README file for PLBlock-shp.zip file.

This is the README file for the Bay Area Census 2000 block-level
ArcView "shp" file with selected variables from the Census 2000
PL 94-171 data file released 3/29/01. This block level GIS file
was created April 5, 2001 by MTC staff.

These "shp" files require ArcView 3.x to use.

This GIS layer is projected in UTM, Zone 10N, North American Datum.

Questions on this data file can be directed to Chuck Purvis of MTC, at
510-464-7731, or cpurvis@mtc.ca.gov.

April 13, 2001
_______________________________________________________________________________
Variable Name	Variable Description
=============   ===============================================================
Stfid           Identification code, used in spatial join
                   State+County+Tract+Block, string variable
First_fips      State+County FIPS code
First_tract     Census Tract
First_block     Census Block
Arealand        Land area in square meters
Areawatr        Water area in square meters
Popsingler      Population of a single race alone
White           White alone (includes hispanic/latino)
Black           Black/African American alone (includes hispanic/latino)
Amerind         American Indian/Alaskan Native alone (includes hispanic/latino)
Asian           Asian alone (includes hispanic/latino)
Hawaiipi        Hawaiian/Pacific Islander alone (includes hispanic/latino)
Other           Other alone (includes hispanic/latino)
Pop_multi       Two-or-more race (includes hispanic/latino)
Pop_tworac      Two-race (includes hispanic/latino)
Hispanic        Hispanic, any race
Nh_white        White alone, non-hispanic
Nh_black        Black/African American alone, non-hispanic
Nh_amerin       American Indian/Alaskan Native alone, non-hispanic
Nh_asian        Asian alone, non-hispanic
Nh_hawaiip      Hawaiian/Pacific Islander alone, non-hispanic
Nh_other        Other alone, non-hispanic
Nh_multi        Two-or-more race, non-hispanic
Land_sqmi       Land area in square miles (sq meters / 2589988)
Water_sqmi      Water area in square miles (sq meters / 2589988)
Total_pop       Total Population, Census 2000
Pop_densit      Population Density (Total_pop / Land_sqmi)
Nhwhite_sh      Share of white alone, non-hispanic
Nhblack_sh      Share of black/afr amer alone, non-hispanic
Nhother_sh      Share of AIAN + Other + 2+ race alone, non-hispanic      
Nhapi_shr       Share of Asian or Hawaiian/PI alone, non-hispanic
Hisp_shr        Share of hispanic, any race
Diversity       Diversity index based on the above five shares
State2          State FIPS Code (6=California)
County2         County FIPS Code
Place2          Place FIPS Code
Tract2          Census Tract
Blockgroup      Block group
Block2          Block
Taz_ctpp        Travel Analysis Zone for the Census Transportation Planning Package (CTPP)
Taz1099         Travel Analysis Zone, MTC's 1099 zone system

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