AlexanderDavidson

@AlexanderDavidson·7 public vizzes

Zoom and Rotating (Reprojecting)

This example demonstrates interactive zooming and rotating of a world map through a 3D scene, allowing for dynamic reprojection of the geography. The visualization combines D3.js for map rendering with A-Frame, a WebVR framework, to create a three-dimensional environment where the map can be manipulated. It uses the Datamaps library to render the world map with custom data fills and overlays like arcs and bubbles, while A-Frame's `a-scene` handles the 3D elements and camera controls. The map is rendered onto a canvas element, which is then used as a material on 3D objects within the scene.

Apr 21, 2017

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Zoom and Rotating (Reprojecting)

This example demonstrates map reprojection with zoom and rotation using D3 v4 and canvas rendering. It displays geographic data from `ne_110m_admin_0_sovereignty.geojson` and a graticule, drawn with `d3.geoPath` and a `d3.geoEquirectangular` projection that rotates over time via `d3.timer`. The scene is embedded in an A-Frame 0.5.0 environment with multiple canvas textures applied to 3D entities, including a sphere and plane, using the `draw-canvas` component.

Apr 21, 2017

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Zoom and Rotating (Reprojecting)

This example shows a world map rendered on interactive 3D objects—a plane and a sphere—inside an A-Frame virtual reality scene, with the map rotating continuously over time. The geographic data is drawn to a 2D canvas using `d3.geoEquirectangular` for the projection, `d3.geoPath` for generating paths, and `d3.geoGraticule` for the grid lines. A `d3.timer` controls the animation loop, while an A-Frame component (`draw-canvas`) updates the canvas texture on the 3D entities. The map geojson includes country polygons from a natural earth dataset.

Apr 21, 2017

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Zoom and Rotating (Reprojecting)

This example demonstrates a dynamic equirectangular world map that is rendered onto a canvas and then applied as a texture to both a plane and a sphere in a 3D A-Frame scene, allowing for zoom and rotation. The map, sourced from a GeoJSON file, uses `d3.geoEquirectangular` projection and a `d3.geoPath` generator to draw graticules and country boundaries. A `d3.timer` drives continuous redraws to the canvas, while the A-Frame `draw-canvas` component integrates it into the virtual environment, with the sphere and camera controls enabling interactive reprojection.

Apr 21, 2017

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Zoom and Rotating (Reprojecting)

This example shows a continuously rotating and reprojecting world map rendered onto a canvas texture inside a 3D A-Frame scene. It demonstrates how geographic data can be integrated with WebVR-style environments, drawing country polygons, graticules, and the sphere outline using D3 v4’s `d3.geoMercator` projection, `d3.geoPath`, and `d3.geoGraticule`. The animation runs via `d3.timer`, updating the projection rotation each frame and clearing/redrawing the canvas context. The map uses GeoJSON world land data loaded from `land.geojson` and displays alongside a simple A-Frame box primitive.

Apr 20, 2017

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Zoom and Rotating (Reprojecting)

This example shows a continuously rotating world map rendered on a Canvas element, with countries and a graticule drawn in grayscale against a dark sphere. Using D3 v4’s `d3.geoMercator` projection, `d3.geoPath`, and `d3.geoGraticule`, the code redefines the projected sphere each frame via a `d3.timer` that increments the rotation speed. Land polygons are loaded from a local `land.geojson` file, and the animation highlights how reprojection affects visible geography as the globe spins.

Apr 20, 2017

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Gist 075cee318faa9088bc16bd9eb985a9a5

This example shows a world map rendered from a TopoJSON file using a Mercator projection, with pan and zoom enabled for interactive exploration. The map is drawn as SVG paths via `d3.geoPath` and a `d3.geoMercator` projection, centered and scaled to display global geography. A `d3.zoom` handler updates the map’s transform and re-projects paths on each interaction. The code includes commented-out attempts to plot city coordinates from a CSV, but the visible implementation focuses solely on the country boundaries from the `world-110m2.json` data source.

Apr 20, 2017