{ "culture": "en-US", "name": "", "guid": "", "catalogPath": "", "snippet": "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.\n\nLevel: \nOwner: \nUpdated: \nFrequency:", "description": "

The TIGER/Line Files are shapefiles and related database files (.dbf) that 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 File is designed to stand alone as an independent data set, or they can be combined to cover the entire nation. Census Blocks are statistical areas bounded on all sides by visible features, such as streets, roads, streams, and railroad tracks, and/or by nonvisible boundaries such as city, town, township, and county limits, and short line-of-sight extensions of streets and roads. Census blocks are relatively small in area; for example, a block in a city bounded by streets. However, census blocks in remote areas are often large and irregular and may even be many square miles in area. A common misunderstanding is that data users think census blocks are used geographically to build all other census geographic areas, rather all other census geographic areas are updated and then used as the primary constraints, along with roads and water features, to delineate the tabulation blocks. As a result, all 2010 Census blocks nest within every other 2010 Census geographic area, so that Census Bureau statistical data can be tabulated at the block level and aggregated up to the appropriate geographic areas. Census blocks cover all territory in the United States, Puerto Rico, and the Island Areas (American Samoa, Guam, the Commonwealth of the Northern Mariana Islands, and the U.S. Virgin Islands). Blocks are the smallest geographic areas for which the Census Bureau publishes data from the decennial census. A block may consist of one or more faces.<\/SPAN><\/P>

The Census Bureau's geographic identifiers and demographic data included in this feature class <\/SPAN>were selected and retrieved from the U.S. Census American Factfinder <\/SPAN><\/SPAN>by Prince William County Department of Information Technology (DoIT), Geographic Information Systems (GIS) Division: Brian Engelmann, Demographer (x 7098).<\/SPAN><\/P><\/DIV><\/DIV><\/DIV>", "summary": "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.\n\nLevel: \nOwner: \nUpdated: \nFrequency:", "title": "GISPROD.DEMOGRAPHIC.Blocks_10", "tags": [ "County or Equivalent Entity", "boundaries", "tabulation", "County or equivalent entity", "Polygon", "Block", "Census Block", "boundaries", "U.S.", "United States", "County or equivalent entity", "Prince William", "51153", "Polygon" ], "type": "", "typeKeywords": [], "thumbnail": "", "url": "", "minScale": 500000, "maxScale": 5000, "spatialReference": "", "accessInformation": "U.S. Census Bureau; Prince William County Department of Information Technology (DoIT), Geographic Information Systems (GIS) Division", "licenseInfo": "

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>

  • This data is for reference purposes only and should not be used for design work. <\/SPAN><\/P><\/LI>

  • Prince William County hereby disclaims any and all liability or responsibility for any damage, injury, loss, claim, or lawsuit arising from any error, inaccuracy or other problem with either the digital maps contained with digital data delivery or digital data delivered. The User hereby releases the County, its officers, agents and all employees and volunteers, from all liability, damage, claims, injuries or suits arising from any such error, inaccuracy or problem. Furthermore, the User agrees to indemnify and hold harmless the County and its officers, agents and all employees and volunteers, from any and all claims, liability damages, injuries and suits arising from the use of the digital maps and data therein or thereon by the User, its employees or assignees, or by any third parties. <\/SPAN><\/P><\/LI>

  • Prince William County reserves the right to deny access to certain datasets. <\/SPAN><\/P><\/LI>

  • The digital maps and data provided hereunder are provided ''as is'' and the County expressly disclaims all warranties, UCC and otherwise, express or implied including warranties as to accuracy of the digital maps, data and merchantability and fitness for a particular purpose, and further expressly disclaims responsibility for all incidental, consequential or special damages arising out of or in connection with the use or performance of the digital maps and data. <\/SPAN><\/P><\/LI>

  • User acknowledges this disclaimer of warranty and expressly waives all warranties express or implied and waives any right of claim for damages incidental, consequential or special, arising out of or in connection with the use or performance of the digital maps and data.<\/SPAN><\/P><\/LI><\/UL><\/DIV><\/DIV><\/DIV>" }