315.000070 (survey feet)
Right1263285.000198 (survey feet)
Top944475.000039 (survey feet)
Bottom554864.999936 (survey feet)
In Unprojected coordinates (geographic)
GCS North American 1983
BoundaryCoordinate
West-73.742906 (longitude)
East-71.780655 (longitude)
North42.053150 (latitude)
South40.979730 (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.
Entity and attribute overview:
Includes 2 foot ground elevation contour line features. Information encoded about these features includes an ELEV_FT attribute and attributes for selection and cartographic symbology classification. Use the INT_FT attribute to select and symbolize features on a map. Use the LABEL_2, LABEL_10, and LABEL_20 attribute fields to label elevation values on a map.
Direct spatial reference method: Vector
Attributes of Connecticut 2 ft Contours (Revised)
Detailed descriptions of entity type, attributes, and attribute values for the data.
Name: depgis.DEP.CONTOUR_2000_2FT
Type of object: Feature Class
Geometry type: Polyline
Number of records: 1749467
Description:
2 ft ground elevation contours represented as line features
Source:
State of Connecticut, Department of Environmental Protection
Attributes
OBJECTID
Definition:
Internal feature number.
Alias: OBJECTID Type: OID Width: 4 Precision: 0 Scale: 0
Attribute values: Sequential unique whole numbers that are automatically generated.
Attribute definition source:
ESRI
Shape
Definition:
Feature geometry.
Alias: SHAPE Type: Geometry Width: 0 Precision: 0 Scale: 0
Attribute values: Coordinates defining the features.
Attribute definition source:
ESRI
ELEV_FT
Definition:
Elevation of contour feature in feet
Alias: ELEV_FT Type: Double Width: 8 Precision: 0 Scale: 0
Attribute domain range
RangeValue
Minimum2
Maximum2412
Attribute definition source:
Terrapoint LLC / University of Connecticut, College of Agriculture and Natural Resources
INT_FT
Definition:
The contour line interval in feet. This is based on the value of ELEV_FT. These values are used for querying subsets and classifying features for symbology purposes.
Alias: INT_FT Type: SmallInteger Width: 2 Precision: 0 Scale: 0
Attribute domain values
ValueDefinition
2
2 foot contour interval
Attribute domain values
ValueDefinition
10
10 foot contour interval
Attribute domain values
ValueDefinition
20
20 foot contour interval
Attribute definition source:
State of Connecticut, Department of Environmental Protection
LABEL_2
Definition:
2 foot contour label field. Used to label all contour lines with an elevation value evenly divisible by 2.
Alias: LABEL_2 Type: SmallInteger Width: 2 Precision: 0 Scale: 0
Attribute domain range
RangeValue
Minimum2
Maximum2412
Attribute definition source:
State of Connecticut, Department of Environmental Protection
LABEL_10
Definition:
10 foot contour label field. Used to label all contour lines with an elevation value evenly divisible by 10.
Alias: LABEL_10 Type: SmallInteger Width: 2 Precision: 0 Scale: 0
Attribute domain range
RangeValue
Minimum10
Maximum2410
Attribute definition source:
State of Connecticut, Department of Environmental Protection
LABEL_20
Definition:
20 foot contour label field. Used to label all contour lines with an elevation value evenly divisible by 20.
Alias: LABEL_20 Type: SmallInteger Width: 2 Precision: 0 Scale: 0
Attribute domain range
RangeValue
Minimum20
Maximum2400
Attribute definition source:
State of Connecticut, Department of Environmental Protection
QUAD_NAME
Definition:
Name assigned to USGS quadrangles that cover Connecticut.
Alias: QUAD_NAME Type: String Width: 50 Precision: 0 Scale: 0
Attribute values: USGS-assigned name
Attribute definition source:
State of Connecticut, Department of Environmental Protection
SHAPE
Definition:
Feature geometry.
Alias: SHAPE Type: Geometry Width: 4 Precision: 0 Scale: 0
Attribute values: Coordinates defining the features.
Attribute definition source:
ESRI
QUAD_NO
Definition:
Number assigned to USGS quadrangles that cover Connecticut
Alias: QUAD_NO Type: SmallInteger Width: 2 Precision: 0 Scale: 0
Attribute values: Integer
Attribute definition source:
State of Connecticut, Department of Environmental Protection
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.CONTOUR_2000_2FT
ESRI feature type: Simple
Geometry type: Polyline
Topology: FALSE
Feature count: 1749467
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.CONTOUR_2000_2FT
Type: String
Count: 1749467
+ 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:
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 not performed by CT DEP. No automated procedures or tests were performed by CT DEP to guarantee desired topology other than limited visual inspection.
Completeness report:
The completeness of the data reflects the content of the data sources, which consists of the Connecticut LiDAR 10-foot DEM (file name: ct_lidar) and its sources, the LiDAR 2000 elevation points and USGS topograhic maps. This data contains automatically generated contour lines that may contain errors or inconsistencies inherent in the automated process. The data also contains errors or inconsistencies related to errors inherent in the original LiDAR elevation data capture. There are no plans to update or correct these data.
Attribute Accuracy
Accuracy of the identification of data entities, features and assignment of attribute values.
Attribute accuracy report:
Connecticut 2 ft Contours (Revised) retains the feature types and information identified by the State of Connecticut, Department of Environmental Protection and derived from the Connecticut LiDAR 10-foot DEM. All attributes have valid values. Values are within defined domains. ELEV_FT attribute values are derived from the Connecticut LiDAR Smoothed DEM. Attribute INT_FT was populated through successive selections of ELEV_FT values based on calculations to select values for 2, 10, and 20 foot intervals. Attributes for LABEL_2, LABEL_10, and LABEL_20 were populated through calculations. Attributes QUAD_NO and QUAD_NAME were populated by assigning the number and name of the USGS quadrangle that the contours are located within.
Positional Accuracy
Accuracy of the positional aspects of the data.
Horizontal accuracy report:
The horizontal positional accuracy of this data is not known. Users should review the following description of source data and process steps in order to determine the appropriate uses of this information. 

The original data source was 20-foot posting LiDAR point data collected in 2000, which has a horizontal positional accuracy of approximately 3 feet on the ground. The LiDAR point data has known limitations including data gaps. While the contour lines previously available from CT DEP were derived directly from the LiDAR point data, these contour lines were derived from the Connecticut LiDAR 10-foot DEM (file name: ct_lidar)  from the Center for Land Use Education  and Research (CLEAR) at the University of Connecticut, College of Agriculture and Natural Resources. During the production of the Connecticut LiDAR 10-foot DEM, CLEAR manually edited the data to fill in data gaps with coarser data based on contour lines from USGS topographic maps. Therefore, these contour lines contain fewer errors than the previously available contour lines.

In order to produce less jagged contour lines, a circular averaging filter with a radius of 3 cells was applied to the Connecticut LiDAR 10-foot DEM (file name: ct_lidar). The contour lines were produced from this smoothed DEM. Visual inspection has shown that the resulting contour lines align well with the contour lines previously available from CT DEP.

These contour lines, while less error-prone than the previous data, retain some errors from the LiDAR point data and may have other errors introduced during the editing and processing steps. Contour lines may not conform well to the shoreline of waterbodies and in many instances erroneously extend into areas of water. Due to these anomalies, use caution when viewing and analyzing this information.
Vertical accuracy report:
The data is not consistently accurate statewide. These contour lines, while less error-prone than the previous data, retain some errors from the LiDAR point data and may have other errors introduced during the editing and processing steps. Contour lines may not conform well to the shoreline of waterbodies and in many instances erroneously extend into areas of water. Due to these anomalies, use caution when viewing and analyzing this information.
+ Data Source and Process Information
Data Sources
Information about the source data used to construct or derive the data.
Data source information
10-foot DEM
Title: Connecticut LiDAR 10-foot DEM (file name: ct_lidar)
Originators: University of Connecticut, College of Agriculture and Natural Resources
Publisher: University of Connecticut, Center for Land Use Education and Research (CLEAR)
Publication place: Storrs, Connecticut, USA
Publication date: Unknown
Data location: http://clear.uconn.edu
Media: disc
Source contribution:
This statewide digital elevation model (DEM) was generated by the Center for Land Use Education and Research (CLEAR), University of Connecticut using the 2000 Connecticut LiDAR point dataset, which consists of bare-earth x, y, and z point data derived from an Airborne LIDAR Topographic Mapping System (ALTMS). The x, y, and z values are stored in space-delimited ASCII files. These LiDAR elevation data are at a nominal 20-foot posting. 

To improve the DEM, CLEAR manually edited the 2000 Connecticut LiDAR point dataset to erase erroneous data and fill in data gaps with added points derived from contour lines that appear on USGS 1:24,000-scale Digital Raster Graphics (DRGs).
Date: 2000
Currentness reference:
ground condition
USGS Quad Index
Title: Connecticut USGS 7.5 Minute Quadrangle Index
Originators: State of Connecticut, Department of Environmental Protection
Publisher: State of Connecticut, Department of Environmental Protection
Publication place: Hartford, Connecticut, USA
Publication date: 1985
Edition: 2005
Data location: http://www.ct.gov/deep
Map scale denominator: 24000
Media: disc
Source contribution:
This data source contains the USGS quadrangles that cover the state of Connecticut. It was used to divide the contour lines into more evenly distributed shape lengths and to add attribute information.
Date: 2005
Currentness reference:
publication date
Smoothed DEM
Title: Connecticut LiDAR Smoothed DEM (file name: ct_dem_smooth)
Originators: State of Connecticut, Department of Environmental Protection
Publication date: Unpublished Material
Media: computer program
Source contribution:
This data source is a smoothed version of the Connecticut LiDAR 10-foot DEM. The smoothing was performed using the ArcGIS Spatial Analyst extension to calculate a focal mean using a circular neighborhood with a radius of 3 cells.
Date: 2000
Currentness reference:
ground condition
Waterbodies
Title: Connecticut Waterbody Polygon
Originators: U.S. Geological Survey, National Mapping Program
Publisher: State of Connecticut, Department of Environmental Protection
Publication place: Hartford, Connecticut, USA
Publication date: 1999
Data location: http://www.ct.gov/deep
Map scale denominator: 24000
Media: disc
Source contribution:
The Connecticut Waterbody Polygon layer was used to sytematically select and remove contour lines that were contained completely within waterbody polygons.
Date: 1999
Currentness reference:
publication date
Process Steps
Information about events, parameters, tolerances and techniques applied to construct or derive the data.
Process step information
Process Step 1
Process description:
Pre-processing the DEM: The Connecticut LiDAR 10-foot DEM was smoothed using the focal statistics tool in the ArcGIS Spatial Analyst extension. A circular neighborhood with a radius of 3 cells was used, and the statistic calculated was the mean.
Organization: State of Connecticut, Department of Environmental Protection
Person: Courtney Larson
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: CT
Postal code: 06106-5127
Country: USA
Process date: 20110401
Data Source used
10-foot DEM
Title: Connecticut LiDAR 10-foot DEM (file name: ct_lidar)
Originators: University of Connecticut, College of Agriculture and Natural Resources
Publisher: University of Connecticut, Center for Land Use Education and Research (CLEAR)
Publication place: Storrs, Connecticut, USA
Publication date: Unknown
Data location: http://clear.uconn.edu
Media: disc
Source contribution:
This statewide digital elevation model (DEM) was generated by the Center for Land Use Education and Research (CLEAR), University of Connecticut using the 2000 Connecticut LiDAR point dataset, which consists of bare-earth x, y, and z point data derived from an Airborne LIDAR Topographic Mapping System (ALTMS). The x, y, and z values are stored in space-delimited ASCII files. These LiDAR elevation data are at a nominal 20-foot posting. 

To improve the DEM, CLEAR manually edited the 2000 Connecticut LiDAR point dataset to erase erroneous data and fill in data gaps with added points derived from contour lines that appear on USGS 1:24,000-scale Digital Raster Graphics (DRGs).
Date: 2000
Currentness reference:
ground condition
Data Source produced
Smoothed DEM
Title: Connecticut LiDAR Smoothed DEM (file name: ct_dem_smooth)
Originators: State of Connecticut, Department of Environmental Protection
Publication date: Unpublished Material
Media: computer program
Source contribution:
This data source is a smoothed version of the Connecticut LiDAR 10-foot DEM. The smoothing was performed using the ArcGIS Spatial Analyst extension to calculate a focal mean using a circular neighborhood with a radius of 3 cells.
Date: 2000
Currentness reference:
ground condition
Process Step 2
Process description:
Generate contours: The ArcGIS 3D Analyst extension was used to create ten contour feature classes from the smoothed DEM at 20-foot intervals, using a different base contour value for each. The base contour values were 0, 2, 4, 6, 8, 10, 12, 14, 16, and 18. The first feature class has a base contour value of 0 and contains the contour values 20, 40, 60, etc; the second feature class has a base contour value of 2 and contains contour values 2, 22, 42, etc; and so forth. The process was done in this way after attempts to produce 2 foot contours for the entire state failed because there was insufficient processing capacity to generate them all at once.
Organization: State of Connecticut, Department of Environmental Protection
Person: Courtney Larson
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: CT
Postal code: 06106-5127
Country: USA
Process date: 20110401
Data Source used
Smoothed DEM
Title: Connecticut LiDAR Smoothed DEM (file name: ct_dem_smooth)
Originators: State of Connecticut, Department of Environmental Protection
Publication date: Unpublished Material
Media: computer program
Source contribution:
This data source is a smoothed version of the Connecticut LiDAR 10-foot DEM. The smoothing was performed using the ArcGIS Spatial Analyst extension to calculate a focal mean using a circular neighborhood with a radius of 3 cells.
Date: 2000
Currentness reference:
ground condition
Data Source produced
Ten 20-ft contour layers
Process Step 3
Process description:
Optimize contours: The line features were simplified by removing redundant vertices using the Simplify Line tool in ArcGIS. For the 2 foot contours, the maximum allowable offset was set to 2 feet. In testing, this offset value improved the performance of the feature class without making a significant visual difference when viewed at an appropriate scale.
Organization: State of Connecticut, Department of Environmental Protection
Person: Courtney Larson
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: CT
Postal code: 06106-5127
Country: USA
Process date: 20110401
Data Source used
Ten 20-ft contour layers
Data Source produced
Ten 20-ft contour layers
Process Step 4
Process description:
Clean up records: Self-intersecting line features with a shape length of less than 25 feet were sytematically selected and removed. These features were circular contours so small they appeared almost as points when viewed at an appropriate scale. Therefore, they were determined to be too small to provide meaningful information. Subsequently, features that were completely within a waterbody polygon were sytematically selected and removed.
Organization: State of Connecticut, Department of Environmental Protection
Person: Courtney Larson
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: CT
Postal code: 06106-5127
Country: USA
Process date: 20110401
Data Source used
Ten 20-ft contour layers
Data Source produced
Ten 20-ft contour layers
Process Step 5
Process description:
Edit attributes: The ArcGIS Identity tool was used to add USGS quadrangle attributes and to break up features into more uniform lengths for drawing and labeling performance purposes. The ID attribute was removed as it did not contain meaningful information. The Contour field was renamed ELEV_FT. The INT_FT attribute was added to classify the contour lines with elevation value ranges useful for symbolizing or selection of features. Label fields were added to assist with labeling at different intervals.
Organization: State of Connecticut, Department of Environmental Protection
Person: Courtney Larson
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
Process date: 20110401
Data Source used
Ten 20-ft contour layers
Data Source produced
Ten 20-ft contour layers
Process Step 6
Process description:
Merge contours: the ten 20-ft contour layers (with base contour values of 0, 2, 4, 6, 8, 10, 12, 14, 16, and 18) were merged together to create a statewide 2 foot contour layer.
Process date: 20110401
Data Source used
Ten 20-ft contour layers
Data Source produced
Connecticut 2 Foot Contours (Revised)
ESRI geoprocessing history
Description of ESRI geoprocessing commands, settings, and tolerances applied to the data.
ESRI geoprocessing command information
1 CopyFeatures_2
Date: 20110502 Time: 112730
Tool location: C:\Program Files\ArcGIS\ArcToolbox\Toolboxes\Data Management Tools.tbx\CopyFeatures
Command issued: CopyFeatures Y:\Workspaces\GIS_Staging\Elevation\CONTOURS_2000_92.gdb\CONTOUR_2000_2FT "Database Connections\10.18.8.60.depgis@dep_92dc.sde\depgis.DEP.CONTOUR_2000_2FT" 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 2 ft Contours (Revised)
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 sytem (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: CT
Postal code: 06106-5127
Country: USA
Standard Order Process
Common ways in which data may be obtained.
Digital form:
Format name: File Geodatabase
Format version number: ArcGIS 10
File decompression technique: no compression applied
Digital transfer option:
Online option:
Computer information:
Network address:
Network resource name: http://www.ct.gov/deep
Fees: A 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: 20111207
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: Courtney Larson
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: CT
Postal code: 06106-5127
Country: USA
Metadata Access Constraints
Restrictions and legal prerequisites for accessing or using the data after access is granted.
Access constraints:
None. No restrictions or legal prerequisites for accessing the metadata.
Use constraints:
None. No restrictions or legal prerequisites for using the metadata after access is granted.
Metadata Security Information
Handling restrictions imposed on the metadata because of national security, privacy or other concerns.
Security classifiction system: None
Security classification: None
Security handling: No restrictions for handling the metadata.
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
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.