The Census Bureau first examined all of the addresses within each census block to define the list of ZIP Codes by block. Next, the most frequently occurring ZIP Code within each block was assigned to the entire census block as a preliminary ZCTA code. After all of the census blocks with addresses were assigned a preliminary ZCTA code, blocks were aggregated by code to create larger areas. The Census Bureau assigned blocks that contained addresses, but did not have a single most frequently occurring ZIP Code to the ZCTA with which the blocks had the longest shared boundary. If the area of an unassigned enclave was less than two square miles, it was assigned to the surrounding ZCTA. The Census Bureau used block group boundaries to identify and group unassigned blocks. These unassigned blocks were merged into an adjacent ZCTA based on the length of shared boundary.

For the Census 2000 ZCTAs the Census Bureau created ZCTAs that ended in 'XX' to represent large areas of land without ZIP Codes or 'HH' to represent large areas of water without ZIP Codes. For the 2010 Census, large water bodies and large unpopulated land areas do not have ZCTAs. Cara Corel Photo Paint X4.

Census Data API: /data. 1990 Decennial Census of Population and Housing. Is an annual series that provides economic data by ZIP Code. Population Data From The 1990 Census y90.mod.zip SPECIAL NOTE Some 1990 Census files have been modified for age and race STF1A, SAS File 1990 CC36.SAS606.STF1A90.STATES) has NOT been modified. Additional Resources for 1990 Census Data (STF3A & B) from the U. Securecrt For Gns3. S. Census Bureau. 1990 Census Lookup and documentation for STF3A and STF3B CD-ROM files.

ZCTAs were created using residential and nonresidential ZIP Codes that are available in the Census Bureau’s MAF/TIGER database. ZIP Codes assigned to businesses only or single delivery point address will not necessarily appear as ZCTAs. In most instances the ZCTA code is the same as the ZIP Code for an area. In creating ZCTAs, the Census Bureau took the most frequently occurring ZIP Code in an area for the ZCTA code. Some addresses will end up with a ZCTA code different from their ZIP Code.

Some ZIP Codes represent very few addresses (sometimes only one) and therefore will not appear in the ZCTA universe. Differences between Census 2000 and 2010 Census ZCTAs. Key Differences between Census 2000 and 2010 Census ZCTAs Census 2000 2010 Census Includes the U.S. And Puerto Rico Includes the U.S., Puerto Rico, and the Island Areas Cover the full extent of the nation - 'wall-to-wall' coverage Do not cover the full extent of the nation - 'holes' exist 3-digit and 5-digit ZCTA's available 5-digit ZCTA's only 'XX' suffix used to represent large land areas such as national parks 'XX' retired - Large land areas such as national parks do not have ZCTA coverage 'HH' suffix used to represent large water bodies 'HH' retired - Large water bodies do not have ZCTA coverage Definitions & Reference Products. Windows Xp Plus Superpack on this page.

Statistics from 1990 Census of Population and Housing Electronic Records Reference Report Introduction This reference report provides information about data files from the 1990 Census (21st Census) of Population and Housing in the custody of the National Archives. None of the records described contain individual names or identifiers. The data files contain summary statistics on population and housing characteristics, public use microdata samples, or geographic reference data. Researchers may order copies of the computerized data files for a cost-recovery fee and analyze the records directly, using whatever hardware and software they have. For more information on ordering data files, see:. Descriptions of the series and data files listed in this report are in the. The National Archives Catalog can be searched by title, National Archives Identifier, type of archival material, or keyword.

Summary Statistic Files Record Group 29: Records of the Bureau of the Census • Summary Statistic Data Files from the 21st Census of Population and Housing National Archives Identifier: This series contains summary statistic data tabulated from the response to the 21st Census of Population and Housing (1990 Census). The Summary Tape Files (STF) are basically a set of predefined tables of subject matter for various levels of geography. The catalog description for each STF detail the subject matter and geographic areas covered in the file.