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THE FOLLOWING IS THE ORIGINAL DATA DOCUMENTATION FROM ARIZONA LAND INFORMATION
SYSTEM (ALRIS), PHOENIX ARIZONA, CONTACT NAME: RON HUETTNER
ALRIS DATA DOCUMENTATION SEPTEMBER 1995 EDITED: 8/6/96 AT THE ADVANCED RESOURCE TECHNOLOGY LAB, THE UNIVERSITY OF ARIZONA, TUCSON, ARIZONA. NAME OF DATA SET: TRACTS DATA TYPE: Vector; Polygon DESCRIPTION OF CONTENT: This data set consists of the Census tracts for the State of Arizona. FORMAT: Arc/Info DATA SIZE: Data Set 7.5" quad Approximate Megabytes : 1.4 .001 HISTORY: Converted to ARC/INFO from the 1992 U.S. Census Bureau TIGER line files. The data were projected to UTM with a -3.2 million meter Northing offset and tiled by county into the TIGER library. NOTE: The data set distributed by the U of A has had the y-shift removed. MAINTENANCE: NONE PROJECTION: UTM (Zone 12 with -3.2 million meter Y shift(northing)) NOTE: The data set distributed by the U of A has had the y-shift removed. ITEMS: Item name: AREA Description: The value of each polygon in square meters Format: 4,12,F,3 Code table: Item name: PERIMETER Description: Perimeter of the polygon arcs in meters Format: 4,12,F,3 Code table: Item name: TRACTS# Description: This is a unique internally assigned identification number for each polygon Format: 4,5,B Code table: Item name: TRACTS-ID Description: User assigned identification number for each polygon Format: 4,5,B Code table: Item name: FC Description: FIPS County Identification number Format: 3,3,C Code table: Item name: CT Description: 1992 Census Tract identification number Format: 6,6,C Code table: REDEFINED ITEMS: Item name: TRACTS Alternate: FCCT Description: Redefined item which combines FC and CT to create a unique Tract number for each tract in the State Format: 9,9,C Code table: |
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