vt-pbf

    3.1.3 • Public • Published

    vt-pbf CircleCI

    Serialize Mapbox vector tiles to binary protobufs in javascript.

    Usage

    As far as I know, the two places you might get a JS representation of a vector tile are geojson-vt and vector-tile-js. These both use slightly different internal representations, so serializing each looks slightly different:

    From vector-tile-js

    var vtpbf = require('vt-pbf')
    var VectorTile = require('@mapbox/vector-tile').VectorTile
    var Protobuf = require('pbf')
    
    var data = fs.readFileSync(__dirname + '/fixtures/rectangle-1.0.0.pbf')
    var tile = new VectorTile(new Protobuf(data))
    var orig = tile.layers['geojsonLayer'].feature(0).toGeoJSON(0, 0, 1)
    
    var buff = vtpbf(tile)
    fs.writeFileSync('my-tile.pbf', buff)

    From geojson-vt

    var vtpbf = require('vt-pbf')
    var geojsonVt = require('geojson-vt')
    
    var orig = JSON.parse(fs.readFileSync(__dirname + '/fixtures/rectangle.geojson'))
    var tileindex = geojsonVt(orig)
    var tile = tileindex.getTile(1, 0, 0)
    
    // pass in an object mapping layername -> tile object
    var buff = vtpbf.fromGeojsonVt({ 'geojsonLayer': tile })
    fs.writeFileSync('my-tile.pbf', buff)

    vtpbf.fromGeojsonVt takes two arguments:

    • layerMap is an object where keys are layer names and values are a geojson-vt tile,
    • options is an object (optional argument). There are 2 supported keys: version to define the version of the mvt spec used and extent to define the extent of the tile. version defaults to 1 and extent to 4096.

    Keywords

    none

    Install

    npm i vt-pbf

    DownloadsWeekly Downloads

    485,322

    Version

    3.1.3

    License

    MIT

    Unpacked Size

    12 kB

    Total Files

    5

    Last publish

    Collaborators

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