HOW TO USE THIS FILE CONTENTS Introduction 2 1 Using the File 2 2 INTRODUCTION This chapter serves as a guide for data users to both the tape and the technical documentation. Novice users trying to understand how to use the documentation and the file should read this chapter first. For the 1990 Decennial Census of Population and Housing, the Census Bureau extended to the Commonwealth of Puerto Rico the opportunity to participate in Phase 2 of the Block Boundary Definition Project. This enabled officials in Puerto Rico to delineate voting districts (VTD's) by highlighting the VTD boundaries along the boundaries of census blocks and legal entities (municipios, barrios- pueblos/barrios, and subbarrios) shown on a set of the Census Bureau's precensus maps. The Census Bureau inserted the VTD boundaries and identifying codes into its geographic database so that it could tabulate data useful for redistricting based on these boundaries. The Census Bureau provided the Commonwealth with data and maps similar to those provided to States under Public Law 94-171. Documentation Chapters The Abstract chapter in this documentation provides a quick overview of the file, including the formal title, subject coverage, geographic coverage, and file availability. Also shown are citations for related electronic media and refer- ence materials, as well as purchasing information. The Subject Locator is an aid to finding which tables provide the information needed. The List of Tables (Matrices) and the Table (Matrix) Outlines provide two types of presentations for the tables available in the file. The List of Tables (Matrices) has the table titles and uni- verses. The Table (Matrix) Outlines offer a detailed pre- sentation of the tables. When reviewing the tables, re- member that a colon (:) following an entry indicates the entry is a heading, not a data cell. User and Technical Notes Information about file or documentation changes sometimes becomes available after the documentation has been printed. User notes inform the user commu-nity about these changes. These are issued in a numbered series. If there are technical documentation changes, revised pages usually accompany them. The revised pages should be inserted in their proper location, but the user note cover sheet should be filed in the User Notes chapter. Technical notes provide information for specific geography or summary levels. While they are not a part of the technical documentation, we suggest filing them in the documentation notebook. Please see the User Notes chapter for specific distribution information. Data Dictionary The Data Dictionary chapter describes the file and provides character locations for each variable and each table. It has two elements, the identification section and the table (matrix) section. Some of the field and reference names in the identification section are not applicable to the Puerto Rico data and usually are filled with 9's or 0's as appropriate. In the identification section, the components include the field name, the data dictionary reference name (a short mnemonic for use with software packages), field size, starting position, and data type (alphabetic, numeric, or alphanumeric). The identification section of the Data Dictionary chapter is identical for all 1990 summary files. It provides a list of the geographic codes or refers the user to the appropriate source. Review the footnotes carefully; they provide explanations for various terms. These footnotes are listed at the end of the identification section of the Data Dictionary chapter. The table (matrix) section provides information on the table (matrix) number, table (matrix) description, data dictionary reference name, field size, data type, and cell coordinates. Appendixes Detailed information on geographic areas is in appendix A, followed by subject-matter definitions in appendix B. Appendix C provides detailed statistical information about the data, while appendix D outlines the data collection and processing procedures. A facsimile of the 1990 census questionnaire for Puerto Rico is in appendix E. Appendix F furnishes detailed information on all the data products for Puerto Rico of the 1990 census, as well as suggested sources of information and assistance. Appendix G contains map information and samples. Appendix H provides CD-ROM specific technical information. USING THE FILE Field Names In Numeric Data Tables Fields in numeric data tables are named according to a convention which identifies the tables and the sequence of the data item within the table. The two data items in P2, for example, are identified as P0020001 and P0020002. The one data item in table H1 is identified as H0010001. Components Of The Field Name Character 1 P or H Character 2-4 Table number; right justified with leading zeroes Character 5 Sub-table letter; zero if not applicable Character 6-8 Item number; right justified with leading zeroes Record Identification The first 32 characters of each logical record provide record information. Because the identification information layout is identical for all 1990 census summary files, there are some fields that are not used on the Puerto Rico redistricting file and other fields that have identical coding on all records in this file. In the Puerto Rico redistricting file, the geographic component is always coded `00', the characteristic iteration is always coded `000', and both the logical record part number and total number of parts in record fields are coded `0001'. The logical record number is a record sequence number within the file. Summary Level Sequence Chart The Summary Level Sequence Chart chapter provides essential information for using the 1990 census Puerto Rico redistricting file. Remember that, for purposes of data presentation, the Census Bureau treats Puerto Rico as the statistical equivalent of a state and municipios as the statistical equivalent of counties. Barrios-pueblos or barrios are the statistical equivalent of county subdivisions. Some subdivisions (barrios-pueblos or barrios) are divided into sub-minor civil divisions called subbarrios. This chart identifies the geographic levels for which data are provided. It is easy to determine this if you remember that the last geographic area type listed in the sequence identifies the geography of the summary level; the prior codes simply define the hierarchy. For example, in summary level 140, the hierarchy listed is State county census tract/block numbering area (BNA). The record actually contains data for a census tract/BNA within a given county and State. When reading the Summary Level Sequence Chart, it is important to recognize that dashes ( ) separate the individual hierarchies while slashes (/) separate different types of geography within the same hierarchy. For example, State county census tract/BNA identifies a record hierarchy for a census tract or BNA within a county within a State. After identifying the summary level code, turn to chart 1 at the end of this chapter to determine which geographic area codes and area characteristics are provided on the tape for this summary level. Remember that an asterisk (*) indicates a code in that field. The code may be one of the standard codes described on page 2-3. Special Area Codes Special area codes appear in the geographic area codes portion of the Data Dictionary chapter on all 1990 census summary files. The codes represented may vary across files. In the Puerto Rico Redistricting Data file, there are four special area code fields used. These fields are Special Area Codes 3, 8, 9, and 10. The Special Area Code 3 field is used in summary levels 700, 710, 715, 720, 730, 735, 740, 745, 750, and 755. It contains the voting district code. The Special Area Code 8 field is used in summary levels 067, 715, 735, 745, and 755. It contains the subbarrio code. The Special Area Code 9 field, the land/water area field, appears in all summary levels. Codes are shown in the boxed area below. Special area code (9) Land/water area 1 Significant land, significant (0.0005 or more square kilometers) water 2 Significant land, minimal (less than 0.0005 square kilometer) water 3 Significant land, zero (0) water 4 Minimal land, significant water 5 Minimal land, minimal water 6 Minimal land, zero water 7 Zero land, significant water 8 Zero land, minimal water 9 Zero land, zero water (crews-of-vessels geography) The Special Area Code 10 field applies to summary levels 700, 710, 715, 720, 730, 735, 740, 745, 750, and 755. It is used as an identifier for approximated voting districts. See the section below on voting districts for a complete explanation. Standard Codes In the identification section of all 1990 summary files, there are standard codes, undefined in the Data Dictionary chapter, that have identical meaning regardless of the field. The codes are the same size as the field; that is, a three-character field will have three symbols. These standard codes are as follows: ! Not available The code would be shown, except that it has not been determined (for example, metropolitan area code on a county summary level (050)). 9 Not in This indicates a "remainder of" an area, such as a place code in the portion of a county subdivision not in a place, or the summary level is not part of any area to which the code field applies, such as a summary level that is not in a zona urbana . Blank Not applicable This indicates that the code is not applicable to the summary level. Voting Districts Actual Voting Districts The entities reported by the Commonwealth as representing these areas are referred to as "actual voting districts" regardless of their legal status or currency. They are identified in the file by an asterisk (*) appended to the voting district name in the Area Name/PSAD Term/Part Indicator field (position 192); in addition, an "A" (for "actual") is shown in Special Area Code 10 (position 171). Pseudo Voting Districts--The criteria for Phase 2 of the Block Boundary Definition Project required voting districts to follow census block boundaries. In many cases, the Commonwealth moved the actual voting district boundary, which did not follow a census block boundary, to coincide with a nearby block boundary for tabulation purposes only. The voting district was no longer "actual"; it was an ap- proximation, which is referred to as a "pseudo voting district." If there is no asterisk appended to the name, and a "P" (for "pseudo") appears in Special Area Code 10 (position 171), the Commonwealth participant approximated that voting district. Voting District Codes Voting districts are not specifi- cally identified in the identification section of the data dictionary. Voting district codes are found in the field identified as Special Area Code 3 (4 characters beginning in position 152). If a portion or pieces of a municipio were not allocated to a specific VTD code, they were aggregated into a single VTD identified with a code of ZZZZ. These VTD's were considered "pseudo." All other Puerto Rico codes are 4-digit numeric codes. Chart 1. Puerto Rico Redistricting File Identification by Summary Level1 Summary level Summary level Field name 040 050 060 067 140 160 700 710 Record Codes File Identification * * * * * * * * State/US Abbreviation (Puerto Rico only) * * * * * * * * Summary Level * * * * * * * * Geographic Component * * * * * * * * Characteristic Iteration * * * * * * * * Logical Record Number * * * * * * * * Logical Record Part Number * * * * * * * * Total Number of Parts in Record * * * * * * * * Geographic Area Codes Alaska Native Regional Corporation American Indian/ Alaska Native Area (Census) American Indian/Alaska Native Area (FIPS) American Indian/Alaska Native Area Class Code American Indian Reservation Trust Land Indicator Block Block Group Census Tract/Block Numbering Area * Congressional District Consolidated City (Census) * Consolidated City (FIPS) * Consolidated City Class Code * Consolidated City Size Code * Consolidated Metropolitan Statistical Area * * * * Municiplo (County) * * * * * * County Size Code * * * * * * County Subdivision (Barrio-pueblo or Barrio) (Census) * * * County Subdivision (FIPS) * * * County Subdivision Class Code * * * County Subdivision Size Code * * * Division * * * * * * * * Extended City Indicator * Internal Use Code Metropolitan Statistical Area/ Consolidated Metropolitan Statistical Area * * * * MSA/CMSA Size Code * * * * Place (Census) * Place (FIPS) * Place Class Code * 1See the Summary Level Sequence Chart chapter for identification of the summary level record numbers. Summary level Summary level 715 720 730 735 740 745 750 755 Field name Record Codes * * * * * * * * File Identification * * * * * * * * State/US Abbreviation (Puerto Rico only) * * * * * * * * Summary Level * * * * * * * * Geographic Component * * * * * * * * Characteristic Iteration * * * * * * * * Logical Record Number * * * * * * * * Logical Record Part Number * * * * * * * * Total Number of Parts in Record Geographic Area Codes * Alaska Native Regional Corporation * American Indian/Alaska Native Area (Census) * American Indian/Alaska Native Area (FIPS) * American Indian/Alaska Native Area Class Code * American Indian Reservation Trust Land Indicator * * Block * * * * Block Group * * * * * * Census Tract/Block Numbering Area * Congressional District * * * * * * * Consolidated City (Census) * * * * * * * Consolidated City (FIPS) * * * * * * * Consolidated City Class Code * * * * * * * Consolidated City Size Code Consolidated Metropolitan Statistical Area * * * * * * * * Municipio (County) * * * * * * * * County Size Code * * * * * * * * County Subdivision (Barrio-pueblo or Barrio) (Census) * * * * * * * * County Subdivision (FIPS) * * * * * * * * County Subdivision Class Code * * * * * * * * County Subdivision Size Code * * * * * * * * Division Extended City Indicator Internal Use Code Metropolitan Statistical Area/Consolidated Metropolitan Statistical Area MSA/CMSA Size Code * * * * * Place (Census) * * * * * Place (FIPS) * * * * * Place Class Code Chart 1. Puerto Rico Redistricting File Identification by Summary Level1-Con. Summary level Summary level Field name 040 050 060 067 140 160 700 710 Geographic Area Codes Con. Place Description Code * Place Size Code * Primary Metropolitan Statistical Area * * * * Region * * * * * * * * State (Census)2 * * * * * * * * State (FIPS) * * * * * * * * Urban/Rural Urbanized Area Urbanized Area Size Code Special Area Code (1) Special Area Code (2) Special Area Code (3) * * Special Area Code (4) Special Area Code (5) Special Area Code (6) Special Area Code (7) Special Area Code (8) * Special Area Code (9) * * * * * * * * Special Area Code (10) * * Area Characteristics Area (Land) * * * * * * * * Area (Water) * * * * * * * * Area Name/PSAD Term/ Part Indicator * * * * * * * * Functional Status Code * * * * * * * * Geographic Change User Note Indicator * * Housing Unit Count (100 percent) * * * * * * * * Internal Point (Latitude) * * * * * * * * Internal Point (Longitude) * * * * * * * * Part Flag * * * * * * * Political/Statistical Area Description Code * * Population Count (100 percent) * * * * * * * * Special Flag * * * * * * * * 1See the Summary Level Sequence Chart chapter for identification of the summary level record numbers. 2Puerto Rico Summary level Summary level 715 720 730 735 740 745 750 755 Field name * * * * * Place Description Code * * * * * Place Size Code Primary Metropolitan Statistical Area * * * * * * * * Region * * * * * * * * State (Census)2 * * * * * * * * State (FIPS) Urban/Rural Urbanized Area Urbanized Area Size Code Special Area Code (1) Special Area Code (2) * * * * * * * * Special Area Code (3) Special Area Code (4) Special Area Code (5) Special Area Code (6) Special Area Code (7) * * * * Special Area Code (8) * * * * * * * * Special Area Code (9) * * * * * * * * Special Area Code (10) Area Characteristics * * * * * * * * Area (Land) * * * * * * * * Area (Water) * * * * * * * * Area Name/PSAD Term/Part Indicator * * * * * * * * Functional Status Code * * Geographic Change User Note Indicator * * * * * * * * Housing Unit Count (100 percent) * * * * * * * * Internal Point (Latitude) * * * * * * * * Internal Point (Longitude) * * * * * * Part Flag * * Political/ Statistical Area Description Code * * * * * * * * Population Count (100 percent) * * * * * * * * Special Flag 2Puerto Rico