NC OneMap AboutHelp
Launch Map Viewer
HomeSearch BrowseDownload Imagery


1990 TIGER/Line

Download Link:
Abstract: The NC Center for Geographic Information and Analysis, using US Department of Commerce, Bureau of the Census data, developed the GIS data set versions of the 1990 Census TIGER/Line files for each of the 100 counties in North Carolina. This data is stored in a county library under the layer name tiger90. Associated attribute tables also reside in each tile workspace.
Purpose: These file was developed to enable a user to see the geographic component from the 1990 Census. They can be used to join demographic data from the 1990 census for use in a GIS.
Supplemental Information: The TIGER/Line data included in these files were converted to ARC/INFO from the raw TIGER/Line format provided by the Census Bureau. The NC Center for Geographic Information and Analysis has converted all 100 counties in North Carolina to ARC/INFO format for interested users. DATA ORGANIZATION Four important INFO files are contained in each coverage: cover.TGR Tabular information for the record types 1,4,5, and 6 (This file can be joined directly to the AAT if you only need record type 1. Note that record types 4, 5, and 6 add additional records to each arc and create a one-to-many relationship between the AAT and the TGR files.) cover.RT3 Tabular information for record type 3 cover.AAT Arc attribute table cover.pat Polygon attribute table These library tiles also contain coverages where the block and blockgroup boundaries for the counties have been selected out into their own layers. system filename: /tiger90/libtigcb/tiles/<coabbrev.>/tiger90 files range from 2 - 39 mb each >Revisions and updates to this layer include: >2.) filename: tiger90_1298.dir - 100 county files. >The December 1998 update to this layer consisted of: >A) joining the FNAME attribute to the AAT file to enable >direct selection of feature names. >B) projecting the data from NAD27 datum, State Plane >projection, units of measure feet TO: NAD83 DATUM, State Plane >PROJECTION, UNITS OF MEASURE METERS. This was done to comply >with the NC Geographic Information Coordinating Council's >"Statement of Direction for North Carolina Corporate Geographic >Database Horizontal Reference, Datum and Unit of Measure". This >reprojecting was done in various ways depending on the data type >and content. Vector data was projected using the 'project' >command in ESRI's Arc software and topology was cleaned and built >based on coverage needs. Raster data was projected using ESRI's >Grid module and various steps as applicable. >1.) filename: tiger90_90.dir - 100 county files >The 1990 files are the original versions in nad27, stateplane, >feet.
Publication Date: 19981201
Originator: US Department of Commerce, Bureau of the Census
Publisher: US Department of Commerce, Bureau of the Census
Time Period of Content:
Time Period Information:
Range of Dates/Times:
Beginning Date: 1990
Ending Date: 19981201
Currentness Reference: Year covered by census and last digital changes
Progress: Complete
Maintenance and Update Frequency: None planned
Spatial Domain:
Bounding Coordinates:
West Bounding Coordinate: -84.422156
East Bounding Coordinate: -75.355691
North Bounding Coordinate: 36.617235
South Bounding Coordinate: 33.641966
Contact Organization: US Department of Commerce, Bureau of the Census
Contact Voice Telephone: (301) 763-4100
Contact Organization: US Department of Commerce, Bureau of the Census
Grid Coordinate System Name: State Plane Coordinate System 1983
Horizontal Datum Name: North American Datum of 1983
Planar Distance Units: meters
Ellipsoid Name: Geodetic Reference System 80
Attribute Label: OBJECTID
Attribute Definition: Internal feature number.
Attribute Definition Source: ESRI
Attribute Domain Values:
Unrepresentable Domain: Sequential unique whole numbers that are automatically generated.
Attribute Label: onemap_prod.SDEADMIN.tiger90_poly.AREA
Attribute Label: PERIMETER
Attribute Label: TIGER90_
Attribute Label: TIGER90_ID
Attribute Label: ZIPCO
Attribute Label: AIR
Attribute Label: ANRC
Attribute Label: ST
Attribute Label: CNT
Attribute Label: MCD
Attribute Label: SUBMCD
Attribute Label: PLACE
Attribute Label: CTBNA
Attribute Label: BLK
Attribute Label: LPOLY_
Attribute Label: RPOLY_
Attribute Label: SHAPE
Attribute Definition: Feature geometry.
Attribute Definition Source: ESRI
Attribute Domain Values:
Unrepresentable Domain: Coordinates defining the features.
Attribute Label: SHAPE.area
Attribute Label: SHAPE.len
Distribution Liability: NCCGIA is charged with the development and maintenance of NC OneMap and, in cooperation with other mapping organizations, is committed to offering its users accurate, useful, and current information. Although every effort has been made to ensure the accuracy of information, errors and conditions originating from physical sources used to develop this dataset may be reflected in the data supplied. The user must be aware of possible 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. NCCGIA does not support secondary distribution of this dataset without its current, compliant metadata record. The use of trade names or commercial products does not constitute their endorsement by NCCGIA or North Carolina State Government.
:: NC OneMap GeoSpatial Portal - Geographic Data Serving a Statewide Community ::

Please read the Disclaimer and Privacy or Contact Us.