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tgr25001lka - TIGER/Line Files, Redistricting Census 2000 - Roads |
Metadata also available as: FAQ | TEXT
This data layer is a subset of the complete TIGER/Line data set. It was downloaded from the Census 2000 TIGER/Line Data mainted at the ESRI (www.esri.com) Geography Network (www.geographynetwork.com). It contains only the roads for the Barnstable County, Massachusetts area as required for the project GIS view area.
* 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. * 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. The Census Bureau uses its internally developed Geographic Update System to enhance and modify spatial and attribute data in the Census TIGER database. 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 database 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.
Line Features - 1) Roads 2) Railroads 3) Hydrography 4) Miscellaneous transportation features and selected power lines and pipe lines 5) Legal (governmental unit) and statistical boundaries
Landmark Features - 1) Point landmarks, e.g., schools and churches; sporatic coverage added on an as-needed basis 2) Area landmarks, e.g., Parks and cemeteries; sporatic coverage added on an as-needed basis
Polygon features - 1) Geographic entity codes for areas used to tabulate the Census 2000 census statistical data and governmental unit boundaries legally in effect as of the latest Boundary and Annexation Survey (BAS) 2) Locations of area landmarks The line features and polygon information form the majority of data in the TIGER/Line files. Some of the data/attributes describing the lines include coordinates, feature identifiers (names), CFCCs (used to identify the most noticeable characteristic of a feature), address ranges, and geographic entity codes. The Census Bureau includes landmark featureson an as-needed-basis and has made no attempt to ensure thatall instances of a particular landmark feature were included. The TIGER/Line files contain point and area labels that describe landmark features and provide locational reference. Area landmarks consist of a feature name or label and feature Landmarks may overlap or refer to the same set of polygons.The Census TIGER database uses collections of spatial objects (points, lines, and polygons) to model or describe real-world geography. The Census Bureau uses these spatial objects to represent features such as streets, rivers, and political boundaries and assigns attributes to these features to identify and describe specific features such as the 500 block of Market Street in Philadelphia, Pennsylvania.
The boundary information in the TIGER/Line files are for statistical data collection and tabulation purposes only; their depiction and designation for statistical purposes does not constitute a determination of jurisdictional authority or rights of ownership or entitlement.
