Gist 8393730

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Last edited Jan 13, 2014

Created on Jan 13, 2014

This example uses a GeoJSON FeatureCollection of three census tract polygons in Loudoun County, Virginia, to visualize geographic boundaries. The code loads the tract geometries and renders them with d3.geoPath, projecting the coordinates onto a map. It displays the tract shape as an outlined polygon, with each feature’s properties (such as GEOID10 and centroid latitude/longitude) available for potential labeling or styling. The visualization relies on D3’s geographic projection and path generation to draw the vector data directly onto an SVG canvas.

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