The map shows the rate of COVID-19 cases calculated as the total number of cases per 10,000 residents (all cases since testing began on March 2nd). The map initially displays the rates by neighborhood, zoom in to see rates for smaller areas (census tracts).
Because of variability in the data, the rate of cases is not calculated for areas with fewer than twenty cases. These areas are shaded with a grey dotted pattern.
To protect the privacy of residents, the City does not disclose an area's number of confirmed cases if it is less than ten. In addition, no case data is displayed for areas with resident populations of fewer than 1,000 people. These areas are dark grey on the map.
This map displays cumulative case rates to highlight differences in rates across the City. The map legend and colors are based on the underlying distribution of the data (ck-means method). Because the data changes every day, the map legend for both neighborhood and census tracts may adjust as the data distributions change.