The Center for Urban Research maps, based on data from the 2000 Census and 2010 Census, display the predominant race or ethnic group at the block level in these urban regions–Baltimore, Boston, ...

But as a map by cartographer Nik Freeman proves ... As of the 2010 census, the United States consists of 11,078,300 Census Blocks. Of them, 4,871,270 blocks totaling 4.61 million square kilometers ...

To start exploring the map, click on a census block — the smallest unit captured by NYPD data. A pop-up will appear, showing the number of shooting incidents that occurred in that census block ...

Roll over the "White Population," "Black Population" or "Hispanic Population" bars below the map to show the racial and ethnic breakdown of each census block group — roughly the size of most ...

Usually on maps, we see the places where people live. But mapmaker Nik Freeman decided it would be interesting to see where people don’t live. By taking data from the U.S. census blocks ...

Take this fairly typical example from the two of what are called census block group areas that make ... “Bad data makes bad maps.” ...