d3-tile wrapping

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.

76% match

d3-tile tileSize

This example demonstrates how the `tileSize` method of the d3-tile library controls the pixel dimensions of individual map tiles. It renders a zoomable, pannable Mapbox map as SVG, with a form control to toggle between different tile sizes. The map uses `d3.tile()` to generate tile coordinates and `d3.geoMercator()` for projection, while tile images are fetched from Mapbox’s tile server. The code shows how changing `tile.tileSize` directly affects the resolution and number of tiles displayed at a given zoom level.

76% match

Tile by Bounding Box

This example demonstrates map tiles clipped to a geographic bounding box, showing California with a vector overlay of state boundaries. It uses the d3-tile library to load OpenStreetMap raster tiles, positioning them with an adjusted Mercator projection from d3.geoMercator. The projection scale and translation are computed from the bounding box, then snapped to the nearest power of two for crisp tile rendering. The SVG overlay draws a topojson mesh of U.S. states using d3.geoPath, while the tile images are appended as absolutely-positioned img elements.

75% 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.

74% match

Vector Tiles

This interactive map displays vector tiles of road networks from OpenStreetMap, rendered as SVG paths. It uses Mapzen’s vector tile API to load road data, and d3.geoMercator’s projection with a d3.tile-based tile system to fetch and display 256×256 tiles. The visualization supports pan and zoom via d3.zoom, with a matrix3d transform for scaling and translation. Mouse movement updates a location readout showing latitude and longitude, computed by inverting the projection.

74% match

Raster & Vector I

This example overlays vector street data from a TopoJSON file onto raster map tiles from OpenStreetMap. The visualization uses d3-tile to fetch and position the image tiles, while d3.geoPath renders a black mesh of road lines over them. The map is centered on Detroit using a Mercator projection configured with d3.geoMercator. Both the raster tiles and the vector streets are drawn as SVG elements, combining the two data types in a single static view. The code also loads the TopoJSON with d3.json and converts it to a mesh using the topojson library.

73% 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.

73% match

Tile Viewer

This example shows a zoomable map interface where the user can pan and zoom across geographic tiles. It displays each tile as a numbered 256-by-256-pixel square with a red border and its coordinates as text, updating the visible grid as the viewport changes. The code uses d3.geo.tile, d3.geo.mercator, and d3.behavior.zoom, applying a CSS 3D matrix transform to reposition tiles during zoom events. It relies on a gist by mbostock and the d3.v3 library, with tile positions computed from the current zoom scale and translation.