我正在调整可扩展和可点击的地图，找到http://bl.ocks.org/mbostock/2206340来绘制一些点并做一些其他的事情。现在，我试图让它在缩放和点击动作中，绘制的点也移动/尊重缩放。我不确定这里的代码是什么错误，因为我似乎在缩放+点击中调用red.circle和blue.circle对象 - 任何人都可以识别问题吗？谢谢！ data.csv的格式如下：
lon_0,lat_0,lon_1,lat_1
-122.1430195,37.4418834,-122.415278,37.778643
-122.1430195,37.4418834,-122.40815,37.785034
-122.4194155,37.7749295,-122.4330827,37.7851673
-122.4194155,37.7749295,-122.4330827,37.7851673
-118.4911912,34.0194543,-118.3672828,33.9164666
-121.8374777,39.7284944,-121.8498415,39.7241178
-115.172816,36.114646,-115.078011,36.1586877
这是d3.js脚本。
.background {
fill: none;
pointer-events: all;
}
#states path {
fill: #aaa;
stroke: #fff;
stroke-width: 1.5px;
}
#states path:hover {
stroke: white;
}
</style>
<body>
<script>
var width = 1920/2,
height = 1000/2;
var projection = d3.geo.albersUsa()
.scale(width)
.translate([width / 2, height / 2]);
var path = d3.geo.path()
.projection(projection);
var zoom = d3.behavior.zoom()
.translate(projection.translate())
.scale(projection.scale())
.scaleExtent([height, 50 * height])
.on("zoom", zoom);
var svg = d3.select("body").append("svg")
.attr("width", width)
.attr("height", height)
.attr("style", "stroke:black; stroke-width:2px");
var states = svg.append("g")
.attr("id", "states")
.call(zoom);
var dataset = [];
states.append("rect")
.attr("class", "background")
.attr("width", width)
.attr("height", height);
d3.json("us-states.json", function(json) {
states.selectAll("path")
.data(json.features)
.enter().append("path")
.attr("d", path)
.on("click", click);
d3.csv("data.csv", function(data) {
states.selectAll(".blue.circle")
.data(data)
.enter()
.append("circle")
.attr("cx", function(d) {
return projection([d["lon_0"], d["lat_0"] ])[0];
})
.attr("cy", function(d) {
return projection([d["lon_0"],d["lat_0"] ])[1];
})
.attr("r", 5)
.attr("class", "blue circle")
.style("fill", "blue");
states.selectAll(".red.circle")
.data(data)
.enter()
.append("circle")
.attr("cx", function(d) {
return projection([+d["lon_1"], +d["lat_1"] ])[0];
})
.attr("cy", function(d) {
return projection([+d["lon_1"],+d["lat_1"] ])[1];
})
.attr("r", 5)
.attr("class", "red circle")
.style("fill", "red");
});
});
function click(d) {
var centroid = path.centroid(d),
translate = projection.translate();
projection.translate([
translate[0] - centroid[0] + width / 2,
translate[1] - centroid[1] + height / 2
]);
zoom.translate(projection.translate());
states.selectAll("path").transition()
.duration(1000)
.attr("d", path);
states.selectAll("red.circle").transition()
.duration(1000)
.attr("d", circle);
states.selectAll("blue.circle").transition()
.duration(1000)
.attr("d", circle);
}
function zoom() {
projection.translate(d3.event.translate).scale(d3.event.scale);
states.selectAll("path").attr("d", path);
states.selectAll("red.circle").attr("d", path);
states.selectAll("blue.circle").attr("d",path);
}
</script>
当你加载地图时，你正在设置圆圈的坐标，所以当你点击缩放功能时，你的圆圈会被显示但没有使用相同的坐标 - 我认为 - 如果你可以创建一个http://bl.ocks.org看到这个。
也许这可以帮助qazxsw poi只有英国，美国和阿富汗的作品，但我基本上重新投影二级地图以适应新的缩放级别。