viewof map = {
const container = html`<div style="height:600px;">`;
let resolve;
container.value = new Promise(_ => resolve = _);
yield container; // Give the container dimensions.
const map = new maplibregl.Map({
// interactive: false,
boxZoom: true, // use shift+drag to create bounding box, "zoom to" follows
pitch: 0,
bearing: 0,
maplibreLogo: true,
container,
center: [-70.2568, 43.6591], zoom: 13, // Portland, ME
style: "https://basemaps.cartocdn.com/gl/voyager-gl-style/style.json",
scrollZoom: true
});
map.addControl(new maplibregl.NavigationControl());
// Set map limits
map.setMinZoom(10);
map.setMaxZoom(15);
map.on('load', () => {
map.addSource("contour-source", {
type: "vector",
tiles: [
demSource.contourProtocolUrl({
// convert meters to feet, default=1 for meters
multiplier: 3.28084,
thresholds: {
10: 5,
11: 5,
12: 5,
13: 5,
14: 5,
15: 5,
// zoom: [minor, major]
// 9: [200, 1000],
// 10: [200, 1000],
// 11: [200, 1000],
// 12: [100, 500],
// 14: [50, 200],
// 15: [20, 100],
},
// optional, override vector tile parameters:
contourLayer: "contours",
elevationKey: "ele",
levelKey: "level",
extent: 4096,
buffer: 1,
}),
],
maxzoom: 15,
});
map.addLayer({
id: "contour-lines",
type: "line",
source: "contour-source",
"source-layer": "contours",
paint: {
"line-color": "rgba(0,0,0, 50%)",
// level = highest index in thresholds array the elevation is a multiple of
"line-width": ["match", ["get", "level"], 1, 1, 0.5],
},
});
})
resolve(map); // See: https://observablehq.com/@mbostock/mapbox-fly-to
invalidation.then(() => map.remove());
}
maplibregl = require("maplibre-gl")
mlcontour = require("maplibre-contour")
demSource = {
const demSource = new mlcontour.DemSource({
// url: "https://elevation-tiles-prod.s3.amazonaws.com/terrarium/{z}/{x}/{y}.png", encoding: "terrarium", // THIS WORKS
url: "https://pbogden.github.io/geo/xyz/{z}/{x}/{y}.png", encoding: "mapbox", // DOES NOT WORK
maxzoom: 15,
});
demSource.setupMaplibre(maplibregl);
return demSource
}
<link href="https://unpkg.com/maplibre-gl/dist/maplibre-gl.css" rel="stylesheet" />
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