The NC Center for Geographic Information and Analysis, using US Department of Commerce, Bureau of the Census data, developed the digital 1970 Census Boundaries/Population data file containing easily accessible population and housing counts for the state of North Carolina.
This file was developed to enable a user to see population and housing statistics from the 1970 Census as a way of track population and housing counts over time. This data was created to assist governmental agencies and others in making resource management decisions through use of a Geographic Information System (GIS).
Mixed census units were used to develop this layer. For example, some counties contain census tracts and enumeration districts while others only contain census tracts. The identification numbers for each unit may not necessarily correspond to census statistical tapes. County boundaries depicted in these files are not consistent with other county boundary files used and distributed by CGIA. >system filename: cen70 file size = 2.9 mb > >Revisions and updates to this layer include: >2.) filename: cen701298 The December 1998 update to this layer >consisted of 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: cen70794 July 1994 - (also archived as nc.cen70, >filename was change July 31, 1996, no data changed). >Due to discrepancies in population totals, the DEHNR-State Center >for Health Statistics, Environmental Statistics and GIS >Section reviewed the population totals and corrected >inaccuracies in July 1994. Due to funding constraints, the >previous file had only been thoroughly quality-controlled >within the Albemarle-Pamlico Estuarine Study Area.
Data creation and revision dates
County boundaries depicted in these files are not consistent with other county boundary files used and distributed by CGIA. Acknowledgement of products derived form this data set should cite the following: The source of the 1970 Census Boundaries/Population data is the North Carolina Corporate Geographic Database. Earlier versions of this data set may exist. The user must be sure to use the appropriate data set for the time period of interest. While efforts have been made to ensure that these data are accurate and reliable within the state of the art, CGIA cannot assume liability for any damages or misrepresentation caused by any inaccuracies in the data or as a result of changes to the data caused by system transfers.
301 North Wilmington Street, Suite 700
Preferred contact is by email or telephone
>Bureau of the Census >Data User Service Center >U.S. Department of Commerce >Bureau of the Census >Data User Service Center >Washington, D.C.20233 > >State Center for Health Statistics Director, Delton Atkinson >Environmental Statistics and GIS Section Chief, David Hogt >GIS Laboratory Director, Carol Hanchette >NC Dept. of Environment, Health, and Natural Resources >222 N. Dawson Street, Cotton Building >Raleigh, North Carolina 27604 > >NCCGIA Director, Karen Siderelis >Database Administration, Zsolt Nagy >Database Management, Ken Shaffer >North Carolina Center for Geographic Information and Analysis >Governor's Office >Office of State Planning >301 North Wilmington Street, Suite 700 >Raleigh, NC 27601-2828
The US Dept. of Commerce, Bureau of the Census delineated the 1970 census boundaries on maps at approximately 1:126,720-scale. An ARC/INFO version 5.0 coverage was created and the data attributed. The digital files were plotted and overlayed to the originals and linework and label corrections were made. Demographic information was taken from Census reports and keyed into the attribute tables.
Using ESRI's ARC/INFO GIS software, the dataset was built for arc and polygon topology using the "build" command. The data set was then cleaned with a fuzzy tolerance of 1 foot. Topology has not been edited since the last build or clean.
These data represent a subset of the boundary and population information for 1970, as mapped by the US Dept. of Commerce, Bureau of the Census.
The 1970 Boundaries/Population data were mapped from paper blueline census maps and line check plots were edited within the original linewidth on the blueline base. precision: single, fuzzy: 1.0, dangle: 1.0.
1970 Boundary/Population statistics and blueline Census maps.
Digital conversion of the Census data into a GIS data set and release of corrected data.
Review and corrections to original 1970 Boundary/Population data
Delineation of Census geography and collection of 1970 Decennial Census statistics
Bureau of the Census
Mail or telephone preferred
Transfer of hardcopy census boundaries by digitization and joining of Census statistics from hardcopy into digital attribute files. An ARC/INFO version 5.0 coverage was created by digitizing 1970 Census boundaries on Calcomp digitizing tables.
301 North Wilmington Street, Suite 700
Email or telephone preferred
Demographic values were checked against hardcopy reports.
222 N. Dawson Street, Cotton Building
Mail or telephone preferred
Dataset copied.
Internal feature number.
ESRI
Internal feature number.
ESRI
Total perimeter in coverage units
Software computed
1970 Census identification code
US Dept. of Commerce, Bureau of the Census
Unique Comarc record# by county
US Dept. of Commerce, Bureau of the Census
Housing count for district
US Dept. of Commerce, Bureau of the Census
County Federal Processing Information Standard code
US Dept. of Commerce, Bureau of the Census
City and water body names
US Dept. of Commerce, Bureau of the Census
Feature geometry.
ESRI
Feature geometry.
ESRI
From-node identifier of linear feature
Software computed
To-node identifier of linear feature
Software computed
Internal number of poly to left of arc
Software computed
Internal number of poly to right of arc
Software computed
Length of arc in coverage units
Software computed
Internal feature number
Software computed
Arc internal identification number
User defined
A polygon coverage depicting the 1970 census boundaries and population as established by the US Dept. of Commerce, Bureau of the Census. The polygon attribute table (PAT) has data including total area in coverage units (square meters), total perimeter (linear meters), polygon internal identification number, polygon user identification number, unique Comarc Record# by county, 1970 Census Identification code, city and water body names, population and housing counts for the district, population per acre for 1970 census, and the county FIPS code. >CEN70.PAT Polygon Attribute Table >COLUMN ITEM NAME WIDTH OUTPUT TYPE DEC DESCRIPTION >1 AREA 4 12 F 3 Total area in meters >5 PERIMETER 4 12 F 3 Total perimeter in meters >9 CEN70# 4 5 B - Poly internal id number >13 CEN70-ID 4 5 B - Poly user id number >17 LABEL1 4 5 B - Unique Comarc Record# by county >21 DISTRICT 10 10 C - 1970 census identification code >31 CITY 20 20 C - City and water body names >51 POP# 4 10 B - Population count for district >55 HOUSING 4 5 B - Housing count for district >59 POP.ACRE1970 4 10 F 3 Population per acre for 1970 census >63 FIPS 3 3 C - County FIPS code >CEN70.AAT Arc Attribute Table >COLUMN ITEM NAME WIDTH OUTPUT TYPE DEC DESCRIPTION >1 FNODE# 4 5 B - From-node id of linear feature >5 TNODE# 4 5 B - To-node id of linear feature >9 LPOLY# 4 5 B - Left-side polygon id of linear >feature >13 RPOLY# 4 5 B - Right-side polygon id of linear >feature >17 LENGTH 4 12 F 3 Length of linear feature in meters >21 CEN70# 4 5 B - Internal id number >25 CEN70-ID 4 5 B - Internal id number
None
301 North Wilmington Street, Suite 700
Phone and electronic mail preferred For current price information use a web browser: COST INFORMATION - http://www.cgia.state.nc.us/cost.html
NCCGIA is charged with the development and maintenance of the State's corporate geographic database and, in cooperation with other mapping organizations, 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. NCCGIA does not support secondary distribution of this data. The use of trade names or commercial products does not constitute their endorsement by the NCCGIA or North Carolina State Government.
Data creation and large data analysis jobs contact Database Administration P:(919)733-2090. All data is available through standard ordering procedures on a cost recovery basis.
301 North Wilmington Street, Suite 700
Phone and electronic mail preferred