Here is the actual map, which you can zoom into, scroll, pan, explore your neighborhood, etc. -- http://demographics.coopercenter.org/DotMap/index.html EDIT: Exploring, I see the island I live on -- Manhattan -- has the four main dot colors well represented, though mainly in blocks. The main mixing is between whites and Asians and between blacks and Hispanics. Notably parts of the Upper West Side, East Village/Lower…
...he mentions use of a summary file, "SF1", and there's some kind of PDF here:
--> http://www.census.gov/prod/www/decennial.html#y2010tecdoc
--> http://www.census.gov/prod/cen2010/doc/sf1.pdf
It's more or less, a user manual for roughly 300 other tables, but where are they? Is the actual census data itself available freely, in detail?
I think this is it:
--> http://www2.census.gov/census_2010/04-Summary_File_1/
New York, as an example:
--> http://www2.census.gov/census_2010/04-Summary_File_1/New_Yor...
--> http://www2.census.gov/census_2010/04-Summary_File_1/New_Yor...
Is this the original, actual source data?