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These data are based upon work supported by the National Institutes of Health and the National Science Foundation. Its purpose is twofold. First, the NHGIS created and freely distributes a database incorporating all available aggregate census information for the United States between 1790 and 2010. The database contains information for a wide variety of statistical (blocks, block groups, census tracts, metropolitan statistical areas, etc.) and administrative units (places, minor civil divisions, counties, states, etc.). Second, the NHGIS produced and freely distributes boundary files for small areas (census tracts and counties) in the United States. Boundary files for tracts are available for the 1910-2010 decennial censuses and American Community Survey releases, and boundary files for counties and states/territories are available for the 1790-2010 decennial censuses and American Community Survey releases. The boundaries contained in this file do not necessarily represent current legal boundaries. Instead, they represent the boundaries over which the U.S. Census Bureau tabulated and published data at that time.
In order for others to use the information in the Census MAF/TIGER database in a geographic information system (GIS) or for other geographic applications, the Census Bureau releases to the public extracts of the database in the form of TIGER/Line Shapefiles. |
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These data are based upon work supported by the National Institutes of Health and the National Science Foundation. Its purpose is twofold. First, the NHGIS created and freely distributes a database incorporating all available aggregate census information for the United States between 1790 and 2010. The database contains information for a wide variety of statistical (blocks, block groups, census tracts, metropolitan statistical areas, etc.) and administrative units (places, minor civil divisions, counties, states, etc.). Second, the NHGIS produced and freely distributes boundary files for small areas (census tracts and counties) in the United States. Boundary files for tracts are available for the 1910-2010 decennial censuses and American Community Survey releases, and boundary files for counties and states/territories are available for the 1790-2010 decennial censuses and American Community Survey releases. The boundaries contained in this file do not necessarily represent current legal boundaries. Instead, they represent the boundaries over which the U.S. Census Bureau tabulated and published data at that time.
In order for others to use the information in the Census MAF/TIGER database in a geographic information system (GIS) or for other geographic applications, the Census Bureau releases to the public extracts of the database in the form of TIGER/Line Shapefiles. |
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5000 |
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[] |
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<DIV STYLE="text-align:Left;"><P STYLE="margin:0 0 0 0;"><SPAN><SPAN>The NHGIS is a National Institutes of Health and National Science Foundation-sponsored project to create a digital spatial-temporal database of all available historical US aggregate census materials. The available shapefiles on the NHGIS sit represent version 2.0 of historical boundary files for the 1790 to 2010 decennial censuses and American Community Survey releases.</SPAN></SPAN></P><DIV><P><SPAN>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. The primary legal divisions of most states are termed counties. In Louisiana, these divisions are known as parishes. In Alaska, which has no counties, the equivalent entities are the organized boroughs, city and boroughs, municipalities, and for the unorganized area, census areas. The latter are delineated cooperatively for statistical purposes by the State of Alaska and the Census Bureau. In four states (Maryland, Missouri, Nevada, and Virginia), there are one or more incorporated places that are independent of any county organization and thus constitute primary divisions of their states. These incorporated places are known as independent cities and are treated as equivalent entities for purposes of data presentation. The District of Columbia and Guam have no primary divisions, and each area is considered an equivalent entity for purposes of data presentation. The Census Bureau treats the following entities as equivalents of counties for purposes of data presentation: Municipios in Puerto Rico, Districts and Islands in American Samoa, Municipalities in the Commonwealth of the Northern Mariana Islands, and Islands in the U.S. Virgin Islands. The entire area of the United States, Puerto Rico, and the Island Areas is covered by counties or equivalent entities. The boundaries for counties and equivalent entities are as of January 1, 2016, primarily as reported through the Census Bureau's Boundary and Annexation Survey (BAS).</SPAN></P></DIV></DIV> |
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<DIV STYLE="text-align:Left;"><P STYLE="margin:0 0 0 0;"><SPAN><SPAN>This dataset was produced with an intended application at the state/territory, regional or national level. Appropriate uses include thematic mapping of census data and spatial analysis of census data. These unaltered data may be redistributed by a third party. If these data are altered or incorporated into another dataset, they are not to be redistributed without also: altering the name of the dataset, including a Content Standards for Digital Geospatial Metadata (FGDC-STD-001-1998) compliant metadata file that describes the dataset and reflects the alteration steps that makes the new dataset different from this one, and citing this dataset in the metadata as a source for the altered dataset using the source citation specified below. If these digital data are used in the production of a report or in the compilation of a standalone printed map, then this dataset is to be cited in the report or on the map using the source citation specified below. The following source citation should be used when citing this dataset: Minnesota Population Center. National Historical Geographic Information System: Version 2.0, Minneapolis: MN, University of Minnesota 2011. No fee may be charged for use or distribution. Publications and research reports based on the database must cite it appropriately. Users are requested to send a copy of any publications, research reports, or educational material making use of the data or documentation. Printed matter should be sent to: NHGIS Minnesota Population Center University of Minnesota 50 Willey Hall 225 19th Avenue South Minneapolis, MN 55455.</SPAN></SPAN></P><DIV><P><SPAN>The TIGER/Line Shapefile products are not copyrighted however TIGER/Line and Census TIGER are registered trademarks of the U.S. Census Bureau. These products are free to use in a product or publication, however acknowledgement must be given to the U.S. Census Bureau as the source. The boundary information in the TIGER/Line Shapefiles are for statistical data collection and tabulation purposes only; their depiction and designation for statistical purposes does not constitute a determination of jurisdictional authority or rights of ownership or entitlement and they are not legal land descriptions.Coordinates in the TIGER/Line shapefiles have six implied decimal places, but the positional accuracy of these coordinates is not as great as the six decimal places suggest.</SPAN></P></DIV></DIV> |
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| title:
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uspatial.lakebrowser.lakebrowser_county |
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| tags:
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["NGDA","Governmental Units and Administrative and Statistical Boundaries Theme","National Geospatial Data Asset","Nation","Polygon","County","Borough","Parish","Municipio","Boundaries"] |
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en-US |
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