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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.Field Definiiton:STATEFP10 - 2010 Census State FIPS codesCOUNTYFP10 - 2010 Census County FIPS CodesTRACTCE10 - 2010 Census Census Tract codeBLOCKCE10 - 2010 Census Census block codeGEOID10 - \"Census block group identifier; a concatenation of 2010 Census state FIPS code, county FIPS code, and census tract code, and the block group number\"NAME10 - 2010 Census translated legal/statistical area description and the block group numberMTFCC10 - 2010 Census MAF/TIGER featture class codeUR10 - 2010 Census Urban/RuralUACE10 - 2010 Census Urban AreaFUNCSTAT10 - 2010 Census Functional Statitical CodeALAND10 - 2010 Census Area LandAWATER10 - 2010 Census Area waterINTPTLAT10 - 2010 Census Internal Point (Latitude)INTPTLON10 - 2010 Census Internal Point (Longtitude)POPULATION - Total PopulationHOUSING_UNITS - Total Housing units", "geometryType": "esriGeometryPolygon", "sourceSpatialReference": { "wkid": 102646, "latestWkid": 2230 }, "copyrightText": "US 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