Connecticut 2004 Orthophoto Center Point Index

Metadata also available as

Metadata:

Identification_Information:
Citation:
Citation_Information:
Originator:
State of Connecticut, Department of Environmental Protection,State of Connecticut, Department of Transportation
Publication_Date: 20140514
Title: Connecticut 2004 Orthophoto Center Point Index
Publication_Information:
Publication_Place: Storrs, CT
Publisher:
University of Connecticut Libraries Map and Geographic Information Center (MAGIC)
Online_Linkage:
<http://magic.lib.uconn.edu/magic_2/vector/37800/apindex_37800_0000_2004_s2_CTDEP_1_shp.zip>
Description:
Abstract:
Connecticut 2004 Orthophoto Center Point Index is comprised of point features centered on each 2004 digital orthophoto tile for Connecticut. There are 3,413 orthophoto tile center point features. The 2004 orthophoto data for Connecticut is comprised of 3,413 orthophoto tiles. Each tile measures approximately 1.17 miles east-west by 1.5 miles north-south, covering a geographic area of approximately 1.755 square miles. The 2004 digital orthophotos are organized in a regular grid pattern with 36 orthophoto tiles per 7.5 minute quadrangle area or 9 per 3.75 minute quarter quadrangle area. The overlap between adjacent photos is approximately 350 to 450 feet. Each center point feature is identified by a unique ORTHOPHOTO_TILE value, which matches the filename of the corresponding digital orthophoto tile.
Purpose:
These data define the center point location of each 2004 digital orthophoto tile for Connecticut. Use it to determine the name of orthophoto image file for a particular tile.
Supplemental_Information:
A digital orthophoto is a digital image of an aerial photograph in which displacements caused by the camera and the terrain have been removed. It combines the image characteristics of a photograph with the geometric qualities of a map. A digital orthophoto has the same scale throughout and can be used as a map for measuring distances, calculating areas, determining the shape of features, and reading coordinate locations, for example. Digital orthophotos provide the necessary background (base map) layer information to which other spatial data layers are registered or created.
Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: 2004
Currentness_Reference: Publication date
Status:
Progress: Complete
Maintenance_and_Update_Frequency: As needed
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -73.732966
East_Bounding_Coordinate: -71.772690
North_Bounding_Coordinate: 42.054400
South_Bounding_Coordinate: 40.989047
Keywords:
Theme:
Theme_Keyword_Thesaurus: ISO 19115 Topic Category
Theme_Keyword: imageryBaseMapsEarthCover
Place:
Place_Keyword_Thesaurus: None
Place_Keyword: Connecticut
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. When printing this data on a map or using it in a software application, analysis, or report, please acknowledge the State of Connecticut, Departments of Environmental Protection and Transportation as the source for this information. For example, include the following data source description when printing this layer on a map: Photo centers - From the Connecticut 2004 Orthophoto Center Point layer, published by CT DEP and CT DOT.
Point_of_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization:
University of Connecticut Libraries Map and Geographic Information Center (MAGIC)
Contact_Address:
Address_Type: mailing address
Address: 369 Fairfield Way Unit 1005
City: Storrs
State_or_Province: CT
Postal_Code: 06269
Contact_Voice_Telephone: 860-486-4589
Contact_Electronic_Mail_Address: magic@uconn.edu
Security_Information:
Security_Classification_System: FIPS Pub 199
Security_Classification: No Confidentiality
Security_Handling_Description: Standard Technical Controls
Data_Quality_Information:
Logical_Consistency_Report: Tests for integrity have not been performed.
Completeness_Report:
The completeness of the data reflects the feature content of the data sources, which is photo index for the 2004 orthophotos in CAD format from the State of Connecticut, Department of Transportation.
Positional_Accuracy:
Horizontal_Positional_Accuracy:
Horizontal_Positional_Accuracy_Report: The horizontal positional accuracy of this data is unknown.
Lineage:
Process_Step:
Process_Description: Downloaded 2004 Aerial Photography Index from CTDEEP website
Process_Date: 20140102
Process_Step:
Process_Description:
Edited attribute table to include links to view and download aerial photographs from MAGIC's collections
Process_Date: 20141504
Spatial_Reference_Information:
Horizontal_Coordinate_System_Definition:
Planar:
Grid_Coordinate_System:
Grid_Coordinate_System_Name: State Plane Coordinate System 1983
State_Plane_Coordinate_System:
SPCS_Zone_Identifier: 600
Lambert_Conformal_Conic:
Standard_Parallel: 41.21143056
Standard_Parallel: 41.86666667
Longitude_of_Central_Meridian: -72.75
Latitude_of_Projection_Origin: 40.83333333
False_Easting: 1000003.2823599
False_Northing: 500000.00076
Planar_Coordinate_Information:
Planar_Coordinate_Encoding_Method: coordinate pair
Coordinate_Representation:
Abscissa_Resolution: 0.000250
Ordinate_Resolution: 0.000250
Planar_Distance_Units: feet
Geodetic_Model:
Horizontal_Datum_Name: North American Datum of 1983
Ellipsoid_Name: Geodetic Reference System 1980
Semi-major_Axis: 6378137.000000
Denominator_of_Flattening_Ratio: 298.257222
Entity_and_Attribute_Information:
Detailed_Description:
Entity_Type:
Entity_Type_Label: new_entity
Attribute:
Attribute_Label: OBJECTID
Attribute_Definition: Internal Feature Number(IMAGE_ID)
Attribute_Definition_Source: ESRI
Attribute:
Attribute_Label: Shape
Attribute_Definition: Feature geometry
Attribute_Definition_Source: ESRI
Attribute:
Attribute_Label: QUAD_NO
Attribute_Definition:
Quadrangle Number - An ID number designated by the State of Connecticut, Department of Environmental Protection, Natural Resources Center in the 1980's to uniquely identify individual 7.5 minute 1:24,000-scale USGS topographic quadrangle maps. The Quadrangle Number value of each point feature identifies the USGS topographic quadrangle map that the orthophoto center point is located on.
Attribute_Definition_Source: State of Connecticut, Department of Environmental Protection
Attribute:
Attribute_Label: QUAD_SEC
Attribute_Definition:
Quadrangle Section - There are 4 sections per 7.5 minute quadrangle, each one corresponding to a 3.75 minute quarter quadrangle area. The Quadrangle Section value of each point feature identifies the (NE, NW, SE, SW) section of the 7.5 minute 1:24,000-scale USGS topographic quadrangle map that the orthophoto center point is located on.
Attribute_Definition_Source: State of Connecticut, Department of Environmental Protection
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: NE
Enumerated_Domain_Value_Definition: Northeast quarter quandrangle
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: NW
Enumerated_Domain_Value_Definition: Northwest quarter quandrangle
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: SE
Enumerated_Domain_Value_Definition: Southeast quarter quandrangle
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: SW
Enumerated_Domain_Value_Definition: Southwest quarter quandrangle
Attribute:
Attribute_Label: QUADRANGLE
Attribute_Definition:
Quadrangle Name - Name of the 7.5 minute 1:24,000-scale USGS topographic quadrangle map published by the USGS that the orthophoto center point is located on.
Attribute_Definition_Source: U.S. Geological Survey
Attribute:
Attribute_Label: Link_PDF
Attribute_Definition: Link Provided to Download PDF file of Aerial Photograph
Attribute_Definition_Source:
University of Connecticut Libraries MAp and Geographic Information Center and the Connecticut State Data Center
Attribute:
Attribute_Label: Link_TIFF
Attribute_Definition: Link Provided to Download TIF file for Aerial Photograph
Attribute_Definition_Source:
University of Connecticut Libraries MAp and Geographic Information Center and the Connecticut State Data Center
Attribute:
Attribute_Label: Lin_GEOTIFF
Attribute_Definition: Link Provided to Download ZIP File for Aerial Photograph
Attribute_Definition_Source:
University of Connecticut Libraries MAp and Geographic Information Center and the Connecticut State Data Center
Attribute:
Attribute_Label: Scale
Attribute_Definition: Scale of aerial photograph
Attribute_Definition_Source:
University of Connecticut Libraries MAp and Geographic Information Center and the Connecticut State Data Center
Attribute:
Attribute_Label: Year
Attribute_Definition: Year aerial photography was taken
Attribute_Definition_Source:
University of Connecticut Libraries MAp and Geographic Information Center and the Connecticut State Data Center
Attribute:
Attribute_Label: OLD_ORTHOPHOTO_TILE
Attribute_Definition:
Old Orthophoto tile name - Name assigned by CT DEP to an initial, draft set of orthophoto image files first used by state agencies and distributed to the public. This set of imagery was subsequently replaced by a final set of orthophoto image files that were named according to the values in the ORTHOPHOTO_TILE field. The OLD_ORTHOPHOTO_TILE field is included as a cross-reference for backward compatibility with the initial draft set of orthophoto files.
Attribute_Definition_Source: State of Connecticut, Department of Environmental Protection
Attribute:
Attribute_Label: SHAPE
Attribute_Definition: Feature Geometry
Attribute_Definition_Source: ESRI
Attribute:
Attribute_Label: ORTHOPHOTO_TILE
Attribute_Definition:
Orthophoto tile name - Unique name assigned to each orthophoto tile, which is the basis for individual image files names such as 0400731161_2.tif and 0400731161_2.sid for data in TIF and SID format, respectively. The first 9 digits (e.g. 040073116) identify the USGS 7.5 minute quadrangle map the orthophoto is located on. These first 9 digits are a concatenation of latitude, longitude, and quadrangle numbers. Digits 1 to 3 and 4 to 6 (e.g. 040073) correspond to latitude and longitude values for the quadrangle. Digits 7 to 9 (e.g. 116) represent the quadrangle number. Appended to the first 9 digits is a tenth digit, ranging from 1 to 4, that identifies the 3.75-minute quarter quadrangle area the orthophoto is located on. Appended these first 10 digits is a second sequence number, ranging from 1 to 9 (_1, _2, _3… _9), that identifies the tile section for the orthophoto image (e.g. 0400731161_2). There are 9 possible tile sections per 3.75-minute quarter quadrangle area.
Attribute_Definition_Source: State of Connecticut, Department of Transportation
Overview_Description:
Entity_and_Attribute_Detail_Citation:
Citation 1: Insert your citations in the database table 2e_Citation
Distribution_Information:
Resource_Description: Downloadable Data
Distribution_Liability:
MAGIC is committed to offering its users accurate, useful, and current information about the state. Although every effort has been made to ensure the accuracy of information errors and conditions originating from physical sources used to develop the corporate database may be reflected in the data supplied. The client must be aware of data conditions and bear responsibility for the appropriate use of the information with respect to possible errors, original map scale, collection methodology, currency of data, and other conditions specific to certain data. MAGIC endorses but does not support secondary distribution of this data.
Metadata_Reference_Information:
Metadata_Date: 20140514
Metadata_Future_Review_Date: 20180514
Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata
Metadata_Standard_Version: FGDC-STD-001-1998
Generated by mp version 2.9.6 on Mon Jun 02 13:34:13 2014