The TIGER/Line shapefiles and related database files (.dbf) are an extract of selected geographic and cartographic information from the U.S. Census Bureau's Master Address File / Topologically Integrated Geographic Encoding and Referencing (MAF/TIGER) Database (MTDB). The MTDB represents a seamless national file with no overlaps or gaps between parts, however, each TIGER/Line shapefile is designed to stand alone as an independent data set, or they can be combined to cover the entire nation. Congressional districts are the 435 areas from which people are elected to the U.S. House of Representatives. After the apportionment of congressional seats among the states based on census population counts, each state is responsible for establishing congressional districts for the purpose of electing representatives. Each congressional district is to be as equal in population to all other congressional districts in a state as practicable. The 118th Congress is seated from January 2023 through December 2024. In Connecticut, Illinois, and New Hampshire, the Redistricting Data Program (RDP) participant did not define the CDs to cover all of the state or state equivalent area. In these areas with no CDs defined, the code "ZZ" has been assigned, which is treated as a single CD for purposes of data presentation. The TIGER/Line shapefiles for the District of Columbia, Puerto Rico, and the Island Areas (American Samoa, Guam, the Commonwealth of the Northern Mariana Islands, and the U.S. Virgin Islands) each contain a single record for the non-voting delegate district in these areas. The boundaries of all other congressional districts reflect information provided to the Census Bureau by the states by August 31, 2022.

The 2023 cartographic boundary KMLs are simplified representations of selected geographic areas from the U.S. Census Bureau's Master Address File / Topologically Integrated Geographic Encoding and Referencing (MAF/TIGER) Database (MTDB). These boundary files are specifically designed for small-scale thematic mapping. When possible, generalization is performed with the intent to maintain the hierarchical relationships among geographies and to maintain the alignment of geographies within a file set for a given year. Geographic areas may not align with the same areas from another year. Some geographies are available as nation-based files while others are available only as state-based files. Congressional districts are the 435 areas from which people are elected to the U.S. House of Representatives. After the apportionment of congressional seats among the states based on census population counts, each state is responsible for establishing congressional districts for the purpose of electing representatives. Each congressional district is to be as equal in population to all other congressional districts in a state as practicable. The 118th Congress is seated from January 2023 through December 2024. In Connecticut, Illinois, and New Hampshire, the Redistricting Data Program (RDP) participant did not define the CDs to cover all of the state or state equivalent area. In these areas with no CDs defined, the code "ZZ" has been assigned, which is treated as a single CD for purposes of data presentation. The cartographic boundary files for the District of Columbia, Puerto Rico, and the Island Areas (American Samoa, Guam, the Commonwealth of the Northern Mariana Islands, and the U.S. Virgin Islands) each contain a single record for the non-voting delegate district in these areas. The generalzied boundaries of all other congressional districts are based on information provided to the Census Bureau by the states by August 31, 2022.

Congo, The Democratic Republic of the CD: Urban Land Area data was reported at 9,061.723 sq km in 2010. This stayed constant from the previous number of 9,061.723 sq km for 2000. Congo, The Democratic Republic of the CD: Urban Land Area data is updated yearly, averaging 9,061.723 sq km from Dec 1990 (Median) to 2010, with 3 observations. The data reached an all-time high of 9,061.723 sq km in 2010 and a record low of 9,061.723 sq km in 2010. Congo, The Democratic Republic of the CD: Urban Land Area data remains active status in CEIC and is reported by World Bank. The data is categorized under Global Database’s Democratic Republic of Congo – Table CD.World Bank: Land Use, Protected Areas and National Wealth. Urban land area in square kilometers, based on a combination of population counts (persons), settlement points, and the presence of Nighttime Lights. Areas are defined as urban where contiguous lighted cells from the Nighttime Lights or approximated urban extents based on buffered settlement points for which the total population is greater than 5,000 persons.; ; Center for International Earth Science Information Network (CIESIN)/Columbia University. 2013. Urban-Rural Population and Land Area Estimates Version 2. Palisades, NY: NASA Socioeconomic Data and Applications Center (SEDAC). http://sedac.ciesin.columbia.edu/data/set/lecz-urban-rural-population-land-area-estimates-v2.; Sum;

Tetra Tech, Inc., was contracted by the Lower Columbia River Bi-State Program to conduct a supplemental reconnaissance survey of sediment and biota (fish and crayfish) contaminant levels in backwater areas of the lower Columbia River (Tetra Tech 1994). These samples were intended to expand the data base of the original reconnaissance survey reported in Tetra Tech (1993). Station latitude and longitude were recorded from geographic coordinates provided by a Magnavox MX 2000 Global Positioning System (GPS) Navigator System receiver. The GPS locational information was not corrected for the U.S. Department of Defense's Selective Availability, and therefore the GPS latitudes and longitudes provided are accurate to approximately 100 m.

The area of study was Lower Columbia River - Bonneville Dam to river mouth.

Target analytes included seventeen dioxin and furan congeners, 7 PCB Aroclors, 16 metals and trace elements (Al, Sb, As, Ba, Be, Cd, Cr, Cu, Fe, Pb, Hg, Ni, Se, Ag, Tl, Zn), cyanide, 59 semi-volatile organic compounds (SVOCs) including 11 phenolic compounds and 17 polynuclear aromatic hydrocarbons, 26 pesticides, 6 PCB Aroclors, 3 butyltin compounds including tributyltin, and 8 long-lived radionuclides. Conventional analyses included sediment grain size and total organic carbon content. All data are reported on a dry weight basis.

Analytical techniques included dioxins and furans (EPA Method 1613 with modifications); PCB Aroclors (EPA Method 8080); metals and trace elements [Ag, Al, Ba, Be, Cu, Cr, Fe, Ni, Tl, and Zn by ICP (EPA Method 200.7); Sb (EPA 204.2), As (EPA 206.2), Cd (EPA 213.2), Pb (EPA 239.2), and Se (EPA 270.2) by GFAA; Hg (EPA 245.2) by CVAA)]; cyanide (SM 4500-CN E); SVOCs (EPA 8270) with SIM for PAH analysis; pesticides and PCBs (EPA 8080); butyltins (GC/MS with SIM); radionuclides by alpha spectroscopy and gamma counting.

The information for this metadata was taken from the Columbia River Basin: Sediment Database Abstracts.

Congo, The Democratic Republic of the CD: Rural Land Area Where Elevation is Below 5 Meters data was reported at 471.296 sq km in 2010. This stayed constant from the previous number of 471.296 sq km for 2000. Congo, The Democratic Republic of the CD: Rural Land Area Where Elevation is Below 5 Meters data is updated yearly, averaging 471.296 sq km from Dec 1990 (Median) to 2010, with 3 observations. The data reached an all-time high of 471.296 sq km in 2010 and a record low of 471.296 sq km in 2010. Congo, The Democratic Republic of the CD: Rural Land Area Where Elevation is Below 5 Meters data remains active status in CEIC and is reported by World Bank. The data is categorized under Global Database’s Democratic Republic of Congo – Table CD.World Bank: Land Use, Protected Areas and National Wealth. Rural land area below 5m is the total rural land area in square kilometers where the elevation is 5 meters or less.; ; Center for International Earth Science Information Network (CIESIN)/Columbia University. 2013. Urban-Rural Population and Land Area Estimates Version 2. Palisades, NY: NASA Socioeconomic Data and Applications Center (SEDAC). http://sedac.ciesin.columbia.edu/data/set/lecz-urban-rural-population-land-area-estimates-v2.; Sum;

This CD consists of the TIGER/Line Census Files, 1990. The type of File is geographic. The 1990 Census TIGER/Line file is an extract of selected geographic and cartographic information from the Census Bureau's TIGER data base. The Census Bureau is releasing the 1990 Census TIGER/Line files to provide data users with the final 1990 census boundaries (including voting districts) and to support the 1990 Census Data Products Program. The 1990 Census TIGER/Line file provides digital data for all 1 990 census map features and boundaries, the associated 1990 census final tabulation geographic area codes (such as 1990 census block numbers), and the codes for the January 1, 1990 legal and statistical areas on both sides of each line segment of every mapped feature. This version also contains the final voting district codes and the 1990 census designated place codes. The 1990 Census TIGER/Line file contains basic information for 1990 census geographic area codes, basic map features and their names, and address ranges in the form of 12 'Record Types.' The record types are as follows: 1. Basic Data Records (Individual Feature Segment Records) 2. Shape Coordinate Points (Feature Shape Records) 3. Additional Decennial Census Geographic Area Codes 4. Index to Alternate Feature Names 5. Feature Name List 6. Additional Address Range and ZIP Code(2) Information 7. Landmark Features 8. Area Landmarks A. Additional Polygon Geographic Area Codes I. Area Boundaries P. Polygon Location R. Record Number Range Each segment record contains appropriate decennial census and, when appropriate, FIPS(1) geographic area codes, latitude/longitude coordinates for all line segments and point features, the name of the feature Geographic Coverage: The 1990 Census TIGER/Line files cover the entire United States, Puerto Rico, the Virgin Islands of the United States, American Samoa, Guam, the Northern Mariana Islands, Palau, the other Pacific entities that were part of the Trust Territo ry of the United States for the 1980 census (the Marshall Islands and the Federated States of Micronesia), and the Midway Islands (to provide complete mapping within the boundaries of the State of Hawaii). The data in the 1990 Census TIGER/Line files include information comparable to what was in the 1980 GBF/DIME-Files, which covered roughly 2 percent of the land area of the United States. The remaining 98 percent of the land area has been added using data that originated with the U.S. Geological Survey (USGS) based on the 1:100,000-scale USGS maps, supplemented with Census Bureau-compiled information and from other USGS map sheets. NOSB= Note to Users: This CD is part of a collection located in the Data Archive of the Odum Institute for Research in Social Science, at the University of North Carolina at Chapel Hill. The collection is located in Room 10, Manning Hall. Users may check the CDs out subscribing to the honor system. Items can be checked out for a period of two weeks. Loan forms are located adjacent to the collection.

Congo, The Democratic Republic of the CD: Urban Land Area Where Elevation is Below 5 Meters data was reported at 26.014 sq km in 2010. This stayed constant from the previous number of 26.014 sq km for 2000. Congo, The Democratic Republic of the CD: Urban Land Area Where Elevation is Below 5 Meters data is updated yearly, averaging 26.014 sq km from Dec 1990 (Median) to 2010, with 3 observations. The data reached an all-time high of 26.014 sq km in 2010 and a record low of 26.014 sq km in 2010. Congo, The Democratic Republic of the CD: Urban Land Area Where Elevation is Below 5 Meters data remains active status in CEIC and is reported by World Bank. The data is categorized under Global Database’s Democratic Republic of Congo – Table CD.World Bank: Land Use, Protected Areas and National Wealth. Urban land area below 5m is the total urban land area in square kilometers where the elevation is 5 meters or less.; ; Center for International Earth Science Information Network (CIESIN)/Columbia University. 2013. Urban-Rural Population and Land Area Estimates Version 2. Palisades, NY: NASA Socioeconomic Data and Applications Center (SEDAC). http://sedac.ciesin.columbia.edu/data/set/lecz-urban-rural-population-land-area-estimates-v2.; Sum;

Congo, The Democratic Republic of the CD: Rural Land Area Where Elevation is Below 5 Meters: % of Total Land Area data was reported at 0.021 % in 2010. This stayed constant from the previous number of 0.021 % for 2000. Congo, The Democratic Republic of the CD: Rural Land Area Where Elevation is Below 5 Meters: % of Total Land Area data is updated yearly, averaging 0.021 % from Dec 1990 (Median) to 2010, with 3 observations. The data reached an all-time high of 0.021 % in 2010 and a record low of 0.021 % in 2010. Congo, The Democratic Republic of the CD: Rural Land Area Where Elevation is Below 5 Meters: % of Total Land Area data remains active status in CEIC and is reported by World Bank. The data is categorized under Global Database’s Democratic Republic of Congo – Table CD.World Bank: Land Use, Protected Areas and National Wealth. Rural land area below 5m is the percentage of total land where the rural land elevation is 5 meters or less.; ; Center for International Earth Science Information Network (CIESIN)/Columbia University. 2013. Urban-Rural Population and Land Area Estimates Version 2. Palisades, NY: NASA Socioeconomic Data and Applications Center (SEDAC). http://sedac.ciesin.columbia.edu/data/set/lecz-urban-rural-population-land-area-estimates-v2.; Weighted average;

Congo, The Democratic Republic of the CD: Population Living in Areas Where Elevation is Below 5 Meters: % of Total Population data was reported at 0.041 % in 2010. This records an increase from the previous number of 0.041 % for 2000. Congo, The Democratic Republic of the CD: Population Living in Areas Where Elevation is Below 5 Meters: % of Total Population data is updated yearly, averaging 0.041 % from Dec 1990 (Median) to 2010, with 3 observations. The data reached an all-time high of 0.041 % in 2010 and a record low of 0.039 % in 1990. Congo, The Democratic Republic of the CD: Population Living in Areas Where Elevation is Below 5 Meters: % of Total Population data remains active status in CEIC and is reported by World Bank. The data is categorized under Global Database’s Democratic Republic of Congo – Table CD.World Bank: Land Use, Protected Areas and National Wealth. Population below 5m is the percentage of the total population living in areas where the elevation is 5 meters or less.; ; Center for International Earth Science Information Network (CIESIN)/Columbia University. 2013. Urban-Rural Population and Land Area Estimates Version 2. Palisades, NY: NASA Socioeconomic Data and Applications Center (SEDAC). http://sedac.ciesin.columbia.edu/data/set/lecz-urban-rural-population-land-area-estimates-v2.; Weighted average;

Congo, The Democratic Republic of the CD: Rural Population Living in Areas Where Elevation is Below 5 Meters: % of Total Population data was reported at 0.017 % in 2010. This records a decrease from the previous number of 0.018 % for 2000. Congo, The Democratic Republic of the CD: Rural Population Living in Areas Where Elevation is Below 5 Meters: % of Total Population data is updated yearly, averaging 0.017 % from Dec 1990 (Median) to 2010, with 3 observations. The data reached an all-time high of 0.018 % in 2000 and a record low of 0.009 % in 1990. Congo, The Democratic Republic of the CD: Rural Population Living in Areas Where Elevation is Below 5 Meters: % of Total Population data remains active status in CEIC and is reported by World Bank. The data is categorized under Global Database’s Democratic Republic of Congo – Table CD.World Bank.WDI: Land Use, Protected Areas and National Wealth. Rural population below 5m is the percentage of the total population, living in areas where the elevation is 5 meters or less.; ; Center for International Earth Science Information Network (CIESIN)/Columbia University. 2013. Urban-Rural Population and Land Area Estimates Version 2. Palisades, NY: NASA Socioeconomic Data and Applications Center (SEDAC). http://sedac.ciesin.columbia.edu/data/set/lecz-urban-rural-population-land-area-estimates-v2.; Weighted average;