Basic d3 Thailand map with hover info and zoomable when mouse click.
Thailand GeoJson Data: - apisit's thailand.json
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November 6, 2023 13:08
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D3 - Thailand Map
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| license: mit |
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| <!DOCTYPE html> | |
| <meta charset="utf-8"> | |
| <style> | |
| text.big-text{ | |
| font-size: 40px; | |
| font-weight: 400; | |
| position:absolute; | |
| top: 60px; | |
| left: 20px; | |
| z-index:99; | |
| float:left; | |
| } | |
| .map-layer { | |
| fill: #fff; | |
| stroke: #ddd; | |
| } | |
| </style> | |
| <body> | |
| <script src="http://d3js.org/d3.v3.min.js"></script> | |
| <script> | |
| var width = 960, | |
| height = 640, | |
| centered; | |
| var bigText = d3.select("body").append('text') | |
| .classed('big-text', true); | |
| var svg = d3.select("body").append("svg") | |
| .attr("width", width) | |
| .attr("height", height); | |
| // Add background | |
| svg.append('rect') | |
| .style("fill", "#fff") | |
| .attr('width', width) | |
| .attr('height', height) | |
| .on('click', clicked); | |
| var g = svg.append('g'); | |
| var mapLayer = g.append('g') | |
| .classed('map-layer', true); | |
| var xym = d3.geo.mercator(); | |
| var path = d3.geo.path().projection(xym); | |
| // Customize the projection to make the center of Thailand become the center of the map | |
| xym.rotate([-100.6331, -13.2]) | |
| xym.translate([width / 2, height / 2]) | |
| xym.scale(2380) | |
| d3.json("thailand.json", function(data) { | |
| mapLayer.selectAll("path").data(data.features) | |
| .enter().append("path") | |
| .attr("d", path) | |
| .attr('vector-effect', 'non-scaling-stroke') | |
| .style("fill", function() { return "#44aaee" }) | |
| .on("mouseover", mouseover) | |
| .on("mouseout", mouseout) | |
| .on("click", clicked) | |
| }); | |
| // Get province name | |
| function nameFn(d){ | |
| return d && d.properties ? d.properties.name: null; | |
| } | |
| function mouseover(d){ | |
| d3.select(this).style('fill', '#f90'); | |
| bigText.text(nameFn(d)); | |
| } | |
| function mouseout(d){ | |
| d3.select(this).style("fill", "#44aaee") | |
| // Reset province color | |
| mapLayer.selectAll('path') | |
| .style('fill', function(d){return centered && d===centered ? '#D5708B' : '#4ae';}); | |
| // Set Provice name | |
| if (centered) { | |
| bigText.text(nameFn(centered)); | |
| } else { | |
| bigText.text(''); | |
| } | |
| } | |
| // When clicked, zoom in | |
| function clicked(d) { | |
| var x, y, k; | |
| // Compute centroid of the selected path | |
| if (d && centered !== d) { | |
| var centroid = path.centroid(d); | |
| x = centroid[0]; | |
| y = centroid[1]; | |
| k = 4; | |
| centered = d; | |
| } else { | |
| x = width / 2; | |
| y = height / 2; | |
| k = 1; | |
| centered = null; | |
| } | |
| // Highlight the clicked province | |
| mapLayer.selectAll('path') | |
| .style('fill', function(d){return centered && d===centered ? '#D5708B' : '#44aaee';}); | |
| // Zoom | |
| g.transition() | |
| .duration(750) | |
| .attr('transform', 'translate(' + width / 2 + ',' + height / 2 + ')scale(' + k + ')translate(' + -x + ',' + -y + ')'); | |
| } | |
| </script> |
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