Spatial Insights, Inc. today announced the release of a block centroid database based on the 2000 Census.
The block centroid database is available by county, state or nationwide. In addition to the coordinates and census identifiers, total population and the number of housing units are included with each of the block centroids. There are over 8.2 million block centroids nationwide. This contrasts with the roughly 208,000 block groups that provide complete coverage of the US.
“We’ve had an increasing number of requests from our clients for basic demographics at very detailed levels of geography and undertook the building of this database nationwide” said Don Segal, President of Spatial Insights. “This data enables our clients to better visualize and map important population distributions at the finest level of detail available”.
The block centroid data are available in MapInfoTM .tab, ESRI .shp, dBase, and delimited text file formats. Additional formats can be provided on an as-needed basis. Block boundaries are also available from Spatial Insights.
Detailed information about the block centroids, including pricing, is available online.
As a derivative product, Spatial Insights has also developed a population-weighted block group centroid file. In this file, the centroid of the block group is defined on the basis of the geographic and demographic characteristics of the census block centroids. This database is useful for visualizing the true population center of a block group. Information about the population-weighted block group centroid file is available online.
Spatial Insights, Inc. is a geographic information services company specializing in providing innovative project consulting and mapping services, customized software solutions and data products for commercial organizations. Based in Bethesda, MD the company is privately held.