U.S. Census Block Centroid Populations represents the populations of the U.S. Census blocks as centroids for the United States. U.S. Census blocks nest within all other tabulated census geographic entities and are the basis for all tabulated data.
Logical consistency: The shapefile is converted to SDC (Smart Data Compression) format using tools in ArcGIS. The SDC data set is then imported into a file geodatabase to verify, validate, and if needed repair the geometry. Horizontal position accuracy: The geospatial part of this data set was calculated from latitude and longitude coordinates. The horizontal positional accuracy is unknown. Other data details: After processing, the data set is checked for drawing display and number of records and file sizes compared with source materials.
Notes:
U.S. Census Block Centroid Populations provides population and other demographic information for each U.S. Census block centroid within the United States. Largest scale when displaying the data: 1:100,000. Ground condition: 2010; publication date: 2011, 20111027. Vector digital data.
