CA Zip Code Map part II

CA Zip Code Map part IIA

This visualization displays California zip code boundaries as a green choropleth map on a Mercator projection, centered on the state’s coordinates. Using d3.geoPath and d3.geoMercator, it renders SVG paths from GeoJSON data loaded from a GitHub repository. The map supports interactive zooming and panning via d3.zoom, with hover effects that turn individual zip codes red and show their five-digit identifiers as tooltips. The code relies on D3 v5’s modular imports for selection, projection, and event handling, with styling defined in CSS.

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CA Zip Code Map

This example renders a choropleth-style map of California zip code boundaries using SVG. It loads GeoJSON data from a GitHub repository and draws each zip code region as a path with a green fill and black outline. The code uses d3.json and d3.geoPath with a d3.geoMercator projection centered on California, scaling the map to fit the viewport. The visualization provides a static geographic overview of all zip code areas in the state.

CA Zip Code Map

CA Zip Code Map Part 2B

This example maps California zip code boundaries, coloring each region light blue with a red hover highlight. It visualizes stroke mortality data by zip code, though the chart itself displays the geographic shapes without encoding the count values in the fill. The map uses a Mercator projection with d3.geoPath and d3.geoMercator, rendering SVG paths from a GeoJSON file of California zip codes. The stroke data is loaded from a CSV, and the map supports pan-and-zoom interaction through d3.zoom.

CA Zip Code Map part III

This map displays California zip code boundaries colored green, with stroke mortality counts from 2016 stored in a CSV file. The visualization uses D3 v5’s `geoMercator` projection and `geoPath` to render GeoJSON zip code polygons as SVG paths, while `d3.zoom` enables pan and zoom interactions. Hovering highlights regions in red, though the code does not yet bind the CSV count data to the map shapes.

CA Zip Code Map Part 2C

This example displays a choropleth-style map of California zip codes, with each region colored light blue and highlighted red on hover. The visualization renders stroke mortality counts for 2016 by overlaying zip code boundaries from a GeoJSON file onto a Mercator projection. The code uses D3 v5’s `geoMercator`, `geoPath`, and `zoom` to create an interactive, pannable SVG map, while stroke data from a CSV file is joined to the geographic features via zip code identifiers.

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CA Zip Code Map Part 1B

This map displays California’s zip code boundaries as green polygons with thin black outlines on a gray background. It loads GeoJSON data from the OpenDataDE GitHub repository and renders the state using a projected `geoMercator` centered at coordinates [-120, 37], with `d3.geoPath` generating the SVG path strings. The visualization sets the map scale to 3.3 times the width and translates it to the center of the SVG canvas, delivering a static, full-state view without interactivity.

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CA Zip Code Map Part 2B.1

This example maps California zip code boundaries and overlays stroke mortality data from a CSV file. Each zip code polygon is rendered using `d3.geoPath` with a Mercator projection, and hover effects highlight individual regions. The visualization supports pan and zoom interactions through the `d3.zoom` API. The GeoJSON data comes from an external GitHub repository, and the stroke counts are joined to the map by zip code, though the counts themselves are not visually encoded.