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Overview
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
- What MassGIS Provides
- Census 1990 Blocks
- Census 1990 Block Groups
- Census 1990 TIGER Linework
- Also see