TIGER/Line(TM) Files, 1992 Table of Contents Acknowledgments Table of Contents Introduction Type of File and Geographic Extent.........................i-1 Principal Differences Between the 1990 Census TIGER/Line Files and the 1992 TIGER/Line Files..................i-1 New Record Types Added..................................i-2 Boundary and Area Changes...............................i-2 Previously Blank Fields Filled..........................i-2 New Address Ranges and ZIP Codes(R).....................i-2 File Availability..........................................i-3 How to Use This Documentation..............................i-3 Figure I-1 -- TIGER/Line (TM) Census Files, 1990 Address Range Coverage..................................i-5 Figure I-2 -- TIGER/Line (TM) Files, 1992 Residential Address Coverage....................i-6 Chapter 1: An Overview and Geographic Concepts Overview.......................................................1-1 What is TIGER?.............................................1-1 TIGER Data Base Extracts...................................1-2 Relationship of TIGER/Line(TM) to 1990 Census Statistical Data.......................................1-2 Related Files..............................................1-2 County-Based Files.........................................1-3 The Data Content of the TIGER/Line(TM) Files...............1-3 Topology and Spatial Objects in the TIGER/Line(TM) Files.......1-4 Spatial Objects in the TIGER/Line(TM) Files................1-4 Topology...................................................1-4 Terminology................................................1-5 Features...................................................1-6 Left- and Right-Side Data Fields...........................1-6 Single-Layer Topology......................................1-7 Introduction to the TIGER/Line(TM) File Structure..............1-7 Basics.....................................................1-7 Description of the TIGER/Line(TM) 1992 Record Types............1-7 Record Type 1 -- Basic Data Record for Complete Chains.....1-7 Record Type 2 -- Shape Point Coordinates...................1-8 Record Type 3 -- Additional 1990 and 1980 Decennial Census Geographic Entity Codes.............................1-8 Record Type 4 -- Index to Alternate Feature Identifiers....1-8 Record Type 5 -- Feature Identifier List...................1-8 Record Type 6 -- Additional Address Range and ZIP Code(R) Data................................................1-8 Record Type 7 -- Landmark Features.........................1-8 Record Type 8 -- Polygons Linked to Area Landmarks.........1-9 Record Type A -- Additional Polygon Geographic Entity Codes........................................1-9 Record Type F -- Corrected Geographic Entity Codes for the 1990 Census.................................1-9 Record Type G -- 1992 Geographic Codes and Entity Changes..1-9 Record Type I -- The Link Between Complete Chains and Polygons........................................1-9 Record Type P -- Polygon Internal Point....................1-9 Record Type R -- Record Number Range.......................1-10 The Relationship Between Spatial Objects and TIGER/Line(TM) Record Types...........................................1-10 Linkages Between Record Types..............................1-10 Figure 1-1 -- Basic TIGER/Line(TM) File Topology...........1-11 Figure 1-2 -- TIGER/Line(TM) File Record Linkages..........1-12 Chapter 2: Version Code and Record Identification Numbers Version Code...............................................2-1 Identification..........................................2-1 Codes: Version Code....................................2-1 TIGER/Line Identification Number (TLID)....................2-1 Identification..........................................2-1 Codes: TLID............................................2-1 Record Locations: TLID.................................2-2 Record Linkages: TLID..................................2-2 Sort Sequence: TLID....................................2-2 User Defined Changes to the 1992 TIGER/Line Files..........2-2 TLID as a Standard Identification Number................2-2 Feature Changes.........................................2-3 TIGER/Line (TM) Polygon Identification Numbers (CENID and POLYID)..................................2-3 Identification..........................................2-3 CENID...................................................2-3 POLYID..................................................2-3 Codes: CENID and POLYID...................................2-4 CENID...................................................2-4 POLYID..................................................2-4 Record Locations: CENID and POLYID.....................2-4 Record Linkages: CENID and POLYID......................2-5 Sort Sequence: CENID and POLYID........................2-5 TIGER/Line(TM) Landmark Identification Numbers (LAND)......2-6 Identification..........................................2-6 Codes: LAND............................................2-6 Record Locations: LAND.................................2-6 Record Linkages: LAND..................................2-6 Sort Sequence: LAND....................................2-6 Chapter 3: Geographic Objects in the TIGER/Line(TM) File Line Features..............................................3-1 Feature Identifiers.....................................3-1 Identification......................................3-1 Record Locations: Feature Identifiers..............3-3 Codes: Feature Identifier..........................3-3 Directionals (Prefix and Suffix).................3-3 Feature Names....................................3-3 Feature Types....................................3-4 Standard Feature Types.......................3-4 Data Limitations and Notes .............................3-5 Corporate Corridors and Corporate Offset Boundaries.....3-5 Feature Identifier Record Linkage.......................3-5 Concepts............................................3-5 Record Locations: Feature Identification Numbers...3-6 Codes: Feature Identification Numbers..............3-6 Address Ranges and ZIP Codes(R)............................3-6 Identification..........................................3-6 Address Ranges......................................3-7 Imputed Address Ranges..............................3-9 ZIP Codes(R)........................................3-10 Address Information Methodology.........................3-10 Pre-1990 Census Address Ranges......................3-10 Expanded Addresses..................................3-11 The Relationship Between Pre-existing and ACF Address Ranges................................3-11 Record Locations: Address Ranges...................3-12 Record Locations: Impute Flags.....................3-12 Record Locations: ZIP Codes(R).....................3-12 Codes: Address Ranges and Impute Flags.................3-12 Address Ranges......................................3-12 Impute Flags/Source Flags...........................3-13 ZIP Codes(R)........................................3-13 Limitations.............................................3-13 Corporate Corridors and Corporate Limit Offset Boundaries........................................3-13 Record Linkages.........................................3-14 Boundaries of Geographic Entities..........................3-14 Identification..........................................3-14 Record Linkages and Boundary Extraction.................3-14 Single-Side Flags and County Boundaries.................3-15 Record Locations: Single-Side Flag.....................3-16 Codes: Single-Side Flag................................3-16 CFCC's.....................................................3-16 Identification..........................................3-16 Record Location: CFCC..................................3-16 Codes: CFCC's..........................................3-16 CFCC's Used for Both Complete Chains and Landmarks......3-17 Points Describing the Complete Chain.......................3-17 Identification..........................................3-17 Nodes...................................................3-17 Shape Points............................................3-17 Coordinates for Nodes and Shape Points..................3-18 Record Locations: Coordinates for Nodes and Shape Points......................................3-18 Values: Coordinates....................................3-19 Record Linkages/Feature Chaining........................3-19 Polygons...................................................3-20 Overview of Polygon Features............................3-20 Description.........................................3-20 Geographic Entity Codes.................................3-21 Identification......................................3-21 Internal Points.........................................3-21 Identification......................................3-21 Coordinate Notation.................................3-21 Record Locations: GT-Polygon Internal Point Coordinates........................... .......3-22 Values: Coordinates................................3-22 Record Linkages.........................................3-22 Description.........................................3-22 Landmark Features..........................................3-23 Overview of Landmark Features...........................3-23 Description.........................................3-23 Point, Line, and Area Landmark CFCC's...................3-24 Identification......................................3-24 Record Locations: Landmark CFCC's..................3-24 Codes: Landmark CFCC's.............................3-24 Landmark Feature Name...................................3-26 Identification......................................3-26 Record Locations: Landmark Feature.................3-26 Codes: Landmark Feature Names......................3-27 Point Landmark Locations................................3-27 Identification......................................3-27 Coordinates.........................................3-27 Record Locations: Point Landmark Location Point Coordinates................................3-27 Values: Coordinates................................3-27 Area Landmark Locations.................................3-27 Identification......................................3-27 Figure 3-1 -- TIGER/Line(TM) Address Range Basics..........3-29 Figure 3-2 -- TIGER/Line(TM) Multiple and Mixed Parity Address Ranges...................................3-30 Figure 3-3 -- Address Range Special Cases..................3-31 Figure 3-4 -- TIGER/Line(TM) Address Range Imputes.........3-32 Chapter 4: Geographic Entities OVERVIEW...................................................4-1 Introduction............................................4-1 Boundary and Area Changes...............................4-1 Codes for Entities......................................4-2 GEOGRAPHIC ENTITIES........................................4-2 AI/ANA's................................................4-2 Identification......................................4-2 Legal Entities...................................4-2 American Indian reservations (AIR's).........4-2 American Indian trust lands..................4-3 Statistical Entities.............................4-3 Alaska Native village statistical areas (ANVSA's)..............................4-3 Tribal designated statistical areas (TDSA's).4-3 Tribal jurisdiction statistical areas (TJSA's)...............................4-3 Record Location: AI/ANA Codes......................4-4 Codes: AI/ANA's....................................4-4 ANRC's..................................................4-4 Identification......................................4-4 Record Locations: ANRC Codes.......................4-4 Codes: ANRC's......................................4-4 Block Groups (BG's).....................................4-5 Identification......................................4-5 Geographic BG's..................................4-5 Tabulation BG's..................................4-5 Record Locations: BG Numbers.......................4-5 Codes: BG's........................................4-5 Census Blocks...........................................4-6 Identification......................................4-6 Census Block Numbers................................4-6 Water Blocks.....................................4-6 1980 Census Blocks...............................4-7 Corrected 1990 Block Numbers with a Second Suffix......................4-7 Current Geography................................4-8 Record Locations: Census Block Numbers.............4-8 Codes: Census Blocks...............................4-8 Tabulation block suffix..........................4-9 Correction block suffix for 1990 corrected geography...................4-9 Examples.........................................4-9 Census Tracts and BNA's.................................4-10 Identification......................................4-10 Census tracts....................................4-10 BNA's............................................4-10 Numbering........................................4-10 Boundaries and Boundary Changes..................4-11 Relationship to Other Geographic Entities........4-11 Record Locations: Census Tract/BNA Codes...........4-12 Codes: Census Tracts/BNA's.........................4-12 Counties and Statistically Equivalent Entities..........4-12 Identification......................................4-12 Record Locations: County and County Equivalents Codes.............................4-13 Codes: County and County Equivalents...............4-13 County Subdivisions.....................................4-14 Identification......................................4-14 Legal Entities...................................4-14 MCD's........................................4-14 Statistical Entities.............................4-14 CCD's........................................4-14 Census Subareas..............................4-15 UT's.........................................4-15 Record Locations: County Subdivision Codes.........4-16 Codes: County Subdivisions.........................4-16 Congressional District..................................4-16 Identification......................................4-16 Record Locations: Congressional Districts..........4-16 Codes: Congressional Districts.....................4-17 Crews-of-Vessels........................................4-17 Identification......................................4-17 Record Locations: Crews-of-Vessels.................4-18 Codes: Crews-of-Vessels............................4-18 Places..................................................4-18 Identification......................................4-18 Legal Entities...................................4-18 Incorporated Places..........................4-18 Consolidated City............................4-18 Statistical Entities.............................4-19 CDP's........................................4-19 Dependent and Independent Places.................4-19 Corporate Corridors and Offset Corporate Boundaries.......................4-19 Field Size.......................................4-20 Record Locations: Incorporated Place/CDP Codes.....4-20 Codes: Incorporated Places/CDP's...................4-20 School Districts........................................4-21 Identification......................................4-21 Record Locations: School District Codes............4-21 Codes: School Districts............................4-22 States and Statistically Equivalent Entities............4-22 Identification......................................4-22 Record Locations: State Codes......................4-23 Codes: States......................................4-23 Sub-MCD's...............................................4-23 Identification......................................4-23 Record Locations: Sub-MCD Codes....................4-24 Codes: Sub-MCD's...................................4-24 Traffic Analysis Zone (TAZ).............................4-24 Identification......................................4-24 Record Locations: TAZ Codes........................4-24 Codes: TAZ's.......................................4-24 Urbanized Areas (UA's)..................................4-24 Identification......................................4-24 Record Locations: UA Codes.........................4-25 Codes: UA's........................................4-25 Urban/Rural Designation (U/R)...........................4-25 Identification......................................4-25 Record Locations: U/R Flags........................4-26 Codes: U/R Flags...................................4-26 Voting Districts (VTD's)................................4-26 Identification......................................4-26 Record Locations: VTD Codes........................4-27 Codes: VTD's.......................................4-27 Figure 4-1 -- Hierarchical Relationships of Geographic Entities in the TIGER/Line Files.............4-28 Figure 4-2 -- Geographic Relationships -- Small Area Statistical Entities.........................4-29 Figure 4-3 -- Geographic Relationships -- Legal and Statistical Entities.........................4-30 Figure 4-4 -- Corporate Corridors: Overview...................4-31 Figure 4-5 -- Corporate Corridors: Detail View................4-32 Chapter 5: Data Quality Introduction...............................................5-1 Lineage....................................................5-1 Geometric Properties....................................5-1 Address Ranges and ZIP Codes(R).........................5-2 Source Codes............................................5-2 Record Locations: Source Codes.........................5-3 Positional Accuracy........................................5-3 General.................................................5-3 Attribute Accuracy.........................................5-3 Geometric Properties....................................5-3 Boundaries and Geographic Entity Codes..................5-4 Address Ranges and ZIP Codes(R).........................5-5 Logical Consistency........................................5-5 General.................................................5-5 Completeness...............................................5-6 General.................................................5-6 Chapter 6: The 1992 TIGER/Line Files Data Dictionary Record Type 1 -- Basic Data Record for Complete Chains....6-1 Record Type 2 -- Shape Point Coordinates..................6-4 Record Type 3 -- Additional 1990 and 1980 Decennial Census Geographic Entity Codes...............6-6 Record Type 4 -- Index to Alternate Feature Identifiers...6-8 Record Type 5 -- Feature Identifier List..................6-9 Record Type 6 -- Additional Address Range and ZIP Code(R) Data.............................6-10 Record Type 7 -- Landmark Features........................6-11 Record Type 8 -- Polygons Linked to Area Landmarks........6-12 Record Type A -- Additional Polygon Geographic Entity Codes.................................6-13 Record Type F -- Corrected Geographic Area Codes for the 1990 Census..........................6-15 Record Type G -- 1992 Geographic Codes and Entity Changes...............................6-16 Record Type I -- The Link Between Complete Chains and Polygons.................................6-17 Record Type P -- Polygon Internal Point...................6-18 Record Type R -- Record Number Range......................6-19 Appendix A -- FIPS State and County Codes Appendix B -- SDTS Definitions for Spatial Objects Appendix C -- 1992 TIGER/Line File, Field Name Changes Appendix D -- Standard Abbreviations Appendix E -- Census Feature Class Codes (CFCC) Appendix F -- Numbers of Decennial Census Geographic Entities Appendix G -- Urbanized Area Codes and Names Appendix H -- Source Codes Appendix I -- Acronyms and Abbreviations Bibliography Note: The page numbers in the table of contents refer only to the printed documentation. The page locations of the text or Word Perfect versions of the documentation may vary. Note: the text version of the documentation will not reflect all of the document formating in the printed document.