Published
Edited
Jun 5, 2020
md`# My Own Map Tiles`
map = {
const svg = d3.create("svg")
.attr("viewBox", [0, 0, width, height]);
const tile = d3.tile()
.extent([[0, 0], [width, height]])
.tileSize(512)
.clampX(false);
const zoom = d3.zoom()
.scaleExtent([1 << 8, 1 << 22])
.extent([[0, 0], [width, height]])
.on("zoom", () => zoomed(d3.event.transform));
let image = svg.append("g")
.attr("pointer-events", "none")
.selectAll("image");
svg
.call(zoom)
.call(zoom.transform, d3.zoomIdentity
.translate(width >> 1, height >> 1)
.scale(1 << 12));
function zoomed(transform) {
const tiles = tile(transform);
image = image.data(tiles, d => d).join("image")
.attr("xlink:href", d => url(...d3.tileWrap(d)))
.attr("x", ([x]) => (x + tiles.translate[0]) * tiles.scale)
.attr("y", ([, y]) => (y + tiles.translate[1]) * tiles.scale)
.attr("width", tiles.scale)
.attr("height", tiles.scale);
}
return svg.node();
}
url = (x, y, z) => `https://api.mapbox.com/styles/v1/mapbox/streets-v11/tiles/${z}/${x}/${y}${devicePixelRatio > 1 ? "@2x" : ""}?access_token=pk.eyJ1IjoibWJvc3RvY2siLCJhIjoiY2s5ZWRlbTM4MDE0eDNocWJ2aXR2amNmeiJ9.LEyjnNDr_BrxRmI4UDyJAQ`
height = 600
d3 = require("d3@5", "d3-tile@1")
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