## installation ``` yarn add vector-tiles-generator ```
npm install vector-tiles-generator
yarn add vector-tiles-generator
usage with express
JavaScript
var VectorTileGenerator = require('vector-tiles-generator');// initialize once your generator
var vectorTileGenerator = new VectorTileGenerator({
pgPool: pool // you must provide your own pg-pool
});
app.get('/layer/:z/:x/:y.mvt', function(req, res) {
var tile = {
x: parseInt(req.params.x),
y: parseInt(req.params.y),
z: parseInt(req.params.z)
};
// nothing before zoom level 9
if(tile.z < 9) {
return res.status(204).send(); // 204 empty status for mapbox
}
return vectorTileGenerator.get({
points:
SELECT name, ST_AsGeoJSON(ST_Transform(way, 4326)) as the_geom_geojson // !bbox! will be replaced
}, tile)
.then(function(result) {
if(!result || result.length === 0) {
return res.status(204).send(); // handle empty status for mapbox
}
return res.send(result);
});
});
``