Very basic world map using d3-tile demonstrating the tile.wrap method.
Tiles courtesy of OpenStreetMap
forked from linusmarco's block: d3-tile wrapping
Last active
March 9, 2019 09:39
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d3-tile wrapping
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| license: MIT | |
| height: 500 | |
| scrolling: no | |
| border: yes |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| <!DOCTYPE html> | |
| <meta charset="utf-8"> | |
| <style> | |
| body { | |
| margin: 0; | |
| } | |
| form { | |
| margin: 20px; | |
| font-family: "Helvetica Neue", Helvetica, Arial, sans-serif; | |
| } | |
| </style> | |
| <form> | |
| <input type="checkbox" name="wrap" id="wrap"> | |
| <label for="wrap">Wrap tiles</label> | |
| </form> | |
| <svg></svg> | |
| <script src="https://d3js.org/d3.v4.min.js"></script> | |
| <script src="https://unpkg.com/d3-array@1.0"></script> | |
| <script src="https://unpkg.com/d3-tile@0.0"></script> | |
| <script> | |
| var pi = Math.PI, | |
| tau = 2 * pi; | |
| var width = 960, | |
| height = 300; | |
| var projection = d3.geoMercator() | |
| .scale(1 / tau) | |
| .translate([0, 0]); | |
| var path = d3.geoPath() | |
| .projection(projection); | |
| var svg = d3.select("svg") | |
| .attr("width", width) | |
| .attr("height", height); | |
| var raster = svg.append("g"); | |
| var scale = height; | |
| loadTiles(this.checked); | |
| d3.select("input#wrap") | |
| .on("change", function() { loadTiles(this.checked); }); | |
| function loadTiles(wrap) { | |
| var tiles = d3.tile() | |
| .wrap(wrap) | |
| .size([width, height]) | |
| .scale(scale) | |
| .translate([scale / 2, scale / 2]) | |
| (); | |
| var image = raster | |
| .attr("transform", stringify(tiles.scale, tiles.translate)) | |
| .selectAll("image") | |
| .data(tiles, function(d) { return d; }); | |
| image.exit().remove(); | |
| image.enter().append("image") | |
| .attr("xlink:href", function(d) { return "http://" + "abc"[d.y % 3] + ".tile.openstreetmap.org/" + d.z + "/" + d.x + "/" + d.y + ".png"; }) | |
| .attr("x", function(d) { return d.tx; }) | |
| .attr("y", function(d) { return d.ty; }) | |
| .attr("width", 256) | |
| .attr("height", 256); | |
| } | |
| function stringify(scale, translate) { | |
| var k = scale / 256, r = scale % 1 ? Number : Math.round; | |
| return "translate(" + r(translate[0] * scale) + "," + r(translate[1] * scale) + ") scale(" + k + ")"; | |
| } | |
| </script> |
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