Tile by Bounding Box

Tile by Bounding Box

This example demonstrates how to automatically position map tiles from OpenStreetMap to fit a specified geographic bounding box, using a Mercator projection. The code calculates the necessary scale and translation to center the bounding box, adjusts the projection with `d3.geoMercator()`, and generates the appropriate tile URLs via `d3.tile()`. A vector outline of US states, rendered with `d3.geoPath()`, is overlaid on the raster tiles to show the projection's alignment.

88% match

Clipped Map Tiles

This example clips MapBox Natural Earth II raster tiles to the outline of the United States, which is loaded as TopoJSON. Using the d3.geo.tile plug-in and a d3.geo.mercator projection, it generates a grid of image tiles and applies a clipPath referencing the land outline. The stroke class adds a black outline, and the code dynamically selects tile URLs from MapBox subdomains.

81% match

Raster & Vector II

A map of the United States uses a red outline to show state boundaries over OpenStreetMap raster tiles. The code combines d3-tile for tile loading, d3.geoMercator and d3.geoPath for reprojecting TopoJSON vectors, and d3-zoom for pan and zoom. On each interaction, the tile set and vector geometry are recomputed rather than relying on a transform, with tiles rendered as SVG images.

78% match

Raster & Vector 4.0

This example shows an interactive map of the United States with OpenStreetMap raster tiles overlaid by a vector outline of US counties. It combines zooming and panning with a Mercator projection. The code uses D3 v4.0 alpha, the d3-tile library for tile loading, and d3.geoPath with TopoJSON to render county boundaries. As the user zooms, the vector path’s stroke-width adjusts to maintain a constant screen-space width, while the raster tiles dynamically load from OpenStreetMap servers.

77% match

Vector Tiles

This example displays vector-tiled map data, rendering both road networks and building footprints over San Francisco. The visualization loads GeoJSON tiles from an external OpenStreetMap vector-datasource service and projects them using `d3.geo.mercator` and `d3.geo.path`. It employs the custom `d3.geo.tile` helper to compute visible tile coordinates at the current zoom level, then asynchronously fetches and draws each tile’s features as SVG paths. Road types are distinguished by stroke colors, while buildings appear as solid black polygons.

76% match

Raster & Vector II

This example presents a hybrid vector-raster map of the United States, seamlessly blending OpenStreetMap raster tiles with red vector state boundaries. The visualization handles interactive pan and zoom, reprojecting the TopoJSON geometry in real time to maintain alignment with the underlying tiles. The implementation leverages d3.geoMercator for projection, d3.tile for raster tile management, d3.zoom for interaction, and d3.geoPath for rendering vector paths. The raster layer is populated with images from OSM’s tile server, while the vector layer uses TopoJSON data from a gist source.

75% match

Vector Tiles

This example displays a static vector-tile map of San Francisco’s roads, with major highways, minor roads, and rail lines rendered as stylized SVG strokes. Using D3 v3, it loads Mapzen’s OpenStreetMap “roads” tiles via `d3.json`, sorts features by `sort_key`, and draws each path with `d3.geo.path` and a Mercator projection. A custom `d3.geo.tile` helper computes the visible tile range and scale, while CSS classes like `.highway` and `.rail` assign distinct colors and widths.

75% match

d3-tile wrapping

This example displays an interactive SVG world map using tiled raster images from OpenStreetMap, with tile-wrapping toggled by a checkbox. The visualization relies on the `d3-tile` library’s `tile.wrap` method to generate tile coordinates, and `d3.geoMercator` with `d3.geoPath` for the projection. An HTML form checkbox controls the `wrap` flag, triggering a `loadTiles` function that rebuilds the image layer. Each tile is fetched from the `a.b.c.tile.openstreetmap.org` subdomains. The map’s scale and translation are computed and applied via SVG group transforms.