e970c58310dec1965283 by mpmckenna8

index.html

<!DOCTYPE html>
<meta charset="utf-8">
<style>

.background {
  fill: none;
  pointer-events: all;
}

#states {
  fill: #aaaaaa;
}

#states .active {
  fill: #ff0000;
  fill-opacity: .5;
}

#state-borders {
  fill: none;
  stroke: #ffffff;
  stroke-width: 1.5px;
  stroke-linejoin: round;
  stroke-linecap: round;
  pointer-events: none;
}

path.link {
  fill: none;
  stroke: #666666;
  stroke-width: 1.5px;
}

.stroke {
  fill: none;
  stroke: #000;
  stroke-width: 3px;
}

.fill {
  fill: #fff;
}

.graticule {
  fill: none;
  stroke: #777;
  stroke-width: .5px;
  stroke-opacity: .5;
}

.route {
  fill: none;
  stroke: blue;
  stroke-width: 3px;
}

</style>
<body>
    <h2>
      <span>NASA Centers</span>
    </h2>

<script src="//d3js.org/d3.v3.min.js"></script>
<script src="//d3js.org/d3.geo.projection.v0.min.js"></script>
<script src="//d3js.org/topojson.v1.min.js"></script>
<script>

var width = 1000,
    height = 600,
    centered;

var projection = d3.geo.albersUsa()
    .scale(1070)
    .translate([width / 2, height / 2]);

var path = d3.geo.path()
    .projection(projection);

var graticule = d3.geo.graticule();

var svg = d3.select("body").append("svg")
    .attr("width", width)
    .attr("height", height);

var g = svg.append("g");

var places = {
    GSFC: [-76.852587, 38.991621],
    KSC: [-80.650813, 28.524963]
    };

var route = {
  type: "LineString",
  coordinates: [
    places.GSFC,
    places.KSC
  ]
};

// Setup groups
// --------------------------------------
// Add groups for arcs and images. If arcs are added before images, they
//  will appear under the images.
// order is important
var stateGroup = g.append('g');
var arcGroup = g.append('g');
var imageGroup = g.append('g');
var pointGroup = g.append('g');

// Also, text needs to be added to the `g` group
var point = pointGroup.append("g")
    .attr("class", "points")
  .selectAll("g")
    .data(d3.entries(places))
  .enter().append("g")
    .attr("transform", function(d) { return "translate(" + projection(d.value) + ")"; });

point.append("text")
    .attr("y", 5)
    .attr("dx", "1em")
    .text(function(d) { return d.key; });

d3.json("us.json", function(error, us) {
    // draw states
    stateGroup.append("g")
      .attr("id", "states")
    .selectAll("path")
      .data(topojson.feature(us, us.objects.states).features)
    .enter().append("path")
      .attr("d", path)
      .on("click", clicked);

    stateGroup.append("path")
      .datum(topojson.mesh(us, us.objects.states, function(a, b) { return a !== b; }))
      .attr("id", "state-borders")
      .attr("d", path);

    d3.csv("nasacenters.csv", function(error, data) {
        // Draw images after drawing paths.
        imageGroup.selectAll("image").data([0])
           .data(data)
           .enter()
           .append("image")
            .attr("xlink:href", "nasalogo.png")
            .attr("width", "30")
            .attr("height", "30")
            .attr("x", function(d) {
                   return projection([d.lon, d.lat])[0]-15;
            })
            .attr("y", function(d) {
                   return projection([d.lon, d.lat])[1]-15;
            })

        // --- Helper functions (for tweening the path)
        var lineTransition = function lineTransition(path) {
            path.transition()
                //NOTE: Change this number (in ms) to make lines draw faster or slower
                .duration(5500)
                .attrTween("stroke-dasharray", tweenDash)
                .each("end", function(d,i) { 
                    ////Uncomment following line to re-transition
                    //d3.select(this).call(transition); 
                    
                    //We might want to do stuff when the line reaches the target,
                    //  like start the pulsating or add a new point or tell the
                    //  NSA to listen to this guy's phone calls
                    //doStuffWhenLineFinishes(d,i);
                });
        };
        var tweenDash = function tweenDash() {
            //This function is used to animate the dash-array property, which is a
            //  nice hack that gives us animation along some arbitrary path (in this
            //  case, makes it look like a line is being drawn from point A to B)
            var len = this.getTotalLength(),
                interpolate = d3.interpolateString("0," + len, len + "," + len);

            return function(t) { return interpolate(t); };
        };

        // --- Add paths
        // Format of object is an array of objects, each containing
        //  a type (LineString - the path will automatically draw a greatArc)
        //  and coordinates 
        var links = [
            {
                type: "LineString",
                    coordinates: [
                        [ data[0].lon, data[0].lat ],
                        [ data[1].lon, data[1].lat ]
                    ]
            }
        ];

        // you can build the links any way you want - e.g., if you have only
        //  certain items you want to draw paths between
        // Alterntively, it can be created automatically based on the data
        links = [];
        for(var i=0, len=data.length-1; i<len; i++){
            // (note: loop until length - 1 since we're getting the next
            //  item with i+1)
            links.push({
                type: "LineString",
                coordinates: [
                    [ data[i].lon, data[i].lat ],
                    [ data[i+1].lon, data[i+1].lat ]
                ]
            });
        }

        // Standard enter / update 
        var pathArcs = arcGroup.selectAll(".arc")
            .data(links);

        //enter
        pathArcs.enter()
            .append("path").attr({
                'class': 'arc'
            }).style({ 
                fill: 'none',
            });

        //update
        pathArcs.attr({
                //d is the points attribute for this path, we'll draw
                //  an arc between the points using the arc function
                d: path
            })
            .style({
                stroke: '#0000ff',
                'stroke-width': '2px'
            })
            // Uncomment this line to remove the transition
            .call(lineTransition); 

        //exit
        pathArcs.exit().remove();

    });

});

function clicked(d) {
  var x, y, k;

  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;
  }

  g.selectAll("path")
      .classed("active", centered && function(d) { return d === centered; });

  g.transition()
      .duration(750)
      .attr("transform", "translate(" + width / 2 + "," + height / 2 + ")scale(" + k + ")translate(" + -x + "," + -y + ")")
      .style("stroke-width", 1.5 / k + "px");
}

    </script>
  </body>
</html>

nasacenters.csv

code,center,lat,lon
GSFC,Goddard Space Flight Center,38.991621,-76.852587
KSC,Kennedy Space Center,28.524963,-80.650813
JPL,Jet Propulsion Laboratory,34.200463,-118.176008
DFRC,Dryden Flight Research Center,34.613714,-118.076790
GRC,Glenn Research Center,41.415891,-81.861774
MSFC,Marshall Space Flight Center,34.646554,-86.674368
ARC,Ames Research Center,37.409574,-122.064292
LaRC,Langley Research Center,37.092123,-76.376230
JSC,Johnson Space Center,29.551508,-95.092256
SSC,Stennis Space Center,30.363692,-89.600036