FLORIDA GEOGRAPHIC DATA LIBRARY DOCUMENTATION

TITLE: US CENSUS BLOCKS - 2010 (NO POPULATION STATISTICS)

Geodataset Name:       CENBLK2010
Geodataset Type:       SHAPEFILE
Geodataset Feature:    Polygon
Feature Count:         431965
GENERAL DESCRIPTION:
This dataset contains US Census Bureau 2010 block boundary data for the State of Florida. This data does not contain population information at this point. It is expected that the US Census Bureau will start releasing population statistics that can be joined to this linework sometime in 2011. The TIGER/Line Shapefiles are an extract of selected geographic and cartographic information from the Census MAF/TIGER database. The Census MAF/TIGER database represents a seamless national file with no overlaps or gaps between parts. However, each TIGER/Line Shapefile is designed to stand alone as an independent data set or the shapefiles can be combined to cover the whole nation.
DATA SOURCE(S):                    U.S. Census Bureau
SCALE OF ORIGINAL SOURCE MAPS:     Unknown
GEODATASET EXTENT:                 State of Florida
PUBLICATION DATE: 2009 TIME PERIOD OF CONTENT: Begin Date: 200901 End Date: 200905 DOWNLOAD LINK: http://www.fgdl.org/metadataexplorer/explorer.jsp

FEATURE ATTRIBUTE TABLES:

Datafile Name: CENBLK2010.DBF
ITEM NAME WIDTH TYPE
OBJECTID
4 OID
Shape
4 Geometry
STATEFP
2 String
STATENS
8 String
COUNTYFP
3 String
STATEFP00
2 String
COUNTYFP00
3 String
TRACTCE00
6 String
BLOCKCE00
4 String
SUFFIX1CE
1 String
BLKIDFP
17 String
NAME
11 String
MTFCC
5 String
UR
1 String
UACE
5 String
FUNCSTAT
1 String
ALAND
8 Double
AWATER
8 Double
INTPTLAT
11 String
INTPTLON
12 String
DESCRIPT
8 Double
FGDLAQDATE
36 Date
AUTOID
4 Integer
SHAPE.AREA
0 Double
SHAPE.LEN
0 Double

FEATURE ATTRIBUTE TABLES CODES AND VALUES:

Item
Item Description
OBJECTID Internal feature number.

Shape Feature geometry.

STATEFP Current state Federal Information Processing Standards (FIPS) code

STATENS Current state ANSI code

COUNTYFP Current county Federal Information Processing Standards (FIPS) code

STATEFP00 Census 2000 state Federal Information Processing Standards (FIPS) codes

COUNTYFP00 Census 2000 county Federal Information Processing Standards (FIPS) code

TRACTCE00 Census 2000 census tract code
000000 = Water tract in some coastal and Great Lakes water and territorial sea

000100 to 998999 = Census tract number


BLOCKCE00 Census 2000 tabulation block number
0001 to 9999 = tabulation block number


SUFFIX1CE Current census block suffix 1
A to Z = Current census block suffix 1


BLKIDFP Current block identifier; a concatenation of Census 2000 state Federal Information Processing Standards (FIPS) code, Census 2000 county FIPS code, Census 2000 census tract code, Census 2000 tabulation block number, and current block suffix 1.

NAME Current tabulation block name; a concatenation of 'Block', the current tabulation block number, and the block suffix 1

MTFCC MAF/TIGER feature class code
G5040 = Tabulation Block


UR Corrected Census 2000 urban/rural indicator
M = Mixed - part of the land area is classified as urban and part is classified as rural

N = Not Applicable (water-only and international areas)

R = Area is classified as rural

U = Area is classified as urban


UACE Corrected Census 2000 urban area code
00001 to 98999 = Urban Area Code


FUNCSTAT Current functional status
S = Statistical entity


ALAND Current land area

AWATER Current water area

INTPTLAT Current latitude of the internal point

INTPTLON Current longitude of the internal point

DESCRIPT GeoPlan added item that will be based on Total Population when it is released

FGDLAQDATE Date GeoPlan retreived data from source

AUTOID No description

SHAPE.AREA Area in meters

SHAPE.LEN Perimeter in meters


USER NOTES:
The Census Bureau performed automated tests to ensure logical consistency and 
limits of shapefiles.  Segments making up the outer and inner boundaries of a 
polygon tie end-to-end to completely enclose the area.  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 MAF/TIGER 
database.  Standard geographic codes, such as FIPS codes for states, counties, 
municipalities, county subdivisions, places, American Indian/Alaska Native/Native 
Hawaiian areas, and congressional districts 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 MAF/TIGER database 
files.  Most of the codes for geographic entities except states, counties, urban 
areas, Core Based Statistical Areas (CBSAs), American Indian Areas (AIAs), and 
congressional districts 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.
For the TIGER/Line Shapefiles, the Point and Vector Object Count for the 
G-polygon SDTS Point and Vector Object Type reflects the number of records in 
the shapefile attribute table.  For multi-polygon features, only one attribute record 
exists for each multi-polygon rather than one attribute record per individual 
G-polygon component of the multi-polygon feature.  TIGER/Line Shapefile 
multi-polygons are an exception to the G-polygon object type classification.  
Therefore, when multi-polygons exist in a shapefile, the object count will be less 

than the actual number of G-polygons.
Data completeness of the TIGER/Line Shapefiles reflects the contents of the 
Census MAF/TIGER database at the time the TIGER/Line Shapefiles were 
created.
GeoPlan relied on the integrity of the attribute information within
the original data.

In order for others to use the information in the Census MAF/TIGER database in a 
geographic information system (GIS) or for other geographic applications, the 
Census Bureau releases to the public extracts of the database in the form of 
TIGER/Line Shapefiles.

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

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

The TIGER/Line Shapefile products are not copyrighted however TIGER/Line 
and Census TIGER are registered trademarks of the U.S. Census Bureau.  These 
products are free to use in a product or publication, however acknowledgement 
must be given to the U.S. Census Bureau as the source.
The boundary information in the TIGER/Line Shapefiles 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 and they are not legal land 
descriptions. Coordinates in the TIGER/Line shapefiles have six implied decimal 
places, but the positional accuracy of these coordinates is not as great as the six 
decimal places suggest.

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:
TIGER/Line Shapefiles are extracted from the Census MAF/TIGER database by 
nation, state, county, and entity.  Census MAF/TIGER data for the nation, state, 
county, and entity are then distributed among 58 shapefiles each containing 
attributes for line, polygon, or landmark geographic data.
Process Date: 2009

The spatial portion of this data set was downloaded in November 2010. The data was downloaded in shapefile format from the following website: http://www2.census.gov/cgi-bin/shapefiles2009/state-files?state=12 The shapefile was in Decimal Degrees Nad 83 and was projected to Albers HPGN. -Added FGDLAQDATE field and populated based on the date source data was downloaded from source. -Added DESCRIPT field - did not populate because no population data at this point -Changed name from tl_2009_12_tabblock.shp to CENBLK2010.shp Process Date: 20101123
Data imported to ArcSDE and exported as a shapefile. Process Date: 20101206
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:
U.S. Census Bureau
MAF/TIGER
4600 Silver Hill Road, Stop 7400
Washington, DC
20233-7400
301-763-1128

http://www.census.gov/geo/www/tiger geo.tiger@census.gov

FGDL CONTACT:
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
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