The reliability of the data presented is excellent because the U.S. census bureau administers the site.
Another good site is found at the University of Virginia. The URL for the site is http://fisher.lib.virginia.edu/collections/stats/histcensus/. The name is referred to as the Historical Census Browser. Data for each census from 1790 to 1960 is available. This resource is outstanding because the data is organized neatly in charts and graphs. There also is a function called “MapIt” that will create a chloropleth map for any data set. The data would be very accurate because the University of Virginia is a well-respected institution of higher education. Poor information would lessen their academic standing.
A third site with census data is the Tiger mapping service of the U.S. census bureau. The URL is http://tiger.census.gov/. This information is excellent but the maps are difficult to produce. The service is slow and the maps do not offer much flexibility as far as manipulating data and copying. The information is dependable because it comes from the U.S. census bureau.
A great site for gathering census data on the country of Brazil is found at URL http://www.ibge.gov.br/english/. The IBGE is the Brazilian equivalent of the U.S. census bureau. It differs in that this agency seems much more concerned with gathering statistical data on agricultural and geographical data and not just population data. The site has an official feel to it and it is obviously administered by a governmental agency. The major drawback is some of the reports and statistics are not presented in English. The home page has an English option, but other parts of the site are not yet translated.
A second site that gives census statistics for foreign trade is the U.S. census bureau at URL http://www.census.gov/foreign-trade/balance/c3510.html. Though this census information is specific to foreign trade with the U.S. it still is a good,