New York Block Groups by mbostock

13,837 census block groups; 13,866 polygons. 2.1M TopoJSON, 620K gzipped. Made by customizing the makefile in the U.S. Atlas project:

topojson \
    -o ny.json \
    --projection 'd3.geo.mercator().center([-75.819, 42.795]).scale(6193).translate([480, 350]).precision(0)' \
    -q 1e5 \
    -s .5 \
    -- blockgroups=shp/ny/blockgroups.shp

New York Block Groups

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