Census Blocks, Suffolk County (ARC Export : 1998)


Identification_Information:
Citation:
Citation_Information:
Originator: U.S. Department of Commerce. Bureau of the Census
Publication_Date: 1998
Title: Census Blocks, Suffolk County (ARC Export : 1998)
Publication_Information:
Publication_Place: Washington, DC
Publisher: Bureau of the Census
Online_Linkage: http://cugir.mannlib.cornell.edu/bucketinfo.jsp?id=205
Description:
Abstract: These files are an extract of selected geographic and cartographic information from the 1995 TIGER/Line files detailing census blocks. This dataset includes census block numbers, water blocks, and current geography.
Purpose: For use in conjunction with other Census data in geographic and demographic analysis.
Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: 1995
Currentness_Reference: Publication Date
Status:
Progress: Complete
Maintenance_and_Update_Frequency: Not applicable
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -73.497
East_Bounding_Coordinate: -71.777
North_Bounding_Coordinate: 41.310
South_Bounding_Coordinate: 40.534
Keywords:
Theme:
Theme_Keyword_Thesaurus: None
Theme_Keyword: Census Blocks
Theme_Keyword: Census Block Numbers
Theme_Keyword: Water Blocks
Theme_Keyword: Current Geography
Theme:
Theme_Keyword_Thesaurus: LCSH
Theme_Keyword: Census districts -- New York (State) -- Suffolk County -- Maps.
Theme_Keyword: Zoning -- New York (State) -- Suffolk County -- Maps.
Theme:
Theme_Keyword_Thesaurus: ISO 19115 Topic Category
Theme_Keyword: boundaries
Theme_Keyword: society
Place:
Place_Keyword_Thesaurus: LCSH
Place_Keyword: Suffolk County (N.Y.) -- Maps.
Place_Keyword: Suffolk County (N.Y.) -- Administrative and political divisions -- Maps.
Place_Keyword: New York (State)
Access_Constraints: None
Use_Constraints: None. Acknowledgement of the U.S. Bureau of the Census would be appreciated for products derived from these files. TIGER, TIGER/Line and Census TIGER are trademarks of the Bureau of the Census.
Point_of_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: Albert R. Mann Library
Contact_Address:
Address_Type: Mailing and Physical Address
Address: Cornell University
City: Ithaca
State_or_Province: New York
Postal_Code: 14853
Contact_Voice_Telephone: 607-255-5406
Contact_Electronic_Mail_Address: mann_ref@cornell.edu
Native_Data_Set_Environment: Converted into Arc/Info format in HP-UX environment.

Data_Quality_Information:
Attribute_Accuracy:
Attribute_Accuracy_Report: Original TIGER/Line data is accurate against Federal Processing Standards (FIPS), FIPS Publication 6-4 and FIPS-55 at the 100% level for the codes and base names. The remaining attribute information has been examined but has not been fully tested for accuracy.
Logical_Consistency_Report: According to TIGER/Line documentation: the feature network of lines (as represented by Record Types 1 and 2) is complete for census purposes. Spatial objects in TIGER/Line belong to the "Geometry and Topology" (GT) class of objects in the "Spatial Data Transfer Standard" (SDTS) FIPS publication 173 and are topologically valid. Node/geometry and topology (GT)-polygon/chain relationships are collected or generated to satisfy topological edit requirements. These requirements include: complete chains must begin and end at nodes, complete chains must connect to each other at nodes, complete chains do not extend through nodes, left and right GT-polygons are defined for each complete chain element and are consistent throughout the extract process, and the chains representing the limits of the files are free of gaps. The Census Bureau performed automated tests to ensure logical consistency and limits of files. All polygons are tested for closure. Some polygons in the TIGER/Line files may be so small that the polygon internal point has been manually placed on a node that defines the polygon perimeter. These small polygons have been detected, and corrections will be incorporated in the Census TIGER data in the future. The Census Bureau uses its internally developed Geographic Update System to enhance and modify spatial and attribute data in the Census TIGER data base. Standard geographic codes, such as FIPS codes for states, counties, municipalities and places, are used when encoding spatial entities. The Census Bureau performed spatial data tests for logical consistency of the codes during the compilation of the original Census TIGER data base files. Most of the codes themselves were provided to the Census Bureau by the USGS, the agency responsible for maintaining FIPS 55. Feature attribute information has been examined but has not been fully tested for consistency.
Completeness_Report: Data completeness reflects the contents of TIGER/Line 1995.
Positional_Accuracy:
Horizontal_Positional_Accuracy:
Horizontal_Positional_Accuracy_Report: DLG accuracy is 120 ft. DIME accuracy is 300 ft.
Quantitative_Horizontal_Positional_Accuracy_Assessment:
Horizontal_Positional_Accuracy_Value: 120 ft.
Horizontal_Positional_Accuracy_Explanation: Resolution as reported.
Lineage:
Source_Information:
Source_Citation:
Citation_Information:
Originator: U.S. Department of Commerce. Bureau of the Census.
Publication_Date: 1995
Title: TIGER/Line
Publication_Information:
Publication_Place: Washington, DC
Publisher: U.S. Department of Commerce. Bureau of the Census. Data User Services Division.
Type_of_Source_Media: CD-ROM
Source_Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: 1995
Source_Currentness_Reference: Publication Date
Source_Citation_Abbreviation: None
Source_Contribution: Provided data concerning New York State. Information about sources used to create TIGER/Line is available at http://www.census.gov/geo/www/tiger/tigermetadata. html (as of 7/28/98).
Process_Step:
Process_Description: Information concerning steps taken to create TIGER/Line is available in "Chapter 5: Data Quality" in TIGER/Line 1995 Documentation (as of 7/28/98 available at http://www.census.gov/geo/www/tiger/tl95doc.html).
Process_Date: Unknown
Process_Step:
Process_Description: This file was processed from TIGER/Line 1995, by conversion into Arc/Info coverage format using the TIGERTOOL command in a custom AML program run in Arc/Info version 7.1.2. Most label errors were corrected. It was then exported into Arc/Info Interchange format (.e00). This file was also reprojected from Geographic to Universal Transverse Mercator, with units converted from decimal degrees to meters. Some corrections were made to the data in this conversion process.
Process_Date: 1998

Spatial_Data_Organization_Information:
Direct_Spatial_Reference_Method: Vector

Spatial_Reference_Information:
Horizontal_Coordinate_System_Definition:
Planar:
Grid_Coordinate_System:
Grid_Coordinate_System_Name: Universal Transverse Mercator
Universal_Transverse_Mercator:
UTM_Zone_Number: 18
Transverse_Mercator:
Scale_Factor_at_Central_Meridian: .9996
Longitude_of_Central_Meridian: 75
Latitude_of_Projection_Origin: 0
False_Easting: 0
False_Northing: 0
Planar_Coordinate_Information:
Planar_Coordinate_Encoding_Method: Coordinate pair
Coordinate_Representation:
Abscissa_Resolution: Unknown
Ordinate_Resolution: Unknown
Planar_Distance_Units: Meters

Entity_and_Attribute_Information:
Overview_Description:
Entity_and_Attribute_Overview: For entity and attribute information, consult the Tiger95 documentation. See "Chapter 3: Attributes of Geographic Objects" and "Chapter 4: Geographic Entities". Available online at http://www.census.gov/geo/www/tiger/tl95doc.html (as of 7/28/98).

Distribution_Information:
Distributor:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: Albert R. Mann Library
Contact_Address:
Address_Type: Mailing and Physical Address
Address: Cornell University
City: Ithaca
State_or_Province: New York
Postal_Code: 14853
Contact_Voice_Telephone: 607-255-5406
Contact_Electronic_Mail_Address: mann_ref@cornell.edu
Distribution_Liability: Cornell Unversity provides these geographic data "as is." Cornell University makes no guarantee or warranty concerning the accuracy of information contained in the geographic data. Cornell University further makes no warranty either expressed or implied, regarding the condition of the product or its fitness for any particular purpose. The burden for determining fitness for use lies entirely with the user. Although these files have been processed successfully on computers at Cornell University, no warranty is made by Cornell University regarding the use of these data on any other system, nor does the fact of distribution constitute or imply any such warranty.

Metadata_Reference_Information:
Metadata_Date: 199807
Metadata_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: Albert R. Mann Library
Contact_Address:
Address_Type: Mailing and Physical Address
Address: Cornell University
City: Ithaca
State_or_Province: New York
Postal_Code: 14853
Contact_Voice_Telephone: 607-255-5406
Contact_Electronic_Mail_Address: mann_ref@cornell.edu
Metadata_Standard_Name: FGDC Content Standards For Digital Geospatial Metadata
Metadata_Standard_Version: FGDC-STD-001-1998