This polygon shapefile depicts boundaries of Census Designated Places (CDPs) in the County of Sacramento, California as of 2010. A Census Designated Place (CDP) is a concentration of population identified by the United States Census Bureau for statistical purposes. Census Blocks are statistical areas bounded on all sides by visible features, such as streets, roads, streams, railroad tracks, and/or by nonvisible boundaries such as city, town, township, 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 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. CDPs are an upward aggregation of Blocks. CDPs are closely settled, named, unincorporated communities that generally contain a mixture of residential, commercial and retail areas similar to those found in incorporated places of similar sizes. This layer is part of a collection of data managed by Sacramento County, California. The Sacramento County Geographic Information Systems (GIS) unit falls under the purview of the Sacramento County Department of Technology and is tasked with initiating, integrating and promoting the use of GIS Technology in the support of County business goals and objectives. This coverage can be used for basic applications, such as viewing, querying and map output production, or to provide a base map to support graphical overlays and analyses of geospatial data. Sacramento County GIS. (2011). Census Designated Places: Sacramento County, California, 2010. Sacramento County, California. Available at http://purl.stanford.edu/sj040qj6030. Sacramento County makes no representations about the suitability of these GIS data for any purpose. All such data are provided "as is" without warranty of any kind. Sacramento County hereby disclaims all warranties and conditions with regard to these data, including all implied warranties and conditions of merchantability, fitness for a particular purpose, title and non-infringement. In no event shall Sacramento County be liable for any special, indirect or consequential damages or any damages whatsoever resulting from loss of use, data or profits, whether in an action of contract, negligence or other tort action, arising out of or in connection with the use or performance of software, documents, provision of or failure to provide services, or information available from these data. These data could include technical inaccuracies or typographical errors. Changes are periodically added to the information herein. Furthermore, Sacramento County and/or its respective suppliers may make improvements and/or changes in these data at any time. This layer is presented in the WGS84 coordinate system for web display purposes. Downloadable data are provided in native coordinate system or projection.