December 1995

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Source

This datalayer was produced from the post-census release of 1990 TIGER/Line files for the fourteen counties of Massachusetts. This datalayer includes the boundaries of all census blocks and can therefore be used in conjunction with Census Bureau data summarized at the census block level--the finest available resolution of census data.

The layer is named CENSUS1990TIGER_ARC.

Production

Using ArcInfo Workstation, the Census Block data (in coverage format) were created by extracting from county TIGER files all linework, line attributes, and polygon attributes. The coverages were enhanced by dropping redundant data items, appending several demographic data items from the STF-1, STF-3a, and PL94-171 census data matrices, and creating an Arc/INFO ADD file for address-matching. Each polygon in the original county TIGER file was assigned a MassGIS town-ID code, ensuring that all of the original polygons appear within the Town TIGER Geography datalayer.

Attributes

The layer's arc attribute table includes the following items:
Item Name Description
BLK90L TABULATION BLOCK NUMBER LEFT - 1990 CENSUS TIGER ITEM 'BLKL'
BLK90R TABULATION BLOCK NUMBER RIGHT - 1990 CENSUS TIGER ITEM 'BLKR'
CFCC CENSUS FEATURE CLASS CODE
CFCC1 CENSUS FEATURE CLASS CODE - MAJOR FEATURE TYPE; REDEFINED ITEM
CNT90LEFT FIPS COUNTY CODE LEFT - 1990 CENSUS TIGER ITEM 'COL'
CNT90RGT FIPS COUNTY CODE RIGHT - 1990 CENSUS TIGER ITEM 'COR'
CTBNA90L CENSUS TRACT/BNA CODE LEFT - 1990 CENSUS TIGER ITEM CTBNAL
CTBNA90R CENSUS TRACT/BNA CODE RIGHT - 1990 CENSUS TIGER ITEM 'CTBNAR'
FDPRE FEATURE DIRECTION PREFIX; TIGER ITEM 'DIRPRE'
FDSUF FEATURE DIRECTION SUFFIX; TIGER ITEM 'DIRSUF'
FMCDCCD90L FIPS 55 CODE LEFT (MDC/CCD) - 1990 CENSUS TIGER ITEM 'FMCDL'
FCDCCD90R FIPS 55 CODE RIGHT (MDC/CCD) - 1990 CENSUS TIGER ITEM 'FMCDR'
FNAME FEATURE NAME; TIGER ITEM 'FEANME'
FPLACO90L PLACE CENSUS CODE LEFT; TIGER ITEM 'PLCDEL'
FPLACO90R PLACE CENSUS CODE RIGHT; TIGER ITEM 'PLCDER'
FROMLAT LATITUDE FROM (IMPLIED 6 DECIMAL PLACES)
FROMLONG LONGITUDE FROM (IMPLIED 6 DECIMAL PLACES)
FSUBMCD90L FIPS 55 CODE LEFT (SUB-MCD) - 1990 CENSUS TIGER ITEM 'FSMCDL'
FSUBMCD90R FIPS 55 CODE RIGHT (SUB-MCD) - 1990 CENSUS TIGER ITEM 'FSMCDR'
FTYPE FEATURE TYPE; TIGER ITEM 'FEATYP'
LEFTADD1 FROM ADDRESS LEFT; TIGER ITEM 'FRADDL'
LEFTADD2 TO ADDRESS LEFT; TIGER ITEM 'TOADDL'
LEFTFFL FROM IMPUTED ADDRESS FLAG LEFT; TIGER ITEM 'FRIADDFL'
LEFTTFL TO IMPUTED ADDRESS FLAG LEFT; TIGER ITEM 'TOIADDFL'
RECNUM CENSUS RECORD NUMBER (PERMANENT)
RGTADD1 FROM ADDRESS RIGHT; TIGER ITEM 'FRADDR'
RGTADD2 TO ADDRESS RIGHT; TIGER ITEM 'TOADDR'
RGTFFL FROM IMPUTED ADDRESS FLAG RIGHT; TIGER ITEM 'FRIADDFR'
RGTTFL TO IMPUTED ADDRESS FLAG RIGHT; TIGER ITEM 'TOIADDFR'
RT RECORD TYPE ( 1 = LINE SEGMENT)
SIDE SINGLE SIDE SEGMENT CODE (1 = DATA EXIST FOR ONLY ONE SIDE OF THE SEGMENT)
SOURCE SOURCE CODE
ST90LEFT FIPS STATE CODE LEFT - 1990 CENSUS TIGER ITEM 'STL'
ST90RGT FIPS STATE CODE RIGHT - 1990 CENSUS TIGER ITEM 'STR'
STREET STREET NAME; DERIVED FROM FNAME AND FTYPE
TILE_NAME TOWN ID
TOLAT LATITUDE TO (IMPLIED 6 DECIMAL PLACES)
TOLONG LONGITUDE TO (IMPLIED 6 DECIMAL PLACES)
VERSION VERSION NUMBER
ZIPCOLEF ZIP CODE LEFT (ONLY WHEN ADDRESS RANGE IS PRESENT); TIGER ITEM 'ZIPL'
ZIPCORGT ZIP CODE RIGHT (ONLY WHEN ADDRESS RANGE IS PRESENT); TIGER ITEM 'ZIPR'


Other Census Metadata


Last Updated 6/18/2012