Geodataset Name:       CENBLKGRP1990
Geodataset Type:       SDE Feature Class
Geodataset Feature:    Polygon
Feature Count:         9088

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: CENBLKGRP1990

FEATURE ATTRIBUTE TABLES CODES AND VALUES:

Item	Item Description
OBJECTID	Internal feature number.
Shape	Feature geometry.
FIPSSTCO	FIPS code (state and county)
GROUP_	No description
TRACT	Census Tract Code
STFID	Census ID
GISJOIN	GIS Join match code
GISJOIN2	GIS Join match code
YEAR	Datafile year
NATIONA	Nation Code
BLCK_GRPA	Block Group Code
TRACTA	Census Tract Code
COUNTY	County Name
COUNTYA	County Code
DIVISIONA	Division Code
MSA_CMSAA	Metropolitan Statistical Area/Consolidated Metropolitan Statistical Area Code
PMSAA	Primary Metropolitan Statistical Area Code
REGIONA	Region Code
STATE	State Name
STATEA	State Code
ANPSADPI	Area Name/PSAD Term/Part Indicator
ACRES	Acres
POP1990	Total Persons - SF1 - [ET1001]
FAMILIES	Total Families - SF1 - [EUD001]
HOUSEHOLDS	Total Households - SF1 - [EUO001]
UR_URBIN	Persons Urban: Inside urbanized area - SF1 - [EUW001]
UR_URBOUT	Persons Urban: Outside urbanized area - SF1 - [EUW002]
UR_RURAL	Persons Rural - SF1 - [EUW003]
UR_NA	Persons Not defined for this file - SF1 - [EUW004]
MALE	Persons Male - SF1 - [EUX001]
FEMALE	Persons Female - SF1 - [EUX002]
WHITE	Persons White - SF1 - [EUY001]
BLACK	Persons Black - SF1 - [EUY002]
AMERI_ES	Persons American Indian, Eskimo, or Aleut - SF1 - [EUY003]
ASIAN_PI	Persons Asian or Pacific Islander - SF1 - [EUY004]
OTHER	Persons Other race - SF1 - [EUY005]
ASIAN	Persons Asian. Includes: Asian (600-652, 976, 977, 979-982, 985): Chinese (605-607, 976),Filipino (608, 977),Japanese (611, 981),Asian Indian (600, 982),Korean (612, 979),Vietnamese (619, 980),Cambodian (604),Hmong (609),Laotian (613),Thai (618),Other Asian (601-603, 610, 614-617, 620-652, 985) SF1 - [EUZ006]+[EUZ007]+[EUZ008]+[EUZ009]+[EUZ010]+[EUZ011]+[EUZ012]+[EUZ013]+[EUZ014]+[EUZ015]+[EUZ016]
HAWN_PI	Persons Pacific Islander. Includes: Pacific Islander (653-699, 978, 983, 984): Polynesian (653-659, 978, 983): Hawaiian (653, 654, 978),Samoan (655, 983),Tongan (657),Other Polynesian (656, 658, 659): Micronesian (660-675, 984): Guamanian (660, 984),Other Micronesian (661-675),Melanesian (676-680),Pacific Islander, not specified (681-699),Other race (700-799, 986-999) - SF1 - [EUZ017]+[EUZ018]+[EUZ019]+[EUZ020]+[EUZ021]+[EUZ022]+[EUZ023]+[EUZ024]+[EUZ025]
HISPANIC	Persons of Hispanic Origin - SF1 - [EU0001]
WHITE_NH	Persons Not of Hispanic origin >> White - SF1 - [ET2001]
MINORITY	"Minority Population" or Population that is not white (note: Minority is not a Census Bureau term) - SF1 - [POP1990]-[WHITE_NH]
AGE_UNDER5	Persons Under 5 years - SF1 - [ET3001]+[ET3002]+[ET3003]
AGE_5_17	Persons 5 years to 17 years - F1 - [ET3004]+[ET3005]+[ET3006]+[ET3007]+[ET3008]+[ET3009]+[ET3010]+[ET3011]+[ET3012]
AGE_18_21	Persons 18 years to 21 years - SF1 - [ET3013]+[ET3014]+[ET3015]+[ET3016]
AGE_22_29	Persons 22 to 29 years - SF1 - [ET3017]+[ET3018]
AGE_30_39	Persons 30 to 39 years - SF1 - [ET3019]+[ET3020]
AGE_40_49	Persons 40 to 49 years - SF1 - [ET3021]+[ET3022]
AGE_50_64	Persons 50 to 64 years - SF1 - [ET3023]+[ET3024]+[ET3025]+[ET3026]
AGE_65_UP	Persons 65 years and over - SF1 - [ET3027]+[ET3028]+[ET3029]+[ET3030]+[ET3031]
POP18	Persons 18 and up - SF1 - [AGE_18_21]+[AGE_22_29]+[AGE_30_39]+[AGE_40_49]+[AGE_50_64]+[AGE_65_UP]
POPUNDER18	Persons under 18 - SF1 - [AGE_UNDER5]+[AGE_5_17]
POP25	Persons 25 and up - SF1 - [ET3018]+[AGE_30_39]+[AGE_40_49]+[AGE_50_64]+[AGE_65_UP]
HSE_UNITS	Housing units Total - SF1 - [ESA001]
OCCUPIED	Housing units Occupied - SF1 - [ESN001]
VACANT	Housing units Vacant - SF1 - [ESN002]
OWNER	Occupied housing units - Owner occupied - SF1 - [ES1001]
RENTER	Occupied housing units - Renter occupied - SF1 - [ES1002]
HS_PER_AC	Housing units per acre - SF1 - [HSE_UNITS]/[ACRES]
H1DETACH	Occupied housing units Owner or Renter occupied >> 1, detached - SF1 - [ETJ001]+[ETJ011]
H1ATTACH	Occupied housing units Owner or Renter occupied >> 1, attached - SF1 - [ETJ002]+[ETJ012]
H2UNIT	Occupied housing units Owner or Renter occupied >> 2 - SF1 - [ETJ003]+[ETJ013]
H3_4UNIT	Occupied housing units Owner or Renter occupied >> 3 or 4 - SF1 - [ETJ004]+[ETJ014]
H5_9UNIT	Occupied housing units Owner or Renter occupied >> 5 to 9 - SF1 - [ETJ005]+[ETJ015]
H10_19UNIT	Occupied housing units Owner or Renter occupied >> 10 to 19 - SF1 - [ETJ006]+[ETJ016]
H20_49UNIT	Occupied housing units Owner or Renter occupied >> 20 to 49 - SF1 - [ETJ007]+[ETJ017]
H50MORE	Occupied housing units Owner or Renter occupied >> 50 or more - SF1 - [ETJ008]+[ETJ018]
HMOBILE	Occupied housing units Owner or Renter occupied >> Mobile home or trailer - SF1 - [ETJ009]+[ETJ019]
HOTHER	Occupied housing units Owner or Renter occupied >> Other - SF1 - [ETJ010]+[ETJ020]
H_SF	Single Family housing units Owner or Renter occupied (1 detached or 1 attached unit - does not include mobile homes) - SF1 - [H1DETACH]+[H1ATTACH
H_MF	Multi Family housing units Owner or Renter occupied. - SF1 - [H2UNIT]+[H3_4UNIT]+[H5_9UNIT]+[H10_19UNIT]+[H20_49UNIT]+[H50MORE]
PH_TOTAL	Total persons in Households - Sum of all - SF1 - [ET7001]+[ET7002]+[ET7003]+[ET7004]+[ET7005]+[ET7006]+[ET7007]+[ET7008]+[ET7009]+[ET7010]+[ET7011]+[ET7012]
PH_FAM	Persons in Family Households - SF1 - [ET7001]+[ET7002]+[ET7003]+[ET7004]+[ET7005]+[ET7006]+[ET7007]
PH_NONFAM	Persons in nonfamily households (includes group quarters: Institutionalized, Other, Count Adjustment) - SF1 - [ET7008]+[ET7009]+[ET7010]+[ET7011]+[ET7012]
FAM_HH	Number of Family Households - SF1 - [ET8003]+[ET8004]+[ET8005]+[ET8006]+[ET8007]+[ET8008]
AVE_HH_SZ	Average Household size (Total Population In Households/Universe: Households) - SF1 - [PH_TOTAL]/[HOUSEHOLDS]
AVE_FAM_SZ	Average family size (Total Population In family households/Family households) - SF1 - [PH_FAM]/[FAM_HH]
POP1990SF3	Total Persons - SF3 - [E0H001]
SAMPLE_POP	Unweighted Sample Count of Persons - SF3 - [E2X001]
ENROLLED	Persons 3 years and over Enrolled in preprimary school: Public or Private elementary, high school, or college - SF3 - [E30001]+[E30002]+[E30003]+[E30004]+[E30005]+[E30006]
NOT_ENROLD	Persons 3 years and over Not enrolled in school - SF3 - [E30007]
BACHELORS	Educational Attainment Persons 25 years and over - Bachelor's degree - SF3 - [E33006]
HSGRAD	Educational Attainment Persons 25 years and over - High school graduate (includes equivalency),Some college, no degree,Associate degree,Bachelor's degree, Graduate or professional degree - SF3 - [E33003]+[E33004]+[E33005]+[E33006]+[E33007]
MILITARY	Persons 16 years and over Male or Female >> In Armed Forces - SF3 - [E4B001]+[E4B004]+[E4B007]+[E4B010]
LABOR_E	Sex by Age by Work Disability Status and Employment Status Civilian noninstitutionalized persons 16 years and over With a work disability and No work disability: In labor force: Employed - SF3 - [E4D001]+[E4D008]+[E4D015]+[E4D022]+[E4D005]+[E4D012]+[E4D019]+[E4D026]
LABOR_UE	Sex by Age by Work Disability Status and Employment Status Civilian noninstitutionalized persons 16 years and over With a work disability and No work disability: In labor force: Unemployed - SF3 - [E4D002]+[E4D009]+[E4D016]+[E4D023]+[E4D006]+[E4D013]+[E4D020]+[E4D027]
LABORERS	Total in labor force - Civilian (Employed and Unemployed) and Armed Forces - SF3 - [MILITARY]+[LABOR_E]+[LABOR_UE]
ITOTAL	Total number of households - Sum of all income fields - SF3 - [E4T001]+[E4T002]+[E4T003]+[E4T004]+[E4T005]+[E4T006]+[E4T007]+[E4T008]+[E4T009]+[E4T010]+[E4T011]+[E4T012]+[E4T013]+[E4T014]+[E4T015]+[E4T016]+[E4T017]+[E4T018]+[E4T019]+[E4T020]+[E4T021]+[E4T022]+[E4T023]+[E4T024]+[E4T025]
LESS_10K	Number of Households with Household Income in 1989 Less than $5,000 + $5,000 to $9,999 - SF3 - [E4T001]+[E4T002]
I10K_14K	Number of Households with Household Income in 1989 $10,000 to $12,499 + $12,500 to $14,999 - SF3 - [E4T003]+[E4T004]
I15K_19K	Number of Households with Household Income in 1989 $15,000 to $17,499 + $17,500 to $19,999 - SF3 - [E4T005]+[E4T006]
I20K_24K	Number of Households with Household Income in 1989 $20,000 to $22,499 + $22,500 to $24,999 - SF3 - [E4T007]+[E4T008]
I25K_29K	Number of Households with Household Income in 1989 $25,000 to $27,499 + $27,500 to $29,999 - SF3 - [E4T009]+[E4T010]
I30K_34K	Number of Households with Household Income in 1989 $30,000 to $32,499 + $32,500 to $34,999 - SF3 - [E4T011]+[E4T012]
I35K_39K	Number of Households with Household Income in 1989 $35,000 to $37,499 + $37,500 to $39,999 - SF3 - [E4T013]+[E4T014]
I40K_44K	Number of Households with Household Income in 1989 $40,000 to $42,499 + $42,500 to $44,999 - SF3 - [E4T015]+[E4T016]
I45K_49K	Number of Households with Household Income in 1989 $45,000 to $47,499 + $47,500 to $49,999 - SF3 - [E4T017]+[E4T018]
I50K_59K	Number of Households with Household Income in 1989 $50,000 to $54,999 + $55,000 to $59,999 - SF3 - [E4T019]+[E4T020]
I60K_74K	Number of Households with Household Income in 1989 $60,000 to $74,999 - SF3 - [E4T021]
I75K_99K	Number of Households with Household Income in 1989 $75,000 to $99,999 - SF3 - [E4T022]
I100K_124K	Number of Households with Household Income in 1989 $100,000 to $124,999 - SF3 - [E4T023]
I125K_149K	Number of Households with Household Income in 1989 $125,000 to $149,999 - SF3 - [E4T024]
I150KMORE	Number of Households with Household Income in 1989 $150,000 or more - SF3 - [E4T025]
MEDHHINC	Median household income in 1989 - SF3 - [E4U001]
HH_PUBA	Households With public assistance income - SF3 - [E5A001]
HH_NOPUBA	Households No public assistance income - SF3 - [E5A002]
MEDFINCOME	Median family income in 1989 - SF3 - [E0R001]
ABVE_POV	Number of persons with Income in 1989 above poverty level - SF3 - [E07001]+[E07002]+[E07003]+[E07004]+[E07005]+[E07006]+[E07007]+[E07008]+[E07009]+[E07010]+[E07011]+[E07012]
BELOW_POV	Number of persons with Income in 1989 below poverty level - SF3 - [E07013]+[E07014]+[E07015]+[E07016]+[E07017]+[E07018]+[E07019]+[E07020]+[E07021]+[E07022]+[E07023]+[E07024]
ABVE_BELW	Number of persons with Income in 1989 above and below poverty level - SF3 - [ABVE_POV]+[BELOW_PO]
B_TOTAL	Housing units Total - Sum of all housing units built from fields - SF3 - [EXQ001]
B89_90	Housing units built from 1989 to March 1990 - SF3 - [EX7001]
B85_88	Housing units built from 1985 to 1988 - SF3 - [EX7002]
B80_84	Housing units built from 1980 to 1984 - SF3 - [EX7003]
B70_79	Housing units built from 1970 to 1979 - SF3 - [EX7004]
B60_69	Housing units built from 1960 to 1969 - SF3 - [EX7005]
B50_59	Housing units built from 1950 to 1959 - SF3 - [EX7006]
B40_49	Housing units built from 1940 to 1949 - SF3 - [EX7007]
BEFORE39	Housing units built from 1939 or earlier - SF3 - [EX7008]
B80_90	Housing units built from 1980 to 1990 - SF3 - [B80_84]+[B85_88]+[B89_90]
B40_59	Housing units built from 1940 to 1959 - SF3 - [B40_49]+[B50_59]
B60_79	Housing units built from 1960 to 1979 - SF3 - [B60_69]+[B70_79]
BEFORE60	Housing units built from 1959 or earlier - SF3 - [BEFORE39]+[B40_59]
M89_90	Number of Occupied housing - householder moved into unit 1989 to March 1990 - SF3 - [EYB001]
M85_88	Number of Occupied housing - householder moved into unit 1985 to 1988 - SF3 - [EYB002]
M80_84	Number of Occupied housing - householder moved into unit 1980 to 1984 - SF3 - [EYB003]
M70_79	Number of Occupied housing - householder moved into unit 1970 to 1979 - SF3 - [EYB004]
M60_69	Number of Occupied housing - householder moved into unit 1960 to 1969 - SF3 - [EYB005]
M59BEFORE	Number of Occupied housing - householder moved into unit 1959 or earlier - SF3 - [EYB006]
OWN85_90	Owner occupied housing units, moved into unit >> 1989 to March 1990 + 1985 to 1988 - SF3 - [EYC001]+[EYC002]
RENT85_90	Renter occupied housing units, moved into unit >> 1989 to March 1990 + 1985 to 1988 - SF3 - [EYC007]+[EYC008]
VEHICLE_T	Total Occupied housing units - Sum of all vehicle fields - SF3 - [EYL001]+[EYL002]+[EYL003]+[EYL004]+[EYL005]+[EYL006]+[EYL007]+[EYL008]+[EYL009]+[EYL010]+[EYL011]+[EYL012]
VEHICLE_0	Occupied housing units >> None Vehicles Available - SF3 - [EYL001]+[EYL007]
VEHICLE_1	Occupied housing units >> 1 Vehicles Available - SF3 - [EYL002]+[EYL008]
VEHICLE_2	Occupied housing units >> 2 Vehicles Available - SF3 - [EYL003]+[EYL009]
VEHICLE_3	Occupied housing units >> 3 Vehicles Available - SF3 - [EYL004]+[EYL010]
VEHICLE_4	Occupied housing units >> 4 Vehicles Available - SF3 - [EYL005]+[EYL011]
VEHICLE5GR	Occupied housing units >> 5 or more Vehicles Available - SF3 - [EYL006]+[EYL012]
MEDOOHVAL	Median value Specified owner-occupied housing units - SF3 - [EZI001]
S_TOTAL	Age by Language Spoken at Home and Ability to Speak English Persons 5 years and over - SF3 - [E26001]+[E26002]+[E26003]+[E26004]+[E26005]+[E26006]+[E26007]+[E26008]+[E26009]+[E26010]+[E26011]+[E26012]+[E26013]+[E26014]+[E26015]+[E26016]+[E26017]+[E26018]+[E26019]+[E26020]+[E26021]+[E26022]+[E26023]+[E26024]+[E26025]+[E26026]+[E26027]+[E26028]+[E26029]+[E26030]
S_ENGLISH	Age by Language Spoken at Home and Ability to Speak English Persons 5 years and over - Speak only English - SF3 - [E26001]+[E26011]+[E26021]
S_VERYWELL	Age by Language Spoken at Home and Ability to Speak English Persons 5 years and over - Speak Spanish or Asian or Pacific Island language or Speak other language: Speak English "very well" - SF3 - [E26002]+[E26012]+[E26022]+[E26005]+[E26015]+[E26025]+[E26008]+[E26018]+[E26028]
S_WELL	Age by Language Spoken at Home and Ability to Speak English Persons 5 years and over - Speak Spanish or Asian or Pacific Island language or Speak other language: Speak English "well" - SF3 - [E26003]+[E26013]+[E26023]+[E26006]+[E26016]+[E26026]+[E26009]+[E26019]+[E26029]
S_NOT	Age by Language Spoken at Home and Ability to Speak English Persons 5 years and over - Speak Spanish or Asian or Pacific Island language or Speak other language: Speak English "not well" or "not at all" - SF3 - [E26004]+[E26014]+[E26024]+[E26007]+[E26017]+[E26027]+[E26010]+[E26020]+[E26030]
TRAN_TOTAL	Means of Transportation to Work Workers 16 years and over - Sum of all transportation fields - SF3 - [E3U001]+[E3U002]+[E3U003]+[E3U004]+[E3U005]+[E3U006]+[E3U007]+[E3U008]+[E3U009]+[E3U010]+[E3U011]+[E3U012]+[E3U013]
TRAN_CAR	Means of Transportation to Work Workers 16 years and over - Car, truck, or van: Drove alone or Carpooled - SF3 - [E3U001]+[E3U002]
TRAN_PUB	Means of Transportation to Work Workers 16 years and over - Public transportation: Bus or trolley bus, Streetcar or trolley car, Subway or elevated, Railroad, Ferryboat, Taxicab - SF3 - [E3U003]+[E3U004]+[E3U005]+[E3U006]+[E3U007]+[E3U008]
TRAN_MOTO	Means of Transportation to Work Workers 16 years and over - Motorcycle - SF3 - [E3U009]
TRAN_BIKE	Means of Transportation to Work Workers 16 years and over - Bicycle - SF3 - [E3U010]
TRAN_WALK	Means of Transportation to Work Workers 16 years and over - Walked - SF3 - [E3U011]
TRAN_OTHER	Means of Transportation to Work Workers 16 years and over - Other means - SF3 - [E3U012]
TRAN_HOME	Means of Transportation to Work Workers 16 years and over - Worked at home - SF3 - [E3U013]
PCTMNRTY	Percent minority - SF3 - ([MINORITY]/[POP1990]* 100)
PCT_POV	Percent below poverty - SF3 - ([BELOW_POV]/[ABVE_BELW]* 100)
PCT_BACHLR	Percent over 25 with Bachelor's degree - SF3 - ([BACHELORS]/[POP1990SF3]* 100)
PCT_NOT	Percent Persons 5 years and over Speak English "not well" or "not at all" - SF3 - ([S_NOT]/[S_TOTAL])* 100)
FGDLAQDATE	Date GeoPlan acquired data from source.
AUTOID	Unique ID added by GeoPlan
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:

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).

Block groups (BGs) are the next level above census blocks in the geographic hierarchy (see Figure 2-1 in Chapter 2). A BG is a combination of census blocks that is a subdivision of a census tract or block numbering area (BNA). (A county or its statistically equivalent entity contains either census tracts or BNAs; it can not contain both.) A BG consists of all census blocks whose numbers begin with the same digit in a given census tract or BNA; for example, BG 3 includes all census blocks numbered in the 300s. The BG is the smallest geographic entity for which the decennial census tabulates and publishes sample data. (P 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 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

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 different dates: The shapefile was downloaded on 3/19/2012 The attribute data was downloaded in 7 different installments from 3/19/2012 - 3/26/2012 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. A python script was run using ArcGIS Desktop 9.3.1 in order to process fields. Fields were concatenate when necessary and rename to human readable format. When possible, fields were renamed to match existing FGDL field names for 2000 and 2010 census block group data. -Added FGDLAQDATE based on date data was retrieved from source. -Renamed from FL_blck_grp_1990 to CENBLKGRP1990 Process Date: 20120326

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
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: 

      Technical Support:	        http://www.fgdl.org/fgdlfeed.html
      FGDL Frequently Asked Questions:  http://www.fgdl.org/fgdlfaq.html
      FGDL Mailing Lists:		http://www.fgdl.org/fgdl-l.html
      For FGDL Software:                http://www.fgdl.org/software.html