class 4

class 4 - states

This example displays a map of the contiguous United States with earthquake locations overlaid as crimson points. The map is rendered using `d3.geoPath` with the `d3.geoAlbersUsa()` projection, while earthquake data is pulled from the USGS live GeoJSON feed. State boundaries come from a local US GeoJSON file processed with `topojson.feature`. The visualization also includes a static legend and interactive coordinate display, which updates as the mouse moves across the map. All drawing is performed with SVG elements.

95% match

class 4 - states

This visualization displays earthquakes recorded in the United States over the past week, color-coded by magnitude on a dark basemap of state boundaries. It uses D3.js v4 with the `d3.geoAlbersUsa` projection and `d3.geoPath` to render both the TopoJSON state outlines and GeoJSON earthquake points from the USGS real-time feed. The points are filtered into four magnitude bins and drawn with distinct colors, while a legend built with d3-legend explains the scale.

93% match

class 4 - states

This visualization shows earthquake activity across the United States over the past week, with points colored by magnitude using a green-to-red ordinal scale. The map displays state boundaries as gray paths, while earthquakes are layered as colored circles. It uses D3 v4, TopoJSON for state geometries via `d3.geoPath` with an Albers USA projection, and the USGS real-time earthquake feed. A d3-legend legend indicates magnitude ranges, and earthquakes are filtered into four classes.

92% match

class 4 - states

92% match

This example displays a map of the United States using D3 v4 and topojson, with a second layer of earthquake points from the USGS live feed. The map is rendered as SVG paths via the `d3.geoPath` and `d3.geoAlbersUsa` projections, while quake locations are drawn as crimson paths. A mouseover function uses `projection.invert` and `d3.mouse` to display the geographic coordinates of the cursor. Two separate `<g>` elements separate the state and earthquake layers.

class 3 - states

This visualization shows a map of the United States with earthquake locations overlaid, using a dark gray state outline on a blue background. It loads US state boundaries from a remote TopoJSON file and renders them with `d3.geoPath` using the `d3.geoAlbersUsa` projection. Earthquake data is fetched from the USGS GeoJSON feed and plotted as crimson circles. A mouse-move handler displays the current latitude and longitude in a separate text layer.

class 3 - states

class 3 - states

This example displays a map of US states rendered in gray with an Albers USA projection, overlaid with crimson points marking earthquake locations from the USGS live GeoJSON feed. It uses d3.geoPath for both state boundaries and earthquake points, with topojson to convert US state geometries. As the mouse moves over the map, a text display updates to show the geographic longitude and latitude in degrees, computed via projection.invert and d3.mouse. The visualization layers states and earthquakes in separate SVG groups, with a fixed SVG canvas sized 960 by 500 pixels.