D3 Examples - TP5_Données spatiales avec D3.js

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<!DOCTYPE html>
<head>
  <meta charset="utf-8">
  <script src="https://d3js.org/d3.v3.min.js"></script>
  <script src="https://d3js.org/queue.v1.min.js"></script>
  <style>
    body { margin:0;position:fixed;top:0;right:0;bottom:0;left:0; }
    div.tooltip {
        color: #222;
        background-color: #fff;
        padding: .5em;
        text-shadow: #f5f5f5 0 1px 0;
        border-radius: 2px;
        opacity: 0.9;
        position: absolute;
    }
    .legend {
      font-size: 12px;
    }
    rect {
      stroke-width: 2;
    }
  </style>
</head>
​
<body>
  <div>
    <input id="slider" type="range" value="1" min="1" max="100" step="1" />
    <span id="week">week </span>
  </div>
  <script>
        var width = 700,
          height = 580;
    
    var legendRectSize = 18;
    var legendSpacing = 4;
    
    var min_color,max_color,
    gridSize = Math.floor(width / 24),
          legendElementWidth = gridSize*2;
    
    var colors  = ["rgb(213,239,204)", "rgb(169,221,160)", "rgb(94,186,97)", "rgb(42,141,71)", "rgb(0,91,36)"];
​
        var svg = d3.select( "body" )
        .append( "svg" )
          .attr( "width", width )
          .attr( "height", height );
    
    var francejson_global;
​
    var projection =  d3.geo.conicConformal().center([2.454071, 46.279229]).scale(3000);
​
    var path = d3.geo.path()
                 .projection(projection);
    
    /*tooltip*/
    var tooltip = d3.select('body').append('div').attr('class', 'hidden tooltip');
    
    var color = d3.scale.quantize()
        .range(["rgb(213,239,204)", "rgb(169,221,160)", "rgb(94,186,97)", "rgb(42,141,71)", "rgb(0,91,36)"]);
    
    console.log("this is color domain : " + color.domain());
    
    queue()
      .defer(d3.json, 'regionsFrancaise.geojson.txt')
      .defer(d3.csv, 'GrippeFrance2014.csv')
        //.defer(d3.csv, 'GrippeFrance20032015.csv')    
      .await(processData);
      
    
    function processData(error,francejson,grippedata) {
      var max = -Infinity; //for the sake of color
      var min = Infinity;  //for the sake of color
      var numWeeks = Object.keys(grippedata[0]).length - 2;
      var listWeeks = Object.keys(grippedata[0]);
      d3.select('#slider').attr("max", numWeeks);
      //console.log(numWeeks);
      for (var i = 0; i < grippedata.length; i++){ 
        //Nom de l'etat
        var dataState = grippedata[i].region;
      
        //Valeur associee a l'etat
        var dataValue = Object.values(grippedata[i]);
        var tmp = Math.max(dataValue[1]) + 1;
        
        if (Math.max(dataValue[i]) > max) {
          max = Math.max(dataValue[i]);
        }
        if (Math.min(dataValue[i]) < min) {
          min = Math.min(dataValue[i]);
        }
            //Recherche de l'etat dans le GeoJSON
           for (var j = 0; j < francejson.features.length; j++) {
               var jsonState = francejson.features[j].properties.nom;
               if (dataState == jsonState) {
               //On injecte la valeur de l'Etat dans le json
               francejson.features[j].properties.value = dataValue;
               //Pas besoin de chercher plus loin
               break;
                }
                     }
        
        var colorScale = d3.scale.threshold()
        .domain([min, max])
        .range([0].concat(colors));
        
        color.domain([min, max]);
        console.log("this is min : " + min);
        console.log("this is max : " + max);
        // affect francejson_global for drawMap function
        francejson_global = francejson;
        drawMap(francejson, 1);
        
        var legend = svg.selectAll(".legend")
            .data(colorScale.domain(), function(d) { return d; })
            .enter().append("g")
            .attr("class", "legend");
​
        legend.append("rect")
            .attr("x", function(d, i) { return legendElementWidth * i; })
            .attr("y", height)
            .attr("width", legendElementWidth)
            .attr("height", gridSize / 2)
            .style("fill", function(d, i) { return colors[i]; });
​
        legend.append("text")
            .attr("class", "mono")
            .text(function(d) { return "≥ " + Math.round(d); })
            .attr("x", function(d, i) { return legendElementWidth * i; })
            .attr("y", height + gridSize);  
      }
      
      d3.select("#slider").on("input", function() {
        updateViz(+this.value);
      });
      
      function updateViz(value_slide){
        d3.select('#week').html("week: " + listWeeks[value_slide]); 
        drawMap(francejson_global, value_slide);
      }
      
      function drawMap(francejson, value_slide) {
          carte = svg.selectAll("path")
            .data(francejson.features);
​
          // code en cas de mise a jour de la carte / de changement de semaine
          carte
            .attr("class", "update")
            .style("fill", function(d) {
                        if(d.properties.value){
                    var value = d.properties.value[value_slide];
                      if (value) {
                        return color(value);
                      } else {
                        // si pas de valeur alors en gris
                        return "#ccc";
                      }
                  }else {
                    // si pas de valeur alors en gris
                    return "#ccc";
                  }
            })
            .on('mousemove', function(d) {
                  var mouse = d3.mouse(svg.node()).map(function(d) {
                    return parseInt(d);
                  });
                  tooltip.classed('hidden', false)
                    .attr('style', 'left:' + (mouse[0] + 15) +
                          'px; top:' + (mouse[1] - 35) + 'px')
                    .html(d.properties.nom + ":" +  d.properties.value[value_slide]);
            })
            .on('mouseout', function() {
                  tooltip.classed('hidden', true);
              });  
​
          // code pour la creation de la carte quand les donnees sont chargees la 1e fois.
          carte.enter()
            .append("path")
            .attr("class", "enter")
            .attr("d", path)
            .style("fill", function(d) {
                        if(d.properties.value){
                    var value = d.properties.value[value_slide];
                      if (value) {
                        return color(value);
                      } else {
                        // si pas de valeur alors en gris
                        return "#ccc";
                      }
                  }else {
                    // si pas de valeur alors en gris
                    return "#ccc";
                  }                  
            })
            .on('mousemove', function(d) {
                  var mouse = d3.mouse(svg.node()).map(function(d) {
                    return parseInt(d);
                  });
                  tooltip.classed('hidden', false)
                    .attr('style', 'left:' + (mouse[0] + 15) +
                          'px; top:' + (mouse[1] - 35) + 'px')
                    .html(d.properties.nom + ":" +  d.properties.value[value_slide]);
            })
            .on('mouseout', function() {
                  tooltip.classed('hidden', true);
              });  
        }
      
      /*
      var legend = svg.selectAll(".legend")
          .data(color.domain())
            .enter().append("g")
          .attr("class", "legend")
          .attr("transform", function(d, i) { 
            return "translate(0," + i * 20 + ")";                   
       });
      
      var legend = svg.selectAll('.legend')
          .data(color.domain())
          .enter().append('g')
          .attr('class', 'legend')
          .attr('transform', function(d, i) {
            var height = legendRectSize + legendSpacing;
            var offset =  height * color.domain().length / 2;
            var horz = -2 * legendRectSize;
            var vert = i * height - offset;
            return 'translate(' + horz + ',' + vert + ')';
      });*/
      
    }
   
  </script> 
​
</body>
​
    