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US Map practice

✓ Published0🌍 Public
AAndre J Denais
Last edited Jul 29, 2021
Created on Jul 29, 2021

This example shows a static map of US counties and state boundaries rendered in SVG, with each county path filled in grey and state interior borders drawn in a distinct teal color. The visualization uses D3 v5’s `geoPath` with a `geoIdentity` projection that applies `reflectY(true)` to flip the map vertically. React components load TopoJSON from the US Atlas package (`counties-albers-10m.json`), converting it to GeoJSON features via `feature` and `mesh` from TopoJSON, then fitting the projection to a 960×500 viewport with `fitExtent`. The map includes county polygons and state outline meshes, with styling defined in an external CSS file.

AI-generated description

MA Geo Map of MA School Districts - loading JSON.

Got it to flip using identity.reflectY.

MIT Licensed

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