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topogram

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Create continuous area cartograms with TopoJSON and D3

github.com/shawnbot/topogram

shawnbot/topogram

23 lines (17 loc) • 564 B
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OGR ?= ogr2ogr -F GeoJSON TOPOJSON ?= ../../topojson/bin/topojson --id-property name SIMPLIFY ?= 24 all: \ us-states.topojson \ us-states-segmentized.topojson us-states-segmentized.geojson: us-states.geojson $(OGR) -segmentize 0.5 $@ $< us-states.topojson: us-states.geojson $(TOPOJSON) --simplify $(SIMPLIFY) -o $@ $< perl -pi -e "s/us-states/states/g" $@ us-states-segmentized.topojson: us-states-segmentized.geojson $(TOPOJSON) -o $@ $< perl -pi -e "s/us-states-segmentized/states/g" $@ clean: rm -f us-states-segmentized.geojson rm -f *.topojson