Geodataset Name:       CENBLK1990
Geodataset Type:       SHAPEFILE
Geodataset Feature:    Polygon
Feature Count:         314762

DATA SOURCE(S):                    Minnesota Population Center
SCALE OF ORIGINAL SOURCE MAPS:     various
GEODATASET EXTENT:                 State of Florida

PUBLICATION DATE:                  20071231
TIME PERIOD OF CONTENT:            1990
DOWNLOAD LINK:                     http://www.fgdl.org/metadataexplorer/explorer.jsp

FEATURE ATTRIBUTE TABLES:

Datafile Name: CENBLK1990

FEATURE ATTRIBUTE TABLES CODES AND VALUES:

Item	Item Description
OBJECTID	Internal feature number.
Shape	Feature geometry.
FIPSSTCO	FIPS code
TRACT	Census Tract Code
BLOCK	Block Code
STFID	Census ID
GISJOIN	GIS Join match code
GISJOIN2	GIS Join match code
YEAR	Datafile year
NATIONA	Nation Code
ANRCA	Alaska Native Regional Corporation Code
AIANHHA	American Indian Area/Alaska Native Area/Hawaiian Home Land Code
RES_TRSTA	Reservation/Trust Lands Code
BLOCKA	Block Code
BLCK_GRPA	Block Group Code
TRACTA	Census Tract Code
CDA	Congressional District Code
C_CITYA	Consolidated City Code
COUNTY	County Name
COUNTYA	County Code
CTY_SUBA	County Subdivision Code
DIVISIONA	Division Code
MSA_CMSAA	Metropolitan Statistical Area/Consolidated Metropolitan Statistical Area Code
PLACEA	Place Name
PMSAA	Primary Metropolitan Statistical Area Code
REGIONA	Region Code
STATE	State Name
STATEA	State Code
URBRURALA	Urban/Rural Code
URB_AREAA	Urban Area Code
ANPSADPI	Area Name/PSAD Term/Part Indicator
ACRES	Acres
POP1990	Total Persons
AGE_UNDER5	Persons under 5 - ET3001 + ET3002 + ET3003
AGE_5_17	Persons 5 - 17 - ET3004 + ET3005 + ET3006 + ET3007 + ET3008 + ET3009 + ET3010 + ET3011 + ET3012
AGE_18_21	Persons 18 - 21 - ET3013 + ET3014 + ET3015 + ET3016
AGE_22_29	Person 22 - 29 - ET3017 + ET3018
AGE_30_39	Persons 30 - 39 - ET3019 + ET3020
AGE_40_49	Persons 40 - 49 - ET3021 + ET3022
AGE_50_64	Persons 50 - 64 - ET3023 + ET3024 + ET3025 + ET3026
AGE_65_UP	Persons 65 and up - ET3027 + ET3028 + ET3029 + ET3030 + ET3031
POP18	Population 18 and older - AGE_18_21 + AGE_22_29 + AGE_30_39 + AGE_40_49 + AGE_50_64 + AGE_65_UP
POPUNDER18	Population under the age of 18 - AGE_UNDER5 + AGE_5_17
FEMALES	Females - EUX002
MALES	Males - EUX001
WHITE	White - EUY001
BLACK	Black - EUY002
AMERI_ES	American Indian, Eskimo, or Aleut - EUY003
ASIAN_PI	Asian or Pacific Islander - EUY004
ASIAN	Asian - EUZ006 + EUZ007 + EUZ008 + EUZ009 + EUZ010 + EUZ011 + EUZ012 + EUZ013 + EUZ014 + EUZ015 + EUZ016
HAWN_PI	Hawaiian Pacific Islander - EUZ017 + EUZ018 + EUZ019 + EUZ020 + EUZ021 + EUZ022 + EUZ023 + EUZ024 + EUZ025
HISPANIC	Persons of Hispanic Origin - EU0001
WHITE_NH	Not of Hispanic origin >> White - ET2001
NOT_HISP	Not of Hispanic origin - EU1001
MINORITY	"Minority Population" or Population that is not white (note: Minority is not a Census Bureau term ) (POP1990 - WHITE_NH)
OTHER	Other race - EUY005
HOUSEHOLDS	Total Households - EUO001
HSE_UNITS	Total Housing Units - ESA001
VACANT	Vacant Housing units - ESN002
OWNER_OCC	Owner occupied Housing units - ES1001
RENTER_OCC	Renter occupied Housing units - ES1002
POPDENS	Population density - POP1990/ACRES
FGDLAQDATE	Date data acquired by GeoPlan
AUTOID	Unique ID added by GeoPlan
AVE_FAM_SZ	Persons per family - EUA001
SHAPE.AREA	Area in meters
SHAPE.LEN	Perimeter in meters

The most important attribute in this shapefile is GISJOIN because it provides the link between the shapefile and the aggregate data files. Any aggregate data file obtained through the NHGIS data access system will contain a GISJOIN attribute. Use this attribute to link the data with the shapefile for mapping purposes. Please note that values in GISJOIN begin with "G" in order to retain leading zeros. This update took effect on May 7, 2008. Attribute GISJOIN2 is an alternative linking attribute. GISJOIN2 is similar to GISJOIN except that its values do not begin with "G". GISJOIN2 may be used when linking to an aggregate data file extracted before May 7, 2008.

USER NOTES:

GeoPlan relied on the integrity of the source data

The geographic areas represented in version 2.0 release have a matching record in the aggregate data files. Some geographic areas, however, do not have a matching aggregate data record. Additionally, some records in the aggregate data files could not be mapped because they are not represented in the boundary file. Version 2.0 boundary files have not been generalized, and geographic areas containing parts of the following bodies of water do not have historically accurate coastlines: the Great Lakes, Atlantic Ocean, Pacific Ocean, and the Gulf of Mexico. No geographic areas overlap and any polygon belongs to one and only one unique geographic entity. Every geographic entity has a FIPS-like code (GISJOIN) that uniquely identifies it. The aggregate data file contains a matching code (GISJOIN) so that the files can be easily joined together.

All attributes in this boundary file were checked against attributes in the available aggregate data to ensure accuracy and consistency. The boundary file may contain more or fewer geographic entities than the aggregate data file. Sources for the boundary files sometimes depicted geographic areas that were not listed in the aggregate data file. Sometimes, the aggregate data files contains records for geographic areas that are not mappable (e.g. geographic entities representing water off of coastal areas).

The NHGIS is an National Science Foundation-sponsored project (Grant No. BCS0648045) to supplement the digital spatial-temporal database created during NHGIS. The available shapefiles on the NHGIS site represent version 2.0 of historical US boundary files representing various geographic entities for the 1790- 2000 censuses. These electronic census boundary files were created from TIGER 2000 UA file. The boundary files have been checked against currently available historical census aggregate data. Census blocks, the smallest geographic area for which the Bureau of the Census collects and tabulates decennial census data, are formed by streets, roads, railroads, streams and other bodies of water, other visible physical and cultural features, and the legal boundaries shown on Census Bureau maps. (PG 11-1)

These data are based upon work supported by the National Science Foundation under Grant No. BCS0648045 . NHGIS continuation grant has two major objectives: First, to add geographic levels to NHGIS files for 1980-2000. The new NHGIS geographies will include block, place, enumeration district, congressional district, and Zip Code Tabulation Areas. These new in addition to previously released geographic levels will then be synchronized to align with the revised TIGER/Line files. Second, the American Community Survey will be incorporated into the NHGIS. The release of these data partially completes the first objective of the NHGIS- continuation grant. These files will be re-released when conflated with the newly updated TIGER file.

The horizontal positional accuracy of the source data is derived from TIGER 2000 UA . The boundaries representing the geographic entity was taken directly from the TIGER/Line file - no hand editing was done to the file.

This data is provided 'as is' and its vertical positional accuracy has not been verified by GeoPlan

This dataset was produced with an intended application at the city, county, metropolitan, or state/territory level. Appropriate uses include thematic mapping of census data and spatial analysis of census data. If these data are altered or incorporated into another dataset, they are not to be redistributed without also: altering the name of the dataset, including a Content Standards for Digital Geospatial Metadata (FGDC-STD-001-1998) compliant metadata file that describes the dataset and reflects the alteration steps that makes the new dataset different from this one, and citing this dataset in the metadata as a source for the altered dataset using the source citation specified below. If these digital data are used in the production of a report or in the compilation of a standalone printed map, then this dataset is to be cited in the report or on the map using the source citation specified below. The following source citation should be used when citing this dataset: Minnesota Population Center. National Historical Geographic Information System: Version 2.0. Minneapolis, MN: University of Minnesota 2007. No fee may be charged for use or distribution. Publications and research reports based on the database must cite it appropriately. Users are requested to send a copy of any publications, research reports, or educational material making use of the data or documentation. Printed matter should be sent to: NHGIS Minnesota Population Center University of Minnesota 50 Willey Hall 225 19th Avenue South Minneapolis, MN 55455

The Florida Geographic Data Library is a collection of Geospatial Data compiled by the University of Florida GeoPlan Center with support from the Florida Department of Transportation. GIS data available in FGDL is collected from various state, federal, and other agencies (data sources) who are data stewards, producers, or publishers. The data available in FGDL may not be the most current version of the data offered by the data source. University of Florida GeoPlan Center makes no guarantees about the currentness of the data and suggests that data users check with the data source to see if more recent versions of the data exist. Furthermore, the GIS data available in the FGDL are provided 'as is'. The University of Florida GeoPlan Center makes no warranties, guaranties or representations as to the truth, accuracy or completeness of the data provided by the data sources. The University of Florida GeoPlan Center makes no representations or warranties about the quality or suitability of the materials, either expressly or implied, including but not limited to any implied warranties of merchantability, fitness for a particular purpose, or non-infringement. The University of Florida GeoPlan Center shall not be liable for any damages suffered as a result of using, modifying, contributing or distributing the materials. A note about data scale: Scale is an important factor in data usage. Certain scale datasets are not suitable for some project, analysis, or modeling purposes. Please be sure you are using the best available data. 1:24000 scale datasets are recommended for projects that are at the county level. 1:24000 data should NOT be used for high accuracy base mapping such as property parcel boundaries. 1:100000 scale datasets are recommended for projects that are at the multi-county or regional level. 1:125000 scale datasets are recommended for projects that are at the regional or state level or larger. Vector datasets with no defined scale or accuracy should be considered suspect. Make sure you are familiar with your data before using it for projects or analysis. Every effort has been made to supply the user with data documentation. For additional information, see the References section and the Data Source Contact section of this documentation. For more information regarding scale and accuracy, see our webpage at: http://geoplan.ufl.edu/education.html

REFERENCES: DATA LINEAGE SUMMARY:

Used the TGR2SHP program to convert the 2000 UA TIGER/Line files to shapefiles. TGR2SHP allowed us to create shapefiles for the different Census features (blocks, block groups, places, county subdivisions, etc.). TGR2SHP can be downloaded from http://tnatlas.geog.utk.edu/downloadfree.htm Process Date: Defined the projection as Geographic/NAD 83 for each shapefile created by TGR2SHP. Process Date: For any given Census feature, we appended together all counties in a state to create a state-wide shapefile. Process Date: Projected each state-wide shapefile to Albers Equal Area - Lambert Conformal Conic. Process Date: Used the coastline we developed for the historic census tracts and counties clipped out the water from the state-wide shapefiles that border the Gulf of Mexico, the Atlantic Ocean, the Pacific Ocean, or the Great Lakes. Process Date: Converted integer fields to text fields. Process Date: Created the GISJOIN attribute in the shapefile. This GISJOIN attribute should be used to join attribute data obtained from the NHGIS website to the shapefile. Process Date: Appended state-wide shapefiles (except for blocks and block groups - these are available at the state level) together to create a nation-wide shapefile. Process Date: For census features that do not nest within counties or states (e.g., places, American Indian areas, etc.), we dissolved the nationwide shapefiles to create the actual features. Process Date: Used ArcCatalog's metadata tools to write FGDC-compliant metadata. Process Date: GeoPlan downloaded this data set from https://www.nhgis.org/ on two different dates: the shapefile was downloaded on November 2, 2011 the attribute data was downloaded on December 30, 2011 When downloaded, the shapefile was in USA_Contiguous_Albers_Equal_Area_Conic - Datum NAD83. The shapefile was projected to Albers HPGN. The attribute data was joined to the shapefile based on the field GISJOIN. Fields were renamed to match existing FGDL field names for 2000 and 2010 census. The following fields had no data and were deleted: NATION,RESERVTNA,TRUSTA,RES_ONLYA,AIANHH,RES_TRST,MSA_CMSA, PLACE,PMSA,URBRURAL,URB_AREA -Added FGDLAQDATE based on date data was retrieved from source. -Renamed from FL_block_1990 to CENBLK1990 Process Date: 20120105 Dataset copied. Process Date: 20120315 Dataset copied. Process Date: 20120404

MAP PROJECTION PARAMETERS:

Projection                          ALBERS
Datum                               HPGN
Units                               METERS
Spheroid                            GRS1980
1st Standard Parallel               24  0  0.000
2nd Standard Parallel               31 30  0.000
Central Meridian                   -84 00  0.000
Latitude of Projection's Origin     24  0  0.000
False Easting (meters)              400000.00000
False Northing (meters)             0.00000

DATA SOURCE CONTACT (S):

Name:
Abbr. Name:
Address:


Phone:

Web site:
E-mail:
Contact Person:
         Phone:
        E-mail:

Minnesota Population Center
NHGIS
50 Willey Hall, 225 19th Avenue South
Minneapolis, Minnesota
55455
612-625-7375


http://www.nhgis.org
nhgis@pop.umn.edu
Petra Noble

Name:                   FLORIDA GEOGRAPHIC DATA LIBRARY
Abbr. Name:             FGDL
Address:                Florida Geographic Data Library
                        431 Architecture Building
                        PO Box 115706
                        Gainesville, FL  32611-5706
Web site:               http://www.fgdl.org

Contact FGDL: 

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      FGDL Frequently Asked Questions:  http://www.fgdl.org/fgdlfaq.html
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