【发布时间】：2015-12-15 15:58:26
【问题描述】：
我有一个用 d3.js 构建的等值线图。我将 data.csv 中的“Total_Score”属性映射到 JSON 文件中的“id”属性，并使用该分数为状态着色。我还在鼠标悬停时使用工具提示显示它。
不过，我也希望能够显示我的 CSV 文件中的其他属性。还有其他四个——“排名”、“第一”、“第二”和“第三”。我是否也必须为每一个创建地图？我从未绘制过多个地图，因此非常感谢任何指导或示例。
谢谢！
Here is a plunker for reference.
代码如下：
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>Worst Drivers</title>
<script src="http://d3js.org/d3.v3.min.js"></script>
<script src="d3.tip.js"></script>
<style type="text/css">
body{
background:#333;
font-family:Helvetica, Arial, sans-serif;
font-size:13px;
color:#fff;
padding:0px;
margin:0px;
}
h1{
margin:50px 0px 0px;
text-align:center;
font-size:30px;
font-weight:normal;
}
h2{
margin:0px;
padding:0px;
}
h4{
font-size:16px;
}
a{
text-decoration: none;
color: #2bbe8c;
}
#panel{
background:#fff;
color:#111;
width:27%;
height:100%;
float:right;
padding:3%;
}
#map{
width:66%;
float:left;
}
.sources{
font-size:12px;
}
.d3-tip{
background:#000;
opacity:.7;
padding:20px;
border-radius:3px;
}
.statename{
font-size:16px;
}
.mainno{
font-size:14px;
}
#legend{
position:absolute;
width:66%;
height:20px;
}
#legendinner{
margin:0 auto;
position:relative;
width:245px;
}
.legendleft{
width:50px;
float:left;
margin:0px;
}
.legendright{
width:50px;
float:right;
text-align:right;
margin:0px;
}
</style>
</head>
<body>
<div id="container">
<div id="map">
<div id="legend">
<div id="legendinner">
<svg width="250" height="15">
<rect x="0" y="0" width="50" height="10" fill="#041e47"></rect>
<rect x="50" y="0" width="50" height="10" fill="#063685"></rect>
<rect x="100" y="0" width="50" height="10" fill="#0449bb"></rect>
<rect x="150" y="0" width="50" height="10" fill="#055ced"></rect>
<rect x="200" y="0" width="50" height="10" fill="#5092ff"></rect>
</svg>
<p class="legendleft">Most</p>
<p class="legendright">Least</p>
</div>
</div>
</div>
</div>
<script type="text/javascript">
//Width and height
var w = Math.max(window.innerWidth) / 3 *2;
var h = Math.max(window.innerHeight) - 100;
//Create SVG element
map = d3.select("#map")
.append("svg")
.attr("id", "usstates")
.attr("width", w)
.attr("height", h);
var maph = document.getElementById('usstates').clientHeight;
d3.select("#legend")
.style("top", maph + 150 + "px");
//Define map projection
var p = d3.geo.albersUsa()
.translate([w/2, h/2])
.scale([1000]);
//Define path generator
var path = d3.geo.path()
.projection(p);
//load the geoJSON file for drawing the map
d3.json("states.json", function(error, states) {
var newDict = {}; //mapping for choropleth
var tip = d3.tip()
.attr('class', 'd3-tip')
.offset([40, 0])
.html(function(d,i) {
return "<span class='statename'>" + d.properties.name + "</span>" +
"<hr/>" +
"<span class='mainno'>Total Score: " + newDict[d.id] +
"<br/>rank: </span>" +
"<hr/>" +
"First: " +
"<br/>Second: " +
"<br/>Third: " ;
})
var mapstates = map.append("svg:g")
.attr("id", "states")
.style("fill", "#dedee0")
.style("stroke", "#aaa")
.style("stroke-width", .5);
mapstates.call(tip);
mapstates
.selectAll("path")
.data(states.features)
.enter().append("path")
.attr("d", path);
d3.csv("data.csv", function(error, data) {
data.forEach(function(d){
d.rank = + d.rank;
d.Total_Score = +d.Total_Score;
newDict[d.id] = +d.Total_Score;
});
var minValue = d3.min(data, function(d,data) { return d.Total_Score; });
var maxValue = d3.max(data, function(d,data) { return d.Total_Score; });
//Quantize scale for map
var color = d3.scale.quantize()
.domain([minValue, maxValue])
.range(["#041e47", "#063685", "#0449bb", "#055ced", "#5092ff"]);
mapstates
.selectAll("path")
.attr("d", path)
.on('mouseover', function(d) {
d3.select(this).style('fill-opacity', .75);
})
.on('mouseout', function(d){
d3.select(this).style("fill-opacity", 1);
})
.on('mouseover', tip.show)
.on('mouseout', tip.hide)
.attr("class", function(d){return newDict[d.id];})
.attr("fill", function(d) { return color(newDict[d.id]); })
.text("heyo");
mapstates.selectAll("text")
.data(states.features)
.enter()
.append("text")
.html(function(d){
return d.properties.abbr + ": " + newDict[d.id] ;
})
.attr("x", function(d){
return path.centroid(d)[0];
})
.attr("y", function(d){
return path.centroid(d)[1];
})
.attr("text-anchor","middle")
.attr('font-size',11)
.attr('font-weight', 'normal');
}); //close csv
}); // close json
</script>
</body>
</html>
data.csv 文件：
"State","id","first","second","third","TotalScore","rank"
"Alabama",1,15,24,29,113,18
"Alaska",2,22,51,50,195,49
"Arizona",4,14,28,41,109,14
"Arkansas",5,5,21,43,141,28
"California",6,42,26,39,146,33
"Colorado",8,33,4,24,101,11
"Connecticut",9,48,44,9,185,47
"Delaware",10,21,31,12,74,7
"District of Columbia",11,51,8,32,139,27
"Florida",12,19,29,30,131,24
"Georgia",13,28,11,46,147,34
"Hawaii",15,20,33,6,70,5
"Idaho",16,27,20,36,152,38
"Illinois",17,39,39,10,125,22
"Indiana",18,36,19,34,165,42
"Iowa",19,25,38,48,205,50
"Kansas",20,17,15,47,151,37
"Kentucky",21,6,2,49,131,24
"Louisiana",22,7,5,19,71,6
"Maine",23,26,10,17,103,12
"Maryland",24,41,50,18,141,28
"Massachusetts",25,50,37,8,156,39
"Michigan",26,37,42,37,179,45
"Minnesota",27,49,34,35,205,50
"Mississippi",28,8,12,26,111,17
"Missouri",29,24,18,13,91,10
"Montana",30,3,6,1,59,2
"Nebraska",31,29,16,7,141,28
"Nevada",32,30,14,14,79,8
"New Hampshire",33,43,46,33,190,48
"New Jersey",34,46,43,21,160,40
"New Mexico",35,11,27,42,109,14
"New York",36,40,36,20,143,31
"North Carolina",37,23,35,23,109,14
"North Dakota",38,4,3,2,66,4
"Ohio",39,35,22,15,135,26
"Oklahoma",40,9,1,31,87,9
"Oregon",41,34,49,45,184,46
"Pennsylvania",42,18,32,25,105,13
"Rhode Island",44,44,48,4,147,34
"South Carolina",45,1,30,3,54,1
"South Dakota",46,10,7,11,114,20
"Tennessee",47,13,25,27,143,31
"Texas",48,12,23,5,63,3
"Utah",49,45,9,51,169,44
"Vermont",50,31,13,40,113,18
"Virginia",51,38,40,38,163,41
"Washington",53,47,47,22,165,42
"West Virginia",54,2,45,44,116,21
"Wisconsin",55,32,17,16,130,23
"Wyoming",56,16,41,28,149,36
（我无法在此处粘贴 states.json 文件，因为它超出了帖子允许的正文大小，但您可以转到 Plunker。）
【问题讨论】：
标签： javascript json csv d3.js