Not to be confused with a website of the same name that used to be (but no longer is) maintained by mass.gov, this nice demographic mapping service was created with Maptitude for the Web mapping software by the Caliper Corporation, a GIS mapping and technology company based in Newton. It provides a nice array of comparative state maps for a variety of statistical fields, including basic demographics, education, housing, crime, politics, health, and more. Note the pop-open window at the bottom of the opening screen that allows you to look for city-specific figures. Some statistics, like those at many other sites, are based on the 2000 Census. Others that come from state agencies are sometimes more recent.