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Simple CartoDB + D3 earthquake example
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| <!DOCTYPE html> | |
| <html> | |
| <head> | |
| <meta http-equiv="Content-Type" content="text/html;charset=utf-8"> | |
| <title>Easy earthquakes</title> | |
| <script src="http://d3js.org/d3.v3.min.js"></script> | |
| <script src="http://libs.cartocdn.com/cartodb.js/v2/cartodb.js"></script> | |
| <style type="text/css"> | |
| body{ | |
| background:white; | |
| } | |
| svg { | |
| width: 960px; | |
| height: 500px; | |
| } | |
| svg:active { | |
| cursor: move; | |
| cursor: -moz-grabbing; | |
| cursor: -webkit-grabbing; | |
| } | |
| circle { | |
| fill: none; | |
| stroke-width: 1.5px; | |
| } | |
| #first_layer path { | |
| fill-opacity:0.8; | |
| fill: none; | |
| stroke: black; | |
| stroke-width:0.5px; | |
| stroke-linecap: round; | |
| stroke-linejoin: round; | |
| } | |
| </style> | |
| </head> | |
| <body> | |
| <script type="text/javascript"> | |
| var first_layer = 'd3_world_borders'; | |
| var sql = new cartodb.SQL({ user: 'viz2', format: 'geojson', dp: 5}); | |
| // Define our SVG element outside our SQL functions | |
| var svg = d3.select("body") | |
| .append("svg") | |
| .call(d3.behavior.zoom() | |
| .on("zoom", redraw)) | |
| .append("g"); | |
| // Our projection. | |
| var xy = d3.geo.mercator(); | |
| xy.scale(1500); | |
| xy.center([-90,30]); | |
| svg.append("g").attr("id", "first_layer"); | |
| var path = d3.geo.path(); | |
| sql.execute("SELECT ST_Simplify(the_geom,0.01) as the_geom FROM {{table_name}} WHERE the_geom IS NOT NULL", {table_name: first_layer}) | |
| .done(function(collection) { | |
| svg.select("#first_layer") | |
| .selectAll("path") | |
| .data(collection.features) | |
| .enter().append("path") | |
| .attr("d", path.projection(xy)); | |
| }) | |
| .error(function(errors) { | |
| // console.log('Errors! Oh no!') | |
| }); | |
| var earthquakes; | |
| sql.execute("SELECT the_geom, quakedate, magnitude FROM {{table_name}} WHERE the_geom IS NOT NULL ORDER BY quakedate ASC", {table_name: 'earthquaked3'}) | |
| .done(function(collection) { | |
| earthquakes = collection.features; | |
| quake(); | |
| }); | |
| var i = 0; | |
| function quake() { | |
| var c = earthquakes[i]; | |
| svg.append("circle") | |
| .attr("cx", xy(c.geometry.coordinates)[0]) | |
| .attr("cy", xy(c.geometry.coordinates)[1]) | |
| .attr("r", 1) | |
| .style("fill", "red") | |
| .style("fill-opacity", 0.5) | |
| .style("stroke", "red") | |
| .style("stroke-opacity", 0.5) | |
| .transition() | |
| .duration(2000) | |
| .ease(Math.sqrt) | |
| .attr("r", c.properties.magnitude * 20) | |
| .style("fill-opacity", 1e-6) | |
| .style("stroke-opacity", 1e-6) | |
| .remove() | |
| setTimeout(quake, 200); | |
| i++; | |
| if (earthquakes.length==i) i = 0; | |
| } | |
| function redraw() { | |
| svg.attr("transform", "translate(" + d3.event.translate + ")scale(" + d3.event.scale + ")"); | |
| } | |
| </script> | |
| </body> | |
| </html> |
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