maps.chandlerswift.com/layers/amtrak-routes/layer.js

27 lines
765 B
JavaScript

import VectorLayer from 'ol/layer/Vector';
import {Vector as VectorSource} from 'ol/source.js';
import GeoJSON from 'ol/format/GeoJSON.js';
import {Style, Stroke} from 'ol/style.js';
import url from './data.geojson?url'; // TODO: remove `?url`?
const colors = '0,83,126'; // from their website's cookie banner, and other places
const vectorLayer = new VectorLayer({
source: new VectorSource({
url: url,
format: new GeoJSON,
}),
style: function(feature, resolution){
return new Style({
stroke: new Stroke({
color: `rgba(${colors},${Math.min(1, Math.pow(resolution/10, 1/4))})`,
width: 10/Math.pow(resolution, 1/4),
})
});
},
});
export default vectorLayer;