Rhode Island Data File

RECORDS AND ARCHITES ADMINISTRATION TYNOLLIN National Archives and Records Administration 8601 Adelphi Road 1985 College Park, Maryland 20740-6001 1970 Census Master Area Tract Identification, Latitude and Longitude Descriptive Array (MATILDA) Tract Extract Files Center for Demography and Ecology, University of Wisconsin-Madison, Collection (CDE) Donor Documentation Contents: # Pages Documentation 15 Total 15 NARA Prepared Documentation: User note 1 Sample Printout of MATILDA Tract Extract Files 2 Archival Electronic Records Inspection and Control (AERIC) Reports Available Upon Request Theodore J. Hull NN3-CDE-01-001 August 13, 2002 NARA's web site is http://www.archives.gov NARA Reference Copy RECCORDS AND ARCHIVES ADMINISTRATION TYNOLIN National Archives and Records Administration 8601 Adelphi Road 1985 College Park, Maryland 20740-6001 User Note 1970 Census Master Area Tract Identification, Latitude and Longitude Descriptive Array (MATILDA) Tract Extract Files Center for Demography and Ecology, University of Wisconsin-Madison, Collection (CDE) August 13, 2002 Documentation: The documentation for the Master Area Tract Identification, Latitude and Longitude Descriptive Array (MATILDA) Tract Extract Files pertains to a number of series of 1970 Census Geographic Identification Code Scheme Tape Files prepared by the National Data Use and Access Laboratories (DUALabs). Note that NARA also has available the MEDList Extended with Geographic Coordinates (MED-X) files, accessioned into the Records of the Bureau of the Census (Record Group 29). The documentation contains a number of handwritten makings suggesting that the files available from the National Archives are the MATILDA, rather than the MATILDA Tract Extract files. The original file identifiers for the files obtained from the Center for Demography and Ecology match those appearing on page 5 of the original documentation and identified as the MATILDA Tract Extract files. Therefore, we determined these files to be the MATILDA Tract Extract files. Note also that the documentation describes records of 132 characters in length. The records are 129 characters in length with the 129th character a blank. THEODORE J. HULL Archivist Electronic & Special Media Records Services Division NARA's web site is http://www.nara.gov NARA Reference Copy RECCORDS AND ARCHIVES ADMINISTRATION TVNOLLIN National Archives and Records Administration 8601 Adelphi Road 1985 College Park, Maryland 20740-6001 Theodore J. Hull August 13, 2002 3-CDE-01-001 Sample Dump of the 1970 Census Master Area Tract Identification, Latitude and Longitude Descriptive Array (MATILDA) Tract Extract Files Center for Demography and Ecology, University of Wisconsin-Madison, Collection (CDE). Following is a page copied from a sample of records printed from the 1970 Census Master Area Tract Identification, Latitude and Longitude Descriptive Array (MATILDA) Tract Extract File for Alabama, created from the records as preserved by the Electronic & Special Media Records Services Division (2002-3273). The remaining files were preservation copied on 2002-3274 through 3323. The National Archives used File Transfer Protocol (FTP) to transfer the MATILDA Tract Extract Files from the Center for Demography and Ecology. The files were then copied to a CD-ROM, in ASCII, with fixed length records. The files were then preservation copied by the National Archives on to 18-track, 37,871 bpi, 3480-class tape cartridges in ASCII, with ANSI standard labels and fixed length records. The sample dump includes an ASCII dump on the right hand side and a hexidecimal translation of the ASCII characters on the left. NARA's web site is http://www.nara.gov NARA Reference Copy Dump APS RECORD DUMP Date: 08/05/2002 Time: 5:38 M16578 FILE #1 BLOCK # 0 RECORD # 0 DS#1 0000 30 31 36 33 20 20 20 20 20 20 20 20 20 20 20 20 0163 0010 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 0020 20 20 20 20 20 20 20 20 20 20 20 20 20 20 41 4C AL (1st 5 Recs) 0030 41 42 41 4D 41 20 20 20 20 20 20 20 20 20 20 20 ABAMA 0040 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 0050 20 20 20 20 20 20 20 20 20 20 20 20 20 31 31 31 111 0060 38 39 34 38 30 33 34 34 34 31 36 35 30 30 30 30 8948034441650000 0070 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 0000000000000000 0080 0A FILE #1 BLOCK # 0 RECORD # 1 0081 30 31 36 33 30 30 31 30 30 31 31 20 20 20 20 20 01630010011 0091 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 00A1 20 20 20 20 20 20 20 20 30 35 30 35 36 20 41 55 05056 AU 00B1 54 41 55 47 41 20 20 20 20 20 20 20 20 20 20 20 TAUGA 00C1 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 00D1 20 20 20 20 20 20 20 20 20 20 20 20 20 30 30 30 000 00E1 37 33 39 30 30 30 30 32 34 34 36 30 30 30 30 30 7390000244600000 00F1 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 0000000000000000 0101 0A FILE #1 BLOCK # 0 RECORD # 2 0102 30 31 36 33 30 30 31 30 30 31 31 30 30. 35 20 20 01630010011005 0112 20 20 37 20 20 20 20 20 20 20 20 20 20 20 20 20 7 0122 20 20 31 36 33 30 32 35 30 35 30 35 36 31 52 45 163025050561RE 0132 4D 41 49 4E 44 45 52 20 4F 46 20 4D 43 44 20 28 MAINDER OF MCD ( 0142 4F 52 20 43 43 44 29 20 20 20 20 20 20 20 20 20 OR CCD) 0152 20 20 20 30 30 30 37 20 31 20 20 30 34 30 30 30 0007 1 04000 0162 30 35 33 38 30 30 30 30 32 30 30 36 30 30 30 30 0538000020060000 0172 38 36 37 31 32 32 30 30 30 30 33 32 34 35 33 38 8671220000324538 0182 0A FILE #1 BLOCK # 0 RECORD # 3 0183 30 31 36 33 30 30 31 30 30 31 31 30 30 35 30 31 0163001001100501 0193 31 35 34 30 32 20 20 20 20 20 20 20 20 20 20 20 15402 01A3 20 20 31 36 33 30 32 35 30 35 30 35 36 31 41 55 163025050561AU 01B3 54 41 55 47 41 56 49 4C 4C 45 20 20 20 20 20 20 TAUGAVILLE 01C3 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 01D3 20 20 20 30 30 30 36 20 31 20 20 30 34 30 30 30 0006 1 01000 01E3 30 32 37 33 30 30 30 30 30 38 37 30 30 30 30 30 000004800000ELZ0 01F3 38 36 36 35 34 37 30 30 30 30 33 32 34 33 33 30 8665470000324330 Page 1 NARA Reference Copy DCA National Data Use and Access Laboratories *** IN 20% OF THE CASES July 1971 THE LONGITUDINAL AXIS Technical Document No. GT-1 is CALCULATED INCORRECTLE 1970 Census Geographic Identification Code Scheme Tape Files (Description of file contents and technical conventions) File Titles I. Geographic Area Code Index (GACI) Geographic Codes and Area Names for States, Counties, Minor Civil Divisions (or Census County Divisions), and MCD (CCD) /Place Segments. II. Master Enumeration District List (MEDList): Geographic Codes and Area Names, plus Total Population and Housing Unit Counts for all the areas in GACI, plus individual Enumeration Districts and Blockgroups. III. MEDList Extended with Geographic Coordinates (MED-X) Content and areas the same as in MEDList with the addition of Latitude and Longitude Coordinates for Enumeration Districts and Blockgroups only. IV.A. Master Area Tract Identification, Latitude and Longitude Descriptive Array (MATILDA): Geographic Codes, Area Names, and Total Population and / Housing Unit Counts for States, Counties, MCD's (CCD's), and MCD (CCD) place Segments as in MED-X; plus Geographic Codes, Area Names, Total Population and Housing Unit Counts, and Average Latitude-Longitude Coordi- nates for Census Tracts in Tracted Areas and Place Segments and MCD Re- mainders plus MCD's lacking Places outside Tracted Areas (these latter records summarized from the ED's and Blockgroups in the order as found in MED-X). IV. MATILDA Tract Extract: Geographic Codes, Area Names, and Total Population and Housing Unit Counts for States and Counties; plus Geographic Codes, Area Names, Total Population and Housing Unit Counts, and Average Latitude- Longitude Coordinates for Census Tracts in Tract Sequence and those Place Segments and MCD Remainders and MCD's without places lacking Tracts. Note: MATILDA Tract Extract is available in a special formatted printout. See Appendix for Description. Pages Contents of Documentation reverse cover Introduction I. Technical Conditions Affecting Use of Geographic Files 1-6 A. Technical Characteristics of Magnetic Tape Recording 1-2 2-4 B. Sequence of Files 4-6 C. File Label Formats 7-18 II. Description of Contents of Files A. Layout of File Logical Records including Display Examples 7-13 14-18 B. Codes, Definitions, and Explanations Appendix: Description of MATILDA Tract Extract Special Printout 1411 Jefferson Davis Highway Arlington, Virginia 22202 Phone (703) 920-8300 Suite 910 NARA Reference Copy Introduction chnical Document GT-1 describes geographic identification code scheme linked files eveloped for the 1970 consus. These filos, which contain area names data tapes willin identify geographic areas by codes only. They also serve other geographic codes, facilitate working with the 1970 census summary purposes. The counties, minor civil divisions (or census county divisions), and MCD(CCD)/place Geographic Area Code Index file (GACI) was created to join the names of states, segments with the geographic codes specific to each. Master Enumeration District List file (MEDLIST) performs the same function, the but The adds codes for individual enumeration districts and blockgroups and includes total population and housing unit counts for each area in the file. MEDLIST Extended with Coordinates (MED-X) provides, in addition to the above, The latitude and longitude coordinates for each enumeration district and blockgroup. Area Tract Identification, Latitude and Longitude Descriptive Array The Master summarizes ED and blockgroup records to the census tract level unit in the (MATILDA) found on the MED-X tape, providing total population and housing order counts as plus the average latitude and longitude coordinates for each tract. MATILDA similarly summarizes enumeration districts outside tracted areas to the place seg- MCD remainder, and MCD levels in the order as found in MED-X. Finally, ment, MATILDA includes all state, county, MCD, and place segment records found in MED-X. These have total population and housing unit counts but not coordinates. Tract Extract focuses on tracts. The state and county records from MED-X ATILDA present, but all place segment and MCD records without coordinates are eliminated. The are tract summaries are sequenced in tract order following the summaries for MCD's, place segments, and MCD remainders lacking tracts. Technical Document GT-1 describes all of the above files, indicating their many elements and also each file's unique elements. An Appendix to Technical common Document GT-1 describes a specially=formatted version of MATILDA Tract Extract which is available as computer printout. Note: for visual identification of the codes and area names specified in the geographic tape files, users should consult the Census Metropolitan, County, and Place Maps. NARA Reference Copy -1- I. Technical Conditions Affecting Use of Geographic Files Technical Characteristics of Magnetic Tape Recording 1. Computer on which files originally prepared: GACI, MEDLIST, and MED-X: UNIVAC 1107/1108 and IBM 1401 for 7-track; IBH 360/40 for 9-track MATILDA and MATILDA Tract Extract: IBM 360/65 2. Computer on which user's tape copy created: IBM 360/65 3. Tape width, reel size, and tape length: .5 inch width; 10.5 inch diameter, maximum 2,400-foot length 4. Recording mode: NRZI (non-return to zero) 5. Language: Binary Coded Decimal (BCD) for 7-track; Extended Binary Coded Decimal Interchange Code (EBCDIC) for 9-track. A limited set of characters is used. (See "Technical Conventions for the 1970 Census Summary Tapes," 1970 Census Users' Guide, Part II.) 6. Density and Track: 556 or 800 CPI for 7-track; 800 or 1600 CPI for 9-track 7. Parity: Even for 7-track; Odd for 9-track 8. Recorded tape representation: One 6-bit character per tape frame for 7-track; One 8-bit character (byte) per tape frame for 9-track 9. Labels: Standard IBM OS labels or OS unlabeled (see section I.C. on File Label Formats) 10. Logical Record Size: GACI: 84 characters (blocked 24) MEDLIST: 108 characters (blocked 18) MED-X: 132 characters (blocked 15) MATILDA: 132 characters (blocked 15) MATILDA Tract Extract: 132 characters (blocked 15) 11. Blocking Factor or Physical Record Size: GACI: 2,016 characters (or 24 logical records) MEDList: 1,944 characters (or 18 logical records) MED-X: 1,980 characters (or 15 logical records) MATILDA: 1,980 characters (or 5 logical records) MATILDA Tract Extract: 1,980 characters (or 15 logical records) 12. Interblock spacing: .75 inch for 7-track; .6 inch for 9-track 13. Volumes: GACI: 1 tape reel for the U.S. MEDList: 3 reels or 2 reels (800 or 1600 CPI) for the Nation, state-morged, 1 reel per state, state-separate MED-X: 4 reels or 2 recls (800 or 1600 CPI) for the Nation, state-merged; 1 reel per state, state-separate MATILDA: 2 recls or 1 reel (800 or 1600 CRI) for the Nation, state-morged 1 recl per state, state-separate MATILDA Tract Extract: 1 recl for the Nation, state-mergod, 1 reel per state, state-separate NARA Reference Copy -2- 14. Total Size of Files: CACI: Approximately 60,000 logical records for the U.S. MEDList: Approximately 390,000 logical records for the U.S. MED-X: Approximately 390,000 logical records for the U.S. MATILDA: Approximately 175,000 logical records for the U.S. MATILDA Tract Extract: Approximately 100,000 logical records for the U.S. B. Sequence of Files GACI: This file contains records for states, counties, minor civil divisions (or census county divisions), and MCD (CCD) /place segments. The file is in sort by state (1970 State Code) by county (Federal Standard County Code) by MCD (or CCD) by place. The first record is for state 01. The second record is for county 001 in that state. The third record is for MCD (or CCD) 001 in that county, and the fourth record is for BCD(CCD)/place segment 0001 (where applica- blc). After all the place segments for a given MCD (or CCD) are presented, the next MCD and its place segments follow until all the MCD's for a given county and their place segments are presented. Then the next county follows and the pattern repeated until all the, counties in a given state and their MCD's and MCD/place segments are presented. Then the next state follows and the entire pattern repeated. See Display Example I in section II.A. for a specimen tape dump of the GACI file showing the sort sequence. MEDList: This file contains records for states, counties, minor civil divisions (or census county divisions), MCD(CCD)/place segments, enumeration districts and blockgroups. The file is in sort as in GACI by state by county by MCD (or CCD) by place, and then by census tract (where applicable) by ED and blockgroup. Hence, in tracted areas within MCD/place segment where applicable (including the MCD remainder) and MCD elsewhere, the ED's and blockgroups are presented in tract order with all the ED's in a tract preceding the blockgroups. sometimes, however, all the ED's in the entire place segment or MCD are presented first in tract order followed by all the blockgroups in tract order. When this happens and there are tracts composed of both ED's and blockgroups, the ED and blockgroup pieces of such tracts may not appear together. Note that blockgroups which are split by MCD, place, congressional district, annexed territory, or urbanized area boundaries will have two or more records which are not likely to appear together. These blockgroup splits are indicated by a single or double asterisk following the blockgroup number. (Also note that where blockgroups are split by the city delivery area boundary line, the MEDList records for these blockgroups pertain only to the portion inside the city de- livery area. The remainder of the blockgroup outside the city delivery area is combined with the ED in which it is located.) Outside tracted areas, ED's are in sort by MCD/place segment where applicable (including the MCD remainder) and MCD elsewhere. See Display Example II in section II.A for a specimen tape dump of the MEDLIST showing the sort sequence. NARA Reference Copy -3- This file contains records for states, counties, minor civil divisions MED-X: census county divisions), MCD(CCD)/place segments, enumeration districts and (or blockgroups, and is in the same sort sequence as the MEDList. See Display Example III in section II.A. for a specimen tape dump of the MED-X file showing the sort sequence. This file contains records for states, counties, minor civil divisions file MATILDA: census county divisions), and MCD (CCD)/place segments as in MED-X. The also (or contains records summarized from the ED's and blockgroups in the order as found in MED-X for census tracts in tracted areas and for place segments and MCD remainders plus MCD's lacking places outside tracted areas. file is in sort by state by county by MCD (or CCD) by MCD (CCD) /place segment The where applicable (including the MCD remainder) by census tract where applicable. This sort sequence means that where tracts are split by MCD or place segment boundaries, there will be records for each split part of the tract in separate places in the file. (However, within place segment or MCD, tract records always both ED's and blockgroups in cases where all the ED's were presented ahead of the represent entire tracts in tract order. This is true even for tracts composed of blockgroups in MED-X. See previous discussion of this point under MEDList.) Note that there are records containing average latitude and longitude coordinates for place segments and MCD remainders outside tracted areas and also for entire MCD's outside tracted areas which lack places, but no records with coordinates for place segments or MCD's in tracted areas, since the coordinates were calculated for the individual tracts. However, there are records showing total population and housing unit counts taken directly from MED-X for all MCD's and place segments including those in tracted areas. MCD and place segment records lacking coordi- nates always precede records with coordinates. See Display Example IV.A. in section II.A. for a specimen tape dump of MATILDA showing the sort sequence. This can be compared to Display Example III for MED-X, which includes the same areas, to see how MATILDA was derived. MATILDA Tract Extract: This file contains records for states, counties, census tracts in tracted areas, and MCD(CCD)/place segments and MCD remainders outside. tracted areas plus MCD's (or CCD's) outside tracted areas which lack places. The file is in sort by state by county with all the records outside tracted areas appearing first in sort by MCD (or CCD) by MCD(CCD)/place segment where appli- cable (including the MCD remainder), followed by all the tracted area records in tract sort. The tract records represent summaries for entire tracts, climinating any splits, and hence may not be in MCD or place segment sort. In addition, for tracts which were split, the geographic codes and area name carried on the tract summary record will be as taken from the first ED or blockgroup in that tract and may apply to only part of the tract. Note that the records from MED-X showing total population and housing unit counts but not coordinates for MCD's and place segments have been eliminated. This means that where place segments or MCD's are tracted or where MCD's outside tracted areas have place segments, there are no records showing total population and housing (or geographic codes or area name) for these areas. NARA Reference Copy -4- See Display Example IV.B. in section II.A. for a specimen tape dump of MATILDA Tract Extract showing the sort sequence. This can be compared to Display Example IV.A. for MATILDA and also to Display Example III for MED-X, both of which in- clude the same areas, to see how MATILDA Tract Extract was derived. C. File Label Formats Header and trailer labels on DUALabs' 1970 census geographic tape copies are standard IBM OS labels. Labels are classified into two required types: "Volume" labels, where "Volume" coincides with a physical tape reel, and "File" labels, where "File" has the normal meaning of a collection of related data records, more than or less than one reel. A label is always an 80-character physical record. In the conventions for the 1970 census geographic tapes, labels are restricted to the following: 1. One Volume Header (VOL1) at the beginning of each physical tape reel. 2. Two File Headers (HDR1,2) at the beginning of each file and at the be- ginning of each tape reel (following the Volume Header) within file. 3. One Volume Trailer (EOV1) if end of tape does not coincide with end of file. 4. Two File Trailers (EOF1,2) at end of file. If end of tape and end of file coincide, use only File Trailers. The rules for tape mark are: 1. One tape mark separates labels and data, occurring after all labels which precede data, and before all labels which follow data. 2. Two tape marks appear at the end of tape after EOV or EOF records. 3. If a file ends within a volume and another file is written on that volume, then one tape mark both precedes and follows the end of file labels) the next file headers appear and are separated from their data by a tape mark. Label content: As noted, the labels on DUALabs' geographic tape copies are standard IBM OS labels. The File Identifier (Data Set Name) which appears beginning in character 5 of the First File Header Label is specified for each geographic tape file on the following page. Unlabeled DUALabs' Geographic Tape Copies 1970 census geographic tape copies produced by DUALabs without labels simply contain data followed by a tape mark. In the case of state-merged files, where each state's data constitutes a separate file and there is more than one file on a reel, a tape mark separates each state's data. NARA Reference Copy -5- File Identifiers for Geographic Tape Files GACI: USPRELIM MEDList, state-merged file for U.S.: US. FINAL The following File Identifiers for individual states apply as indicated to the state-separate MEDList files; both the state-separate and state-merged MED-X files (the stato-merged version retains each state's data as a separate file) , similarly, both the state-separate and state-merged versions of MATILDA and MATILDA Tract Extract. State File Identifiers MATILDA State MEDList MED-X MATILDA Tract Extract ALA. ALA MAALA MTALA Alabama ALASKA ALASKA MAALASKA MTALASKA Alaska ARIZ. ARIZ MAARIZ MTARIZ Arizona Arkansas ARK. ARK MAARK MTARK CALIF. CALIF MACALIF MTCALIF California COLO. COLO MACOLO MTCOLO Colorado CONN. CONN MACONN MTCONN Connecticut Delaware DEL. DEL MADEL MTDEL DGC * District of Columbia D.C. MADC MTDC Florida FLA. FLA MAFLA MTFLA GA. GA MAGA MTGA Georgia vaii HAWAII HAWAII MAHAWAII MTHAWAII aho IDAHO IDAHO MAIDAHO MTIDAHO illinois ILL. ILL MAILL MTILL Indiana IND. IND MAIND MTIND IOWA IOWA MAIOWA MTIOWA Iowa KANS MAKANS MTKANS Kansas KANS. Kentucky KY. KY MAKY MTKY Louisiana LA. LA MALA MTLA Maine MAINE MAINE MAMAINE MTMAINE Maryland MD. MD MAMD MTMD Massachusetts MASS. MASS MAMASS MTMASS Michigan MICH. MICH MAMICH MTMICH Minnesota MINN. MINN MAMINN MTMINN Mississippi MISS. MISS MAMISS MTMISS Missouri MO. MO MAMO MTMO Montana MONT. MONT MAMONT MTMONT Nebraska NEBR. NEBR MANEBR MTNEBR Nevada NEV. NEV MANEV MTNEV New Hampshire N.H. NOH * MANH MTNH New Jersey N.J. NKJ * MANJ MTNJ New Mexico N.KMEX. NUMEX * MANMEX MTNMEX New York N.Y. NLSY * MANY MTNY North Carolina N.C. NWC * MANC MTNC North Dakota NUDAK * N. YDAK MANDAK MTNDAX NARA Reference Copy -6- State File Identifiers (Cont'd) MATILDA tato MEDList MED-X MATILDA Tract Extract jhio OHIO OHIO MAOHIO MTOHIO Okl "oma OKLA. OKLA MAOKLA MTOKLA OREG. OREG MAOREG MTOREG 0.0000 Pennsylvania PA. PA MAPA MTPA Rhode Island R.I. R.I.' MARI MTRI South Carolina S.C. SPC * MASC MTSC South Dakota SBDAK * S.BDAK. MASDAK MTSDAK TENN. TENN MATENN MTTENN Tennassee Texas TEX. TEX MATEX MTTEX Utah UTAH UTAH MAUTAH MTUTAH Vermont VT. VT MAVT MTVT Virginia VA. VA MAVA MTVA Washington WASH. WASH MAWASH MTWASH WBVA * West Virginia W.KVA. MAWVA MTWVA Wisconsin WIS. BWISC * MAWISC MTWISC Wyoming WYO. WYO MAWYO MTWYO * State File Identifiers on the state-merged version of MED-X will not have periods or blanks. Rhode Island, for example, will appear as RI and not R.I.; similarly, South Dakota will appear as SDAK and not SBDAK. NARA Reference Copy -7- Description of Contents of Files Layout of File Logical Records including Display Examples The following lists the items which appear in the geographic tape files and their character position (s) in the file logical records. For specimen tape duaps of the files showing record layout, see Display Examples I (GACI), II (MEDList), III (MED-X), IV.A. (MATILDA), and IV.B. (MATILDA Tract Extract) following this section. Note that each type of record in a file (state, county, MCD, etc.) contains only those items applicable to it with the remainder of the record blank. Character (s) Item GACI, MEDList, MED-X, MATILDA, and MATILDA Tract Extract all contain the following items: 1 - 2 1. 1970 State Code 3 - 4 2. 1960 State Code 5 - 7 3. Federal Standard County Code 8 - 10 4. County of Tabulation Code 11 5. Central County Code 6. Minor Civil Division or Census County Division Code 12 - 14 15 - 18 7. Place Code 19 8. Place Description Code 9. Size of Place Code (Sometimes blank in GACI which was 20 - 21 prepared prior to tabulation of the 1970 census population counts in some instances.) 22 10. Standard Consolidated Area Code 11. Standard Metropolitan Statistical Area Code 23 - 26 27 - 30 12. Urbanized Area Code 31 - 34 13. Tracted Area Code 14. Universal Area Code Prefix 35 36 - 40 15. Universal Area Code 16. State Economic Area Code 41 - 42 43 - 45 17. Economic Sub-Ragion Code 18. Central Business District Code (Blank in GACI) 46 19. Area Name 47 - 76 NARA Reference Copy as -8- Character (s) Item GACI contains the preceding 19 items only, plus 8 characters of padding at the end of the logical record; MEDList, MED-X, MATILDA, and MATILDA Tract Extract all contain the following items in addition. 77 - 80 20. Basic Tract Code 21. Tract Suffix Code 81 - 82 22. Blockgroup Code (Not relevant in MATILDA or MATILDA 83 Tract Extract) * 23. Enumeration District Code (Not relevant in MATILDA or 84 - 87 MATILDA Tract Extract) * 24. Enumeration District Suffix Code (Not relevant in 88 MATILDA or MATILDA Tract Extract) * 25. Urban/Rural Classification Code 89 26. Ward Code (ED records only) 90 - 91 27. Congressional District Code 92 - 93 28. Housing Count 94 -100 29. Population Count 101 -108 MEDList contains the preceding 29 items only; MED-X, MATILDA, and MATILDA Tract Extract contain the following items in addition. 30. Longitude (expressed in degrees and decimal equivalents 109 -118 of minutes and seconds as follows: 3 leading zeroes, 3 places for degrees, and 4 decimals) 31. Latitude (expressed in degrees and decimal equivalents 119 -128 of minutes and seconds as follows: 4 leading zeroes, 2 places for degrees, and 4 decimals) Blank 129 -132 The geographic codes and area names carried on the MATILDA and MATILDA Tract Extract records summarized from ED's and blockgroups are as taken from the first ED or blockgroup summarized. Honce, some codes are not applicable at all to the summary records, for example, ED and blockgroup codes. Other codes may not be entirely applicable in cases where summary records are split across urban/rural, congressional district, or other boundaries for which there are codes in the files. NARA Reference Copy NARA Reference Copy 70 FED SEA/ ST CTY MCD Place SMSA UA TA UAC ESR CBD Area Name Tract BG RD U/R 8 Housing Population Longitude Istitude I 1 I I I 1 , I 1 1 I 1 11 1111 11. 09150010011100 1100 A005 TROMBULL TCWN 1160210025 ACC517RUNHULL TU.V. 0901 90 1 09160210011133 7 1100 7 116011601160210C05 AJ051TRUMBULL TOWN 0902 1 0 09160010011100 7 116011601160210005 ACC51TRUNTULL TOWN 0903 1 0 7 116011601166215005 ACC51780490LL TOWN 0904 1 0 7 116011601160216335 ACOSITHUMAOLL TOWN 0905 1 0 09150010011100 7 116011801160210005 ACCSLTRUMBULE TOWN 0906 1 0 0907 90 1 050000897000035340000732038C000412811 09160010011100 7 1100 1160216005 AGG51TRUMBULL TOWN 00000000000000000000119100006612000 09160010011105 A005 WESTON TOWN 091000100111050820503 216086 AC05 GEORGETOWN (U) 5760216096 ACCSIGEURGETCWN (U) 0551 0858 1 091500100111050820503 09160010011105 7 5760216086 ACOSIREMAINDER OF MCD (OR CCO) 0551 0859 1 0400010310000351300007338110C00412335 5760216086 ADOSIRENAINDER OF MCD (OR CCD) 0552 0862 1 7 ACCS WESTPORT TOWN 00084850002741400303000000000000000 29100010011110 5760 570057065700210004 ACC51WESTPURT TOWN 0501 2649 0 04000121300003936000C7337553000411539 09150010511113 7 09100010011110 7 57eC57605700210069 ACG51WESTPORT TOWN 0502 1 o 0400013730000404500007335650000411522 5760216069 A0051WESTPORT TOWN 0503 1* 1 09160010011110 7 5763 09160010011110 7 576057605700216009 AGOSINESTPORT TOWN 0504 0882 0 040000898000027290C007338230C03410929 576C5760576C216069 ACC51WESTPURT TChN 0505 1 0 C400015820000487000007335660000411212 09162010011110 7 5760210009 AU051mESTPORT TOWN 0506 0881 1 0400010210000323100007332140000411294 09160010711110 7 5760 09160010011115 5760 ACCS WILTON TOWN 091600100111150820503 5760 216070 4005 GEORGETOWN (U) 5760216C7C ACOSIGFORGETCAN (U) 0451 0853 1 0400003050000094700007343170000412459 091000100111150820503 5700 09150010011115 5760216070 ACOSIREMAINDER OF MCD (OR CCDI 0451 0855-1 7 5700 5700 576021607C ACC518EMAINDEN OF MCD (OR CCD) 0452 2078C1 0400006390000193920027343100003411999 C9160010011115 7 576057605160216073 ACOSIREMAINDER OF MCD (OR CCD) C453 2679C5 09160010011115 7 09160010011115 7 5760 5760216070 ACCSIREMSINOEN OF MCD (OR CCDI 0454 268CC1 09160030031 crcs HARTFORD 00024740000935200000000060000000000 04160030031005 3280 COC4 AVUN TUWN 05150030031005 7 3280 3280216020 COSTAVON TOWN 4621 0110 1 0600011760000408100097249270030417875 326021002C COC41AVOR TOWN 4622 0102 1 E962198000255822000012230000862100099 1 3280 09160030031010 344, CO04 BERLIN TOWN 00043830001414900000000000000000000 OCCA18ENLIN TOWN 4001 0158 0 0600017480009547800307284470000416271 09160030051010 7 544049605440210040 Display Example IV.A. Tape Themp of MATTIDA Connecticut, Pairfield and Hartford Co. Parts 04155033331010 7 544049605440210040 COC418ERLIN TUnN 4002 0159 0 0600007470000244900007275746003415796 5440216040 CC0413EKLIN TOWN 4003 0163 1 06000188800062220000727378C330416325 09180030031010 1 544C C4160030031015 3200 COO4 HLOOMFIELD TOWN 00053810001830100000000000000000003 C9160C30C31C15 32d032803280215C16 CCCSIBLOUMFTELD TOWN 4711 1 0 010001148C000407100007269210000418157 7 3290 3280216016 CCOSIBLOUNFTELD TOWN 4712 1* 1 C100010820000364100007270710000418199 64160030331015 7 328C328C3280215016 COC4IBLOONFIELD TCWN 4713 1 0 C9153030631015 7 C9150030031015 3230216016 TUWN 4714 0062 1 0100010780000385400007278180300418441 7 3230 09150030031015 7 3200 3280216016 CCO41BL0OMFIELD TOWN 4715 0060 1 010000392C0001219C000727129C000418526 C004 BRISTOL TOWN 00175550005548700000000000000000000 05150030030020 1170 091c03300300200236311 1170 316C96 CCC4 BRISTOL 00175550005548700000000000000000000 -14- B. Codes, Definitions, and Explanations 1. 1970 State Code - A two-digit numeric code assigned to the states alpha- betically. The codes used are those defined in Federal Information Pro- cessing Standard Publications (FIPS PUBS) 5-1 and 6-1. See list of codes below. 2. 1960 State Code - A two-digit numeric code assigned by geographical divi- sions. The first digit indicates the division in which the state is located and the second digit indicates the state. See list of codes below. 1970 Federal Standard State Codes and 1960 Census State Codes State 1970 1960 State 1970 1960 01 63 Montana 30 81 Alabama 02 94 Nebraska 31 46 Alaska Arizona 04 86 Nevada 32 88 Arkansas 05 71 New Hampshire 33 12 New Jersey 34 22 California 06 93 Colorado 08 84 New Mexico 35 85 Connecticut 09 16 New York 36 21 Delaware 51 North Carolina 37 56 10 District of Columbia 11 53 North Dakota 38 44 Florida 12 59 Ohio 39 31 Georgia 13 58 Oklahoma 40 73 Hawaii 15 95 Oregon 41 92 23 Idaho 16 82 Pennsylvania 42 Illinois 17 33 Rhode Island 44 15 Indiana 18 32 South Carolina 45 57 Iowa 42 South Dakota 46 45 19 20 47 Tennessee 47 62 Kansas Kentucky 21 61 Texas 48 74 Louisiana 22 72 Utah 49 87 23 11 Vermont 50 13 Maine Maryland 24 52 Virginia 51 54 Massachusetts 25 14 Washington 53 91 Michigan 26 34 Wast Virginia 54 55 27 41 Wisconsin 55 35 Minnesota Mississippi 28 64 Wyoming 56 83 Missouri 29 43 3. Federal Standard County Code - A three-digit numeric code assigned alpha- to counties within state. The codes used are those defined in FIPS PUB 6-1. 4. County of Tabulation Code - A three-digit numeric code which usually agrees with the Federal Standard County Code, unless the record was assigned an incorrect Federal County Code. In this case, the County of Tabulation Code represents a correction which should be followed in the aggregation of records. 5. Central County Code - A one-digit numeric code identifying counties that contain central cities of Standard Metropolitan Statistical Areas (SMSA's) 8 0 - Yes and 1 or No. NARA Reference Copy -15- 6. Minor Civil Division (MCD) or Census County Division (CCD) Code - A three- digit numeric code identifying a township or equivalent area, including census county divisions, assigned alphabetically within county. The codes are not consecutive, gaps are provided for use in adding now units. 7. Place Code - A four-digit numeric code identifying "place" as defined by the Bureau of the Census, assigned alphabetically to places within state, Gaps are provided. 8. place Description Code - A one-digit numeric code identifying places by type. The codes include: 1 = Central city of an SMSA only, 2 = Central city of an urbanized area only, 3 = Central city of both an SMSA and an urbanized area, 4 = other incorporated place, 5 = unincorporated place, and 7 - not a place (applies to MCD remainders). 9. Size of place Code - A two-digit code identifying places by the size group (16 groups) into which they fall on the basis of the 1970 population count. The size codes are: 00 = under 200 population 08 = 10,000 to 19,999 01 = 200 to 499 09 = 20,000 to 24,999 02 = 500 to 999 10 = 25,000 to 49,999 03 = 1,000 to 1,499 11 = 50,000 to 99,999 04 = 1,500 to 1,999 12 = 100,000 to 249,999 05 = 2,000 to 2,499 13 = 250,000 to 499,999 06 = 2,500 to 4,999 14 = 500,000 to 999,999 07 = 5,000 to 9,999 15 = 1,000,000 or more population 10. Standard Consolidated Area Code - A one-digit alphabetic code identifying metropolitan complexes around some of the Nation's largest cities, which comprise several contiguous SMSA's and additional counties that do not meet the formal integration criteria for SMSA's but do have other strong rela- tionships. The two SCA's identified to date are the New York-Northeastern New Jersey SCA (code A) and the Chicago-Northwestern Indiana SCA (code B). 11. Standard Metropolitan Statistical Area Code - A four-digit numeric code assigned to SMSA's alphabetically within the U.S. An SMSA is a county or group of counties containing at least one city of 50,000 or more population, plus any adjacent counties which are metropolitan in character and eco- nomically and socially integrated with the central county or counties. In New England the unit is a town rather than a county. One or more central cities are identified for each SMSA. SMSA boundaries may cross state lines. The codes used are those defined in FIPS PUB 8. 12. Urbanized Area Code - A four-digit numeric code identifying urbanized areas within the U.S. An urbanized area is a city (or twin cities) of 50,000 or more population (central city) plus the surrounding densely settled incor- porated and unincorporated areas which meet certain criteria of population statistics or density. UA'S differ from SMSA's chiefly in excluding the rural portions of counties composing the SMSA's and excluding those places separated by rural territory from the densely populated fringe around the central city. 13. Tracted Area Code - A four-digit numeric code identifying tracted areas within the U.S. Tracted areas are usually SMSA's but may also include adjacent areas (non-SMSA cities and counties) NARA Reference Copy -16- 14. Universal Area Prefix Code - A one-digit numeric code indicating the level of a versal Area code. The levels are: 1 If County, 2 - New England Town, 3 = City, and 4 = Central Business District. 15. Universal Area Code - A five-digit numeric code assigned within the U.S. to all central citics of SMSA's and to the central business districts of all cities of 100,000 or more population, all places of 20,000 and over, to county remainders, and to all other counties. 16. State Economic Area Code - A two-digit numeric code or a one-digit alphabetic code assigned within state to single counties or groups of counties which are relatively homogeneous with respect to economic and social characteristics. 17. Economic Sub-Region Code - A three-digit numeric code assigned within the U.S. to combinations of the 509 state economic areas, each grouping bringing together those SEA's which are more closely related in terms of their eco- nomic and social characteristics. ESR boundaries frequently cross state lines. 18. Central Business District Code - A. one-digit numeric code indicating which ED's and blockgroups are to be tabulated as part of a CBD: 0 = Yes and 1 - No. Only used for cities of 100,000 or more population. 19. Area Name - 30 characters provided for alphabetic spelling of state, county, MCD (or CCD), or place name. 20-21. Tract Code (Basic and Suffix) - A six-digit numeric code assigned within county to census tracts as defined for the 1970 census. The first four digits identify the "basic" tract, while the final two identify a subdivision into two or more tracts of what was originally a single tract (e.g., in 1960). There is an implied period or hyphen between the fourth and fifth digits. Bureau of the Census publications and maps eliminate the fifth and sixth digits if they are both zeroes. The tract code is always unique within county (as noted), usually unique within SMSA, and, in a few instances, unique within state. 22. Blockgroup Code - A one-digit numeric code assigned within tract to combina- tions of contiguous blocks having a combined average population of about 1,000. On the Census Metropolitan Maps, the first digit of the three-digit block-number indicates the blockgroup code. Used only in those areas covered by an Address Coding Guide. 23-24. Enumeration District Code (Basic and Suffix) - A four-digit numeric basic code plus a one-digit alphabetic suffix code (where applicable) assigned to ED's within county. The suffix code is used to indicate parts of ED's split by area boundaries such as congressional district or split for administrative convenience in taking the census. 25. Urban/Rural Classification Code - A one-digit numeric code classifying ED's and blockgroups as urban, rural, or a combination of these: 0 - urban, 1 a rural, and 2 = mixed. 26. Ward Code - A two-digit code given to political subdivisions of a city used for voting and administrative purposes. Appears only on ED records. 27. Congressional District Code - A two-digit numeric code identifying congres- sional districts as designated by state legislatures, except that zero is used to precede one-digit numbers and 01 is used to identify areas in which members of Congress are elected at large rather than by district. NARA Reference Copy -17- 28. Housing count - Count of all housing units, occupied and vacant, for the area designated by the codes. Seven characters are provided for this count. 29. Population Count - Count of all persons for the area designated by the codes. Eight characters are provided for this count. 30. Longitude - Longitude of the population midpoint of the area designated by the codes (average longitude for MATILDA and MATILDA Tract Extract records summarized from ED's and blockgroups). Note that longitude is not shown for ED's with both zero population and housing. (This does not affect the average longitude for MATILDA and MATILDA Tract Extract records.) Longitude is expressed in degrees and decimal equivalents of minutes and seconds as follows: three leading zeroes, three places for degrees, and four decimals. See Table of Minutes and Seconds to Decimal Parts of a Degree on the next page. 31. Latitude - Latitude of the population midpoint of the area designated by the codes (average latitude for MATILDA and MATILDA Tract Extract records summarized from ED's and blockgroups). Note that latitude is not shown for ED's with both zero population and housing. (This does not affect the average latitude for MATILDA and MATILDA Tract Extract records.) Latitude is expressed in degrees and decimal equivalents of minutes and seconds as follows: four leading zeroes, two places for degrees, and four decimals. See Table of Minutes and Seconds to Decimal Parts of a Degree on the next page. For further definitions of geographic area concepts, consult the Census Users' Dictionary, published as part of the 1970 Census Users' Guide, Part I (U.S. Government Printing Office: Washington, D.C., 1970). Blockgroups with both zero population and housing are not included in any of the geographic tape files. ED's with zero population and housing, however, are shown. Note that for plotting the latitude and longitude coordinates on a map, the user must know the map projection being used. A FORTRAN routine for converting to Mercator or other projections is available. For further information, contact the Naval Oceanographic Office in Suitland, Md. For converting coordinates into miles, one degree of latitude is equal to 60 nautical miles (69 statute miles) , one degree of longitude is a function of the cosine of the latitude. For further information, contact the Geography Division of the U.S. Bureau of the Census. NARA Reference Copy