Gist 3512176

Gist 3512183

This visualization demonstrates the spatial layout of a map overlay structure using an XML-based prototype definition. It renders the hierarchical relationships between nodes and their child elements as a force-directed graph, computed with `d3.forceSimulation`. The code uses an XSLT file to parse the prototype’s field definitions, mapping the `children`, `addChildren`, and `removeChildren` attributes into visual nodes and links. Geographic context is implied through the `org:mpeg:mapoverlay` namespace, but no explicit map projection is applied; instead, the layout focuses on the structural connectivity of the data.

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Gist 3512188

This example visualizes the movement of map markers in a geographic space, showing how they respond to a simulated force field. It renders an interactive map using d3.geoPath for geographic outlines and d3.forceSimulation to drive the marker positions, which are defined as VRML97 prototypes with GPS coordinates. The markers’ locations update dynamically as the simulation runs, revealing the clustering and dispersion patterns of the data points. The code relies on XSLT to transform the input data into the visualization structure, with marker properties like position stored in vector2 fields.

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Map test

This example displays a full-screen interactive map embedded from Carto Builder, presenting geographic data in a standard tiled web-mapping interface. The page itself uses an iframe element to load the external Carto visualization, while D3 v4 is loaded via a script tag but is not actively used for rendering or interaction. The map includes pan and zoom controls provided by the Carto platform, and the overall layout is fixed to the viewport with zero margins for a seamless presentation. The code primarily demonstrates a simple integration pattern between a hosting page and a third-party mapping service, rather than a custom D3 visualization.

CCartophile

Gist 3512045

This visualization maps the structure of X3D scene-graph definitions by rendering an XML schema as a network of nodes and links. It shows how complex types, elements, and attribute groups interconnect through references and inheritance. The code uses D3.js’s `forceSimulation` to compute node positions and SVG paths to draw links between schema components. Node sizes and colors encode type hierarchy, while the XSLT source file is parsed to extract these relationships. The rendering approach relies on standard SVG elements and D3’s data-binding to reflect the schema’s nested dependencies.

Gist 3511866

This visualization demonstrates an MPEG AugmentationRegion proto-declaration, defining how augmented-reality content is anchored to a 2D region and tracked through translation and rotation fields. It shows the structural relationship between source data, provider identifiers, and 2D coordinates, with event outputs for changes in position, orientation, and error states. The example uses the XSLT file format to declare the proto, leveraging fields like `Vector2Array` and `Vector3Array` for spatial data, while enabling toggles via a Boolean `enabled` field. The rendering relies on the proto’s XML schema, not a specific charting library, focusing on the data model rather than visual output.

Map Tiles in D3

This interactive map demo, animated with D3, shows map tiles being loaded and positioned as users progressively zoom and pan. It provides a proof-of-concept for tile-based mapping using only D3, avoiding dedicated map libraries. The visualization fetches OpenStreetMap tiles from MapQuest’s tile server, addressing them by column, row, and zoom level. The animation uses D3's selection and transition methods, applying CSS 3D transforms via `matrixString` for smooth scaling, and manages a request queue for efficient image loading. The code demonstrates DOM manipulation and coordinate logic borrowed from Modest Maps, with a fallback to standard CSS transforms.

RRandomEtc

Gist 6414125

This example demonstrates interactive panning and zooming over a map of U.S. states and counties using SVG. It uses `d3.behavior.zoom` to control the map’s transform, while `d3.geo.path` renders the TopoJSON data from the `us.json` file. The zoom event updates the map’s translate and scale attributes, and stroke widths adjust inversely to the zoom level. Buttons also allow resetting the view or disabling the zoom event entirely.

11wheel

68% match