GeoJSON Vector Tiles

A highly efficient JavaScript library for slicing GeoJSON data into vector tiles (or rather their JSON equivalent) on the fly, primarily for rendering purposes.

Created to power GeoJSON rendering in Mapbox GL JS, but can be useful for other data visualization purposes.

Usage

// build an initial index of tiles
var tileIndex = geojsonvt(geoJSON, {
	baseZoom: 14, // max zoom to preserve detail on
	maxZoom: 14, // zoom to slice down on first pass
	maxPoints: 100, // during first pass, stop slicing each tile below this number of points
	debug: 0 // debug level: 1 = some timing info; 2 = individual tiles timing;
});

// request a particular tile
var features = tileIndex.getTile(z, x, y).features;

Demo

To see a geojson-vt in action, run npm run build-dev, then open debug/index.html in your browser and drag any GeoJSON on the page. It was tested on files up to 100Mb: