Connecticut 1990 Orthophoto

+ Resource Description

Citation

Information used to reference the data.

Title: Connecticut 1990 Orthophoto

Originators: State of Connecticut, Department of Environmental Protection (data publisher)

U.S. Geological Survey (original data compiler, editor and publisher)

Publisher: State of Connecticut, Department of Environmental Protection

Publication place: Hartford, Connecticut, 06106

Publication date: 20070402

Data type: SDE raster digital data

Data location: http://www.ct.gov/deep

Larger Work Citation

Title: 1990 Digital Orthophoto Quarter Quadrangles (DOQQ)

Originators: State of Connecticut, Department of Environmental Protection (data publisher)

U.S. Geological Survey (original data compiler, editor, and publisher)

Series name: USGS 3.75 Minute Digital Orthophoto Quarter Quadrangle (DOQQ

Series identification: USGS 3.75 Minute Digital Orthophoto Quarter Quadrangles (DOQQs) are othophotos that cover one quarter the area of a USGS 7.5 minute topographic quadrangle map.

Publisher: U.S. Geological Survey

Publication place: Reston, Virgina 22092, USA

Publication date: 1990

Data type: raster digital data

Data location: http://ct.gov/deep, http://www.usgs.gov

Description

A characterization of the data, including its intended use and limitations.

Abstract: Connecticut 1990 Orthophoto is a raster mosaic of 1990 orthophotography for Connecticut. It represents a mosaic of 414 digital orthophoto quarter quads (DOQQ) produced by the U.S. Geological Survey (USGS). The date of the orthophotography is 1990. The raster mosaic is based on DOQQs that are gray-scale, leaf-off, 1:12,000 scale (1 inch = 1,000 feet), quarter-quadrangle (3.75 minutes of latitude by 3.75 minutes of longitude) input raster images with 1-meter ground resolution. Input raster DOQQs are in Tagged Image File Format (TIFF) format and named "ortho_1990_quad0078se.tif" after CT DEP quadrangle number 78, SE quadrant, for example. Each 7.5 minute quadrangle is broken into four quadrants: NE, NW, SE, and SW. Each of these 3.75 minute quarter quadrangles is referred to as a quarter quad.

Orthophotos combine the image characteristics of a photograph with the geometric qualities of a map. The primary orthophoto produced by the USGS is the digital orthophoto quarter quadrangle (DOQQ), a 1-meter ground resolution, quarter-quadrangle (3.75 minutes of latitude by 3.75 minutes of longitude) image cast on the Universal Transverse Mercator projection (UTM) on the North American Datum of 1983 (NAD83). The geographic extent of the DOQQ is equivalent to a quarter-quadrangle plus the overedge ranges from a minimum of 50 meters to a maximum of 300 meters corner points. The overedge is included to facilitate tonal matching for mosaicking and for the placement of the NAD83 and secondary datum corner ticks. The normal orientation of data is by lines (rows) and samples (columns). Each line contains a series of pixels ordered from west to east with the order of the lines from north to south. The radiometric image brightness values are stored as 256 gray levels, ranging from 0 to 255.

Purpose: DOQs (or DOQQs) serve a variety of purposes, from interim maps to field references for Earth science investigations and analysis. The DOQ is useful as a layer of a geographic information system and as a tool for revision of USGS digital line graphs and topographic maps. A DOQ can be incorporated into any geographic information system (GIS) that can manipulate raster images. It can function as a cartographic base for displaying, generating, and modifying associated digital planimetric data. Other applications include vegetation and timber management, routing and habitat analysis, environmental impact assessments, emergency evacuation planning, flood analysis, soil erosion assessment, facility management, and ground-water and watershed analysis. The accuracy and detail provided by the DOQ allow users to evaluate their data for accuracy and completeness, make real-time modifications to their data, and create new spatial data.

Supplemental information: The Connecticut Department of Environmental Protection converted the 1990 DOQQs produced by the USGS from UTM (meters) to the Connecticut State Plane Coordinate System North American Datum of 1983 (NAD83). Map units are feet, not meters. These DOQQs are in Tagged Image File Format (TIFF) format and named ortho_1990_quadxxxxYY.tif, where xxxx is a 4 digit quadrangle number beginning at 0001 and YY identifies the quarter quadrange (ne, nw, se, sw). The Connecticut Department of Environmental Protection subsequently created a statewide mosaic of these 1990 DOQQs.

An orthophoto or orthophotograph is an aerial photograph that has been geometrically corrected ("orthorectified") such that the scale of the photograph is uniform, meaning that the photo can be considered equivalent to a map. Unlike an aerial photograph, an orthophotograph can be used to measure true distances, because it is an accurate representation of the earth's surface, having been adjusted for topographic relief, lens distortion, and camera tilt.

For additional specific information on the production of digital orthophoto quadrangles, refer to Standards for Digital Orthophotos (National Mapping Program Technical Instructions) published by the U.S. Department of Interior, U.S. Geological Survey, National Mapping Division.

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.ORTHO_1990

Data type: SDE raster digital data

Data format: SDE Raster Dataset

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.

Date: 1990

Currentness reference: ground condition

Status

The state of and maintenance information for the data.

Data status: In work

Update frequency: As needed

Key Words

Words or phrases that summarize certain aspects of the data.

Theme:

Keywords: biota, elevation, imageryBaseMapsEarthCover, inlandWaters, geoscientificInformation, oceans, society

Keyword thesaurus: ISO 19115 Topic Category

Theme:

Keywords: USGS, digital orthophoto quad, 1-Meter DOQ, DOQ, DOQQ, digital orthophoto quadrangle, digital orthophoto quarter quadrangle, orthophoto, orthophotography, orthoimage, orthoimagery, imagery, raster, geo-referenced raster image, aerial photo

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. No restrictions or legal prerequisites for accessing the data. The data is in the public domain and may be redistributed.

Use constraints: None. No restrictions or legal prerequisites for using the data after access is granted. The data is suitable for use at appropriate scale, and is not intended for maps printed at scales greater or more detailed than 1:12,000 scale (1 inch = 1,000 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 CT DEP and the USGS as the source for this information. For example, include the following data source description when printing this information on a map: 1990 Orthophotos - From USGS DOQQ. Source map scale is 1:12,000. Acknowledgement of the U.S. Geological Survey is appreciated in products derived from these data.

Data Security Information

Handling restrictions imposed on the data because of national security, privacy or other concerns.

Security classifiction system: None

Security classification: Unclassified

Security handling: No restrictions for handling the data.

+ Graphic Example

Browse Graphic

Graphic illustration of the data.

Browse graphic 1

Open - Full view of Connecticut 1990 Orthophoto

Browse graphic 2

Open - Detail view of Connecticut 1990 Color Orthophoto within vicinity of the University of Connecticut at Avery Point in Groton, Connecticut.

+ 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: row and column

Coordinate representation:

Abscissa resolution: 3.281512

Ordinate resolution: 3.281335

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

Boundary	Coordinate
Left	723965.538291 (survey feet)
Right	1274455.500722 (survey feet)
Top	949451.571377 (survey feet)
Bottom	539005.737706 (survey feet)

In Unprojected coordinates (geographic)

GCS North American 1983

Boundary	Coordinate
West	-73.766497 (longitude)
East	-71.739317 (longitude)
North	42.066805 (latitude)
South	40.936007 (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: Raster

Raster Information

Type and number of raster spatial objects in the data.

Raster format: SDR

Raster object type: Pixel

Number of raster bands: 1

Raster properties

Raster origin: Upper Left

Has pyramid layers: TRUE

Has image colormap: FALSE

Compression type: JPEG

Raster display type: pixel codes

Cell information

Number of cells on x-axis: 167755

Number of cells on y-axis: 125085

Number of cells on z-axis: 1

Bits per cell: 8

Cell Size:

X direction: 3.281512

Y direction: 3.281335

+ 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: All DOQ header data and image file sizes are validated by Tape Validation System (TVS) software prior to archiving in the Sales Data Base. This validation procedure assures correct physical format and field values for header record elements. Logical relationships between header record elements are tested.

Completeness report: All DOQ images are visually inspected for completeness to ensure that no gaps or image misplacement exists in the image area or in overedge coverage. The DOQ images may be derived by mosaicking multiple images, in order to insure complete coverage. All DOQs are cloud free. Some clouds may, very infrequently, be encountered only in the overedge coverage. Source photography is leaf-off in deciduous vegetation regions. Void areas may exist, having a radiometric value of zero and appearing black. These voids are areas for which no photographic source is available or are the result of image transformation from other planimetric systems to the UTM projection. In the latter case, the void sliver areas are on the outside edges of the overedge area. The data set field content of each DOQ header record element is validated to assure completeness prior to archiving in the Sales Data Base.

Cloud cover: 0

Attribute Accuracy

Accuracy of the identification of data entities, features and assignment of attribute values.

Attribute accuracy report: During photographic reproduction of the source photography, limited analog dodging is performed to improve image quality. Analog dodging consists of holding back light from certain areas of the sensitized photographic material to avoid overexposure. The diapositive is inspected to insure clarity and radiometric uniformity. Diapositive image brightness values are collected with a minimum of image quality manipulation. Image brightness values may deviate from brightness values of the original imagery due to image value interpolation during the scanning and rectification processes. Radiometry is verified by visually inspecting the DOQs to the original unrectified image to determine if the DOQ has the same image quality or better image quality than the original unrectified input image. Slight systematic and radiometric differences can be detected between adjacent DOQ files due primarily to differences in source photography capture dates and Sun angles of aerial photography along flight lines. These differences can be observed in an image's general lightness or darkness when compared to adjacent DOQ file coverages.

Attribute accuracy assessment:

Accuracy values

7.0 meters RMSE

Explanation: The DOQ root-mean-square-error (RMSE) is the square root of the average of the squared discrepancies. These discrepancies are the differences in coordinate (x and y) values derived by comparing the data being tested with values determined during aerotriangulation or by an independent survey of higher accuracy.

Positional Accuracy

Accuracy of the positional aspects of the data.

Horizontal accuracy report: The DOQ horizontal positional accuracy and the assurance of that accuracy depend, in part, on the accuracy of the data inputs to the rectification process. These inputs consist of the digital elevation model (DEM), aerotriangulation control and methods, the photo source camera calibration, scanner calibration, and aerial photographs that meet National Aerial Photography Program (NAPP) standards. Field control is acquired by third order class 1 or better survey methods sufficiently spaced to meet National Map Accuracy Standards for 1:12,000-scale (1 inch = 1,000 feet) products. Aerial cameras have current certification from the USGS, National Mapping Division, Optical Science Laboratory. Test calibration scans are performed on all source photography scanners.

Horizontal positional accuracy is determined by the Orthophoto Accuracy (ORACC) software program for DOQ data produced by the National Mapping Division. The program determines the accuracy by finding the line and sample coordinates of the passpoints in the DOQ and fitting these to their ground coordinates to develop a root mean square error (RMSE). From 4 to 9 points are checked. As a further accuracy test, the image line and sample coordinates of the DEM corners are transformed and compared with the actual X,Y DEM corner values to determine if they are within the RMSE. Additional information on this testing procedure can be found in U.S. Department of the Interior, U.S. Geological Survey, 1993, Technical Instructions, ORACC Users Manual (draft): Reston, VA. Adjacent DOQ's, when displayed together in a common planimetric coordinate system, may exhibit slight positional discrepancies across common DOQ boundaries. Linear features, such as streets, may not be continuous. These edge mismatches, however, still conform to positional horizontal accuracy within the NMAS.

Field investigations to validate DOQ positional accuracy reliabilty are periodically conducted by the USGS, National Mapping Division, Geometronics Standards Section. DOQ's produced by cooperators and contractors use similarly approved RMSE test procedures.

Horizontal positional accuracy assessment:

Accuracy values

Explanation: All of the DOQs meet National Map Accuracy Standards (NMAS) at the 1:12,000 scale. These standards specify that 90 percent of all well-defined points in the DOQs tested for positional accuracy must fall within 10 meters of their actual location on the ground. The USGS has verified and accepted these datasets.

Vertical accuracy report: The vertical accuracy of the verified USGS format DEM is equivalent to or better than a USGS level-1 or -2 DEM.

+ Data Source and Process Information

Data Sources

Information about the source data used to construct or derive the data.

Data source information

DOQQ

Title: 1990 Digital Orthophoto Quarter Quad DOQQ - UTM

Originators: U.S. Geological Survey (original data compiler, editor and publisher)

Series name: USGS Digital Orthophoto Quarter Quadrangles

Publisher: U.S. Geological Suvey

Publication place: Reston, Virgina 22092, USA

Publication date: 1990

Data type: remote-sensing image

Data location: http://www.usgs.gov

Map scale denominator: 12000

Media: disc

Source contribution: 1990 DOQQs for Connecticut produced by the USGS are gray-scale images with 1-meter ground resolution, UTM (NAD83). Image files are in Tagged Image File Format (TIFF) format.

Date: 1990

Currentness reference: ground condition

DOQQ Conn State Plane

Title: 1990 Digital Orthophoto Quarter Quad DOQQ - Conn State Plane

Originators: State of Connecticut, Department of Environmental Protection (data publisher)

U.S. Geological Survey (original data compiler, editor and publisher)

Publication date: 1990

Data type: remote-sensing image

Data location: http://www.ct.gov/deep

Map scale denominator: 12000

Media: disc

Source contribution: These are copies of the 1990 DOQQs for Connecticut published by the USGS that have been converted to the Connecticut State Plane Coordinate System, North American Datum of 1983 (NAD83). Map units are feet, not meters. Image files are in Tagged Image File Format (TIFF) format and named ortho_1990_quadxxxxYY.tif, where xxxx is a 4 digit quadrangle number beginning at 0001 and YY identifies the quadrangle quadrange (ne, nw, se, sw). For example, the 4 DOQQs for the Hartford North CT quadrangle (quad 37) are ortho_1990_quad0037ne.tif (quad 37 northeast), ortho_1990_quad0037nw.tif (quad 37 northwest), ortho_1990_quad0037se.tif (quad 37 southeast), and ortho_1990_quad0037sw.tif (quad 37 southwest).

Date: 1990

Currentness reference: ground condition

ORTHOPHOTOMOSAIC

Title: Connecticut 1990 Orthophoto Mosaic

Originators: State of Connecticut, Department of Environmental Protection

Publisher: State of Connecticut, Department of Environmental Protection

Publication place: Hartford, Connecticut

Publication date: 20070402

Data type: raster digital data

Data location: http://www.ct.gov/deep

Map scale denominator: 12000

Media: disc

Source contribution: Statewide raster mosaic of all DOQQ Conn State Plane input rasters. The raster mosaic is in the Connecticut State Plane Coordinate System, North American Datum of 1983 (NAD83).

Date: 1990

Currentness reference: ground condition

Process Steps

Information about events, parameters, tolerances and techniques applied to construct or derive the data.

Process step information

Process Step 1

Process description: Primarily using ESRI ArcInfo 7 software, the Connecticut Department of Environmental Protection converted the DOQQs published by the USGS from UTM (meters) to the Connecticut State Plane Coordinate System North American Datum of 1983 (NAD83). Map units are feet, not meters. These DOQQs are in Tagged Image File Format (TIFF) format and named ortho_1990_quadxxxxYY.tif, where xxxx is a 4 digit quadrangle number beginning at 0001 and YY identifies the quarter quadrange (ne, nw, se, sw).

Organization: State of Connecticut, Department of Environmental Protection

Person: Deborah Dumin

Phone: 860-424-3540

Address type: mailing and physical address

Address: 79 Elm Street

City: Hartford

State or Province: Connecticut

Postal code: 06106

Country: USA

Process date: 1999

Process software and version: ArcInfo 7

Data Source used

DOQQ

Title: 1990 Digital Orthophoto Quarter Quad DOQQ - UTM

Originators: U.S. Geological Survey (original data compiler, editor and publisher)

Series name: USGS Digital Orthophoto Quarter Quadrangles

Publisher: U.S. Geological Suvey

Publication place: Reston, Virgina 22092, USA

Publication date: 1990

Data type: remote-sensing image

Data location: http://www.usgs.gov

Map scale denominator: 12000

Media: disc

Source contribution: 1990 DOQQs for Connecticut produced by the USGS are gray-scale images with 1-meter ground resolution, UTM (NAD83). Image files are in Tagged Image File Format (TIFF) format.

Date: 1990

Currentness reference: ground condition

Data Source produced

DOQQ Conn State Plane

Title: 1990 Digital Orthophoto Quarter Quad DOQQ - Conn State Plane

Originators: State of Connecticut, Department of Environmental Protection (data publisher)

U.S. Geological Survey (original data compiler, editor and publisher)

Publication date: 1990

Data type: remote-sensing image

Data location: http://www.ct.gov/deep

Map scale denominator: 12000

Media: disc

Date: 1990

Currentness reference: ground condition

Process Step 2

Process description: Using ESRI ArcGIS 9.2 software, an empty raster dataset was created and subequently populated with input rasters to create a statewide raster mosaic.

STEP 1 - Create Raster Dataset - The Coordinate System for the raster dataset is NAD_1983_StatePlane_Connecticut_FIPS_0600_Feet. The image compression type is JPEG with a compression quality of 90. The Pyramid Reference Point X and Y coordinate are 687800 and 1015180, respectively. Pyramids: 8 Bilinear.

CreateRasterDataset "Database Connections\depdbs11_depraster_DEP_DirectConnect.sde" ORTHO_1990 # 8_BIT_UNSIGNED PROJCS['NAD_1983_StatePlane_Connecticut_FIPS_0600_Feet',

GEOGCS['GCS_North_American_1983',

DATUM['D_North_American_1983',

SPHEROID['GRS_1980',6378137.0,298.257222101]],

PRIMEM['Greenwich',0.0],

UNIT['Degree',0.0174532925199433]],

PROJECTION['Lambert_Conformal_Conic'],

PARAMETER['False_Easting',999999.999996],

PARAMETER['False_Northing',499999.999998],

PARAMETER['Central_Meridian',-72.75],

PARAMETER['Standard_Parallel_1',41.2],

PARAMETER['Standard_Parallel_2',41.86666666666667],

PARAMETER['Latitude_Of_Origin',40.83333333333334],

UNIT['Foot_US',0.3048006096012192]]

1 DEPRASTER "PYRAMIDS 8 BILINEAR" "128 128" "JPEG 90" "687800 1015180" "Database Connections\depdbs11_depraster_DEP_DirectConnect.sde\depgisraster.DEP.ORTHO_1990"

STEP 2 - Mosaic 414 DOQQ input rasters. The Mosaicking Tolerance value was set to 0.2. Consequently, pixel values in the raster mosaic resulted from a resampling of pixels values from individual input rasters when the difference in alignment between input and mosaic (target) pixels exceeded 0.2 pixel width. If the alignment difference is less than 0.2 pixel width, an input pixel value is assigned to the nearby target pixel, and a shift is performed instead of resampling all target pixels. Below is an example usage of the ESRI Geoprocessing Mosaic command and arguments used to mosaic 4 quarter quadrangle input rasters for USGS quadrangle No 50.

Mosaic :\tif_format\ortho_1990_quad0050ne.tif;

Z:\tif_format\ortho_1990_quad0050nw.tif;

Z:\tif_format\qortho_1990_quad0050se.tif;

Z:\tif_format\ortho_1990_quad0050sw.tif

"Database Connections\depdbs11_depraster_DEP_DirectConnect.sde\DEPGISRASTER.DEP.ORTHO_1990"

LAST FIRST # # NONE 0.2

"Database Connections\depdbs11_depraster_DEP_DirectConnect.sde\DEPGISRASTER.DEP.ORTHO_1990"

Organization: State of Connecticut, Department of Environmental Protectino

Person: Howie Sternberg

Phone: 860-424-3540

Fax: 860-424-4058

Address type: mailing and physical address

Address: 79 Elm Street

City: Hartford

State or Province: Connecticut

Postal code: 06106

Country: USA

Process date: 20070402

Process software and version: ArcGIS 9.2

Data Source used

DOQQ Conn State Plane

Title: 1990 Digital Orthophoto Quarter Quad DOQQ - Conn State Plane

Originators: State of Connecticut, Department of Environmental Protection (data publisher)

U.S. Geological Survey (original data compiler, editor and publisher)

Publication date: 1990

Data type: remote-sensing image

Data location: http://www.ct.gov/deep

Map scale denominator: 12000

Media: disc

Date: 1990

Currentness reference: ground condition

Data Source produced

ORTHOPHOTOMOSAIC

Title: Connecticut 1990 Orthophoto Mosaic

Originators: State of Connecticut, Department of Environmental Protection

Publisher: State of Connecticut, Department of Environmental Protection

Publication place: Hartford, Connecticut

Publication date: 20070402

Data type: raster digital data

Data location: http://www.ct.gov/deep

Map scale denominator: 12000

Media: disc

Date: 1990

Currentness reference: ground condition

+ 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 1990 Orthophoto

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 Enviromental 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: Raster Dataset

Format version number: ArcGIS

Digital transfer option:

Offline option:

Offline media: disc

Fees: An offline 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: 20111227

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: 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

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: Unclassified

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

Online linkage: http://www.esri.com/metadata/esriprof80.html

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.