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Another important update! Map version 12.6 release displays missing values with cross hatched lines and features that are not populated enough to compute a statistically significant outcome (our rule is less than 100 population count) are colored light gray.
Fig. 1 – Census tracts 1950, % Black Population. Notice New Jersey has missing data so it is crossed out, and some tracts in NY are grayed out because not enough people live there.