make-tile

make-tile — Convert geojson to tile

A highly efficient JavaScript library for making vector tile from GeoJSON data on the fly.

Resulting tiles conform to the JSON equivalent
of the vector tile specification.
To make data rendering and interaction fast, the tiles are simplified,
retaining the minimum level of detail appropriate for each zoom level
(simplifying shapes, filtering out tiny polygons and polylines).

$3

``js
// build an tile
const tile = makeTile(geoJSON, options, { x: 149, y: 86, z: 6 });

`

$3

You can fine-tune the results with an options object,
although the defaults are sensible and work well for most use cases.

`js
const tle = makeTile(
data,
{
maxZoom: 14, // max zoom to preserve detail on; can't be higher than 24
tolerance: 3, // simplification tolerance (higher means simpler)
extent: 4096, // tile extent (both width and height)
buffer: 64, // tile buffer on each side
lineMetrics: false, // whether to enable line metrics tracking for LineString/MultiLineString features
promoteId: null, // name of a feature property to promote to feature.id. Cannot be used with generateId
generateId: false, // whether to generate feature ids. Cannot be used with promoteId
indexMaxPoints: 100000 // max number of points per tile in the index
},
{
x: 149,
y: 86,
z: 6
}
);
`

The promoteId and generateId options ignore existing id values on the feature objects.

$3

Install using NPM (npm install make-tile) or Yarn (yarn add make-tile), then:

`js
// import as a ES module
import makeTile from 'make-tile';

// or require in Node / Browserify
const makeTile = require('make-tile');
``