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January 2, 2020 14:22
World Map with Zoom slider and Zoom and Pan options
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| code | city | country | lat | lon | |
|---|---|---|---|---|---|
| ZNZ | ZANZIBAR | TANZANIA | -6.13 | 39.31 | |
| TYO | TOKYO | JAPAN | 35.68 | 139.76 | |
| AKL | AUCKLAND | NEW ZEALAND | -36.85 | 174.78 | |
| BKK | BANGKOK | THAILAND | 13.75 | 100.48 | |
| DEL | DELHI | INDIA | 29.01 | 77.38 | |
| SIN | SINGAPORE | SINGAPOR | 1.36 | 103.75 | |
| BSB | BRASILIA | BRAZIL | -15.67 | -47.43 | |
| RIO | RIO DE JANEIRO | BRAZIL | -22.90 | -43.24 | |
| YTO | TORONTO | CANADA | 43.64 | -79.40 | |
| IPC | EASTER ISLAND | CHILE | -27.11 | -109.36 | |
| SEA | SEATTLE | USA | 47.61 | -122.33 |
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| <html> | |
| <head> | |
| <style> | |
| path { | |
| stroke:white; | |
| stroke-width: 0.5px; | |
| fill:#EBEBE0; | |
| } | |
| #float-button-group { | |
| position:fixed; | |
| left:10; | |
| opacity:0.5; | |
| } | |
| #float-button-group:hover { | |
| opacity:1; | |
| } | |
| #map { | |
| background: skyblue; | |
| width: 965px; | |
| height: 505px; | |
| border: 3px solid steelblue; | |
| } | |
| #map-zoomer { | |
| position:absolute; | |
| writing-mode: bt-lr; | |
| -webkit-appearance: slider-vertical; | |
| width: 8px; | |
| height: 100px; | |
| padding: 0 5px; | |
| position: absolute; | |
| top:110px; | |
| left:22px; | |
| } | |
| </style> | |
| </head> | |
| <body> | |
| <div id="map"> | |
| <div class="btn-group-vertical" role="group" aria-label="..." id="float-button-group"> | |
| <button type="button" class="btn btn-default" id="zoom-in"><span class="glyphicon glyphicon-zoom-in" aria-hidden="true"></span></button> | |
| <button type="button" class="btn btn-default" id="zoom-out"><span class="glyphicon glyphicon-zoom-out" aria-hidden="true"></span></button> | |
| <button type="button" class="btn btn-default" id="reset"><span class="glyphicon glyphicon-screenshot" aria-hidden="true"></span></button> | |
| </div> | |
| <input type="range" value="1" min="1" max="8" orient="vertical" id="map-zoomer"/> | |
| </div> | |
| <script type="text/javascript" src="http://cdnjs.cloudflare.com/ajax/libs/jquery/2.1.4/jquery.min.js"></script> | |
| <script type="text/javascript" src="http://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.3.4/js/bootstrap.min.js"></script> | |
| <script src="http://d3js.org/d3.v3.min.js"></script> | |
| <script src="http://d3js.org/topojson.v0.min.js"></script> | |
| <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.2/css/bootstrap.min.css"> | |
| <script> | |
| var width = d3.select('#map').node().getBoundingClientRect().width, | |
| height = d3.select('#map').node().getBoundingClientRect().height; | |
| var center = [width / 2, height / 2]; | |
| var projection = d3.geo.mercator() | |
| .center([0, 10]); | |
| var svg = d3.select("#map") | |
| .append("svg") | |
| .attr("width", width) | |
| .attr("height", height); | |
| var path = d3.geo.path() | |
| .projection(projection); | |
| var g = svg.append("g"); | |
| d3.json("world-110m2.json", function (error, topology) { | |
| g.selectAll("path") | |
| .data(topojson.object(topology, topology.objects.countries).geometries) | |
| .enter() | |
| .append("path") | |
| .attr("d", path); | |
| d3.csv("cities.csv", function (error, cities) { | |
| svg.selectAll("circle") | |
| .data(cities) | |
| .enter() | |
| .append("circle") | |
| .attr("cx", function (d) { | |
| return projection([d.lon, d.lat])[0]; | |
| }) | |
| .attr("cy", function (d) { | |
| return projection([d.lon, d.lat])[1]; | |
| }) | |
| .attr("r", 5) | |
| .style("fill", "red"); | |
| }); | |
| }); | |
| var zoom = d3.behavior.zoom() | |
| .scaleExtent([1, 8]) | |
| .on("zoom", function () { | |
| g.attr("transform", "translate(" + d3.event.translate.join(",") + ") scale(" + d3.event.scale + ")"); | |
| g.selectAll("path") | |
| .attr("d", path.projection(projection)); | |
| svg.selectAll("circle") | |
| .attr("transform", "translate(" + d3.event.translate.join(",") + ") scale(" + d3.event.scale + ")") | |
| .transition() | |
| .attr("r", 5 / d3.event.scale); | |
| d3.select("#map-zoomer").node().value = zoom.scale(); | |
| }); | |
| svg.call(zoom); | |
| d3.select('#zoom-in').on('click', function () { | |
| var scale = zoom.scale(), extent = zoom.scaleExtent(), translate = zoom.translate(); | |
| var x = translate[0], y = translate[1]; | |
| var factor = 1.2; | |
| var target_scale = scale * factor; | |
| if (scale === extent[1]) { | |
| return false; | |
| } | |
| var clamped_target_scale = Math.max(extent[0], Math.min(extent[1], target_scale)); | |
| if (clamped_target_scale != target_scale) { | |
| target_scale = clamped_target_scale; | |
| factor = target_scale / scale; | |
| } | |
| x = (x - center[0]) * factor + center[0]; | |
| y = (y - center[1]) * factor + center[1]; | |
| zoom.scale(target_scale).translate([x, y]); | |
| g.transition().attr("transform", "translate(" + zoom.translate().join(",") + ") scale(" + zoom.scale() + ")"); | |
| g.selectAll("path") | |
| .attr("d", path.projection(projection)); | |
| svg.selectAll("circle") | |
| .transition() | |
| .attr("transform", "translate(" + zoom.translate().join(",") + ") scale(" + zoom.scale() + ")") | |
| .attr("r", 5 / zoom.scale()); | |
| d3.select("#map-zoomer").node().value = zoom.scale(); | |
| }); | |
| d3.select('#zoom-out').on('click', function () { | |
| var scale = zoom.scale(), extent = zoom.scaleExtent(), translate = zoom.translate(); | |
| var x = translate[0], y = translate[1]; | |
| var factor = 1 / 1.2; | |
| var target_scale = scale * factor; | |
| if (scale === extent[0]) { | |
| return false; | |
| } | |
| var clamped_target_scale = Math.max(extent[0], Math.min(extent[1], target_scale)); | |
| if (clamped_target_scale != target_scale) { | |
| target_scale = clamped_target_scale; | |
| factor = target_scale / scale; | |
| } | |
| x = (x - center[0]) * factor + center[0]; | |
| y = (y - center[1]) * factor + center[1]; | |
| zoom.scale(target_scale).translate([x, y]); | |
| g.transition() | |
| .attr("transform", "translate(" + zoom.translate().join(",") + ") scale(" + zoom.scale() + ")"); | |
| g.selectAll("path") | |
| .attr("d", path.projection(projection)); | |
| svg.selectAll("circle") | |
| .transition() | |
| .attr("transform", "translate(" + zoom.translate().join(",") + ") scale(" + zoom.scale() + ")") | |
| .attr("r", 5 / zoom.scale()); | |
| d3.select("#map-zoomer").node().value = zoom.scale(); | |
| }); | |
| d3.select('#reset').on('click', function () { | |
| zoom.translate([0, 0]); | |
| zoom.scale(1); | |
| g.transition().attr("transform", "translate(" + zoom.translate().join(",") + ") scale(" + zoom.scale() + ")"); | |
| g.selectAll("path") | |
| .attr("d", path.projection(projection)) | |
| svg.selectAll("circle") | |
| .transition() | |
| .attr("transform", "translate(" + zoom.translate().join(",") + ") scale(" + zoom.scale() + ")") | |
| .transition() | |
| .attr("r", 5 / zoom.scale()); | |
| d3.select("#map-zoomer").node().value = zoom.scale(); | |
| }); | |
| d3.select('#map-zoomer').on("change", function () { | |
| var scale = zoom.scale(), extent = zoom.scaleExtent(), translate = zoom.translate(); | |
| var x = translate[0], y = translate[1]; | |
| var target_scale = +this.value; | |
| var factor = target_scale / scale; | |
| var clamped_target_scale = Math.max(extent[0], Math.min(extent[1], target_scale)); | |
| if (clamped_target_scale != target_scale) { | |
| target_scale = clamped_target_scale; | |
| factor = target_scale / scale; | |
| } | |
| x = (x - center[0]) * factor + center[0]; | |
| y = (y - center[1]) * factor + center[1]; | |
| zoom.scale(target_scale).translate([x, y]); | |
| g.transition() | |
| .attr("transform", "translate(" + zoom.translate().join(",") + ") scale(" + zoom.scale() + ")"); | |
| g.selectAll("path") | |
| .attr("d", path.projection(projection)); | |
| svg.selectAll("circle") | |
| .transition() | |
| .attr("transform", "translate(" + zoom.translate().join(",") + ") scale(" + zoom.scale() + ")") | |
| .attr("r", 5 / zoom.scale()); | |
| }); | |
| </script> | |
| </body> | |
| </html> |
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