谷歌地图上的 D3 图(带链接) [英] D3 graph (with links) over google maps
本文介绍了谷歌地图上的 D3 图(带链接)的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我正在尝试通过添加节点之间的链接(相关).
I am trying to modify this example by adding the links between the nodes (related).
<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="initial-scale=1.0, user-scalable=no"/>
<script type="text/javascript" src="http://maps.google.com/maps/api/js?sensor=true"></script>
<script type="text/javascript" src="http://mbostock.github.com/d3/d3.js?1.29.1"></script>
<style type="text/css">
html, body, #map {
width: 100%;
height: 100%;
margin: 0;
padding: 0;
}
.stations, .stations svg {
position: absolute;
}
.stations link {
position: absolute;
stroke: black;
stroke-width: 2px;
}
.stations svg {
width: 60px;
height: 20px;
padding-right: 100px;
font: 10px sans-serif;
}
.stations circle {
fill: brown;
stroke: black;
stroke-width: 1.5px;
}
</style>
</head>
<body>
<div id="map"></div>
<script type="text/javascript">
// Create the Google Map…
var map = new google.maps.Map(d3.select("#map").node(), {
zoom: 7,
center: new google.maps.LatLng(44.331216, 23.927536),
mapTypeId: google.maps.MapTypeId.TERRAIN
});
// Load the station data. When the data comes back, create an overlay.
d3.json("test-graph.json", function(json) {
var overlay = new google.maps.OverlayView();
// Add the container when the overlay is added to the map.
overlay.onAdd = function() {
var layer = d3.select(this.getPanes().overlayLayer).append("div")
.attr("class", "stations");
// Draw each marker as a separate SVG element.
// We could use a single SVG, but what size would it have?
overlay.draw = function() {
var projection = this.getProjection(),
padding = 10;
var markerLink = layer.selectAll("link")
.data(json.links)
.each(pathTransform) // update existing markers
.enter().append("line")
.each(pathTransform)
.attr("class", "link");
var marker = layer.selectAll("svg")
.data(json.nodes)
.each(transform) // update existing markers
.enter().append("svg:svg")
.each(transform)
.attr("class", "marker");
// Add a circle.
marker.append("svg:circle")
.attr("r", 5)
.attr("cx", padding)
.attr("cy", padding);
// Add a label.
marker.append("svg:text")
.attr("x", padding + 7)
.attr("y", padding)
.attr("dy", ".37em")
.text(function(d) { return d.id; });
function pathTransform(d) {
dsrc = new google.maps.LatLng(d.source.lat, d.source.lng);
dtrg = new google.maps.LatLng(d.target.lat, d.target.lng);
dsrc = projection.fromLatLngToDivPixel(dsrc);
dtrg = projection.fromLatLngToDivPixel(dtrg);
return d3.select(this)
.attr("x1", dsrc.x - padding)
.attr("y1", dsrc.y - padding)
.attr("x2", dtrg.x - padding)
.attr("y2", dtrg.y - padding);
}
function transform(d) {
d = new google.maps.LatLng(d.lat, d.lng);
d = projection.fromLatLngToDivPixel(d);
return d3.select(this)
.style("left", (d.x - padding) + "px")
.style("top", (d.y - padding) + "px");
}
};
};
// Bind our overlay to the map…
overlay.setMap(map);
});
</script>
</body>
</html>
和 JSON 文件:
{"directed": true, "graph": [], "nodes": [
{"lat": 44.391643516091975, "lng": 23.159677682342053, "id": "1:a"},
{"lat": 44.315988, "lng": 23.818359, "id": "a:a::"},
{"lat": 44.29844994776969, "lng": 24.402314492323608, "id": "b:b"},
{"lat": 44.351118152120485, "lng": 23.341791630955303, "id": "a:c"},
{"lat": 44.889424527442685, "lng": 23.960970697645276, "id": "e:d"},
{"lat": 43.46084400349923, "lng": 23.975774627524885, "id": "d:6104:1"},
{"lat": 44.64680010013528, "lng": 23.20292820976948, "id": "c:6104:2"},
{"lat": 44.40446080879215, "lng": 23.953536570796015, "id": "b:6104:3"},
{"lat": 44.18593375168617, "lng": 23.769879901486856, "id": "af:6104:4"},
{"lat": 44.09051846584001, "lng": 24.14130778735744, "id": "aaaa3bab:3d:7305"},
{"lat": 44.66376251969314, "lng": 23.77379490100736, "id": "aaaa3bab:3d:5507"},
{"lat": 44.6240449587762, "lng": 24.08347249542858, "id": "aaaa3bab:3d:6f06"},
{"lat": 45.00138334367271, "lng": 24.092331272179138, "id": "aaaa3bab:3d:1306"},
{"lat": 44.55033831045195, "lng": 24.312914121854526, "id": "aaaa3bab:3c:ef05"},
{"lat": 44.74421652327631, "lng": 24.728457702115804, "id": "aaaa3bab:3c:ea03"},
{"lat": 43.79401723931746, "lng": 23.77846416630604, "id": "aaaa3bab:3d:7200"},
{"lat": 43.67351687345779, "lng": 23.00140978137842, "id": "aaaa3bab:3d:5d07"},
{"lat": 43.87692500855015, "lng": 24.28543591328852, "id": "aaaa3bab:3d:550b"},
{"lat": 44.28189405244278, "lng": 23.972410391551893, "id": "aaaa3bab:3d:2706"},
{"lat": 43.94916218711252, "lng": 23.9733463072956, "id": "aaaa3bab:3d:2704"},
{"lat": 44.61479884874806, "lng": 24.27581898293906, "id": "aaaa3bab:3d:2608"},
{"lat": 44.92223011339065, "lng": 23.505887513934034, "id": "aaaa3bab:3d:6502"},
{"lat": 44.20117807597118, "lng": 23.70555450810448, "id": "aaaa3bab:3d:2603"},
{"lat": 43.547714841247966, "lng": 24.56985383484244, "id": "aaaa3bab:3d:2601"},
{"lat": 43.92116991202797, "lng": 22.82805535024416, "id": "aaaa3bab:3d:5803"},
{"lat": 44.56587414638437, "lng": 22.970799697228976, "id": "aaaa3bab:3d:7406"},
{"lat": 44.10230727065641, "lng": 23.701204095342597, "id": "aaaa3bab:3d:7407"},
{"lat": 45.25416535851712, "lng": 24.434312172789625, "id": "aaaa3bab:3d:7404"},
{"lat": 44.91647619491961, "lng": 23.678252259828515, "id": "aaaa3bab:3d:7405"},
{"lat": 45.03473433359779, "lng": 24.07596179597473, "id": "aaaa3bab:3d:7402"},
{"lat": 45.16855171992733, "lng": 23.435986773864467, "id": "aaaa3bab:3d:7403"},
{"lat": 44.553669079256146, "lng": 23.05123326220677, "id": "aaaa3bab:3d:7400"},
{"lat": 43.32871087231798, "lng": 23.325707869122013, "id": "aaaa3bab:3d:5308"},
{"lat": 43.40444516345915, "lng": 23.485798521785892, "id": "aaaa3bab:3c:f107"},
{"lat": 43.9435337313432, "lng": 22.968285824722354, "id": "aaaa3bab:3d:7401"},
{"lat": 44.74549949495889, "lng": 22.832034225254052, "id": "aaaa3bab:3d:7408"},
{"lat": 44.34901730307382, "lng": 24.33506529636527, "id": "aaaa3bab:3d:7409"},
{"lat": 43.53125851464172, "lng": 24.763229039168245, "id": "aaaa3bab:3d:6602"},
{"lat": 44.155575603194634, "lng": 23.250881840942217, "id": "aaaa3bab:3c:e300"}],
"links": [
{"source": 1, "target": 25},
{"source": 1, "target": 26},
{"source": 1, "target": 27},
{"source": 1, "target": 28},
{"source": 1, "target": 29},
{"source": 1, "target": 30},
{"source": 1, "target": 31},
{"source": 1, "target": 34},
{"source": 1, "target": 35},
{"source": 1, "target": 36},
{"source": 3, "target": 5},
{"source": 3, "target": 6},
{"source": 4, "target": 15},
{"source": 4, "target": 9},
{"source": 5, "target": 19},
{"source": 5, "target": 23},
{"source": 6, "target": 18},
{"source": 6, "target": 20},
{"source": 7, "target": 22},
{"source": 8, "target": 37},
{"source": 8, "target": 3},
{"source": 10, "target": 11},
{"source": 17, "target": 21}, {"source": 18, "target": 13}, {"source": 18, "target": 14}, {"source": 19, "target": 33}, {"source": 19, "target": 38}, {"source": 23, "target": 2}, {"source": 25, "target": 10}, {"source": 28, "target": 4}, {"source": 28, "target": 17}, {"source": 29, "target": 32}, {"source": 32, "target": 25}, {"source": 34, "target": 24}, {"source": 35, "target": 8}, {"source": 35, "target": 16}, {"source": 37, "target": 7}, {"source": 37, "target": 12}], "multigraph": false}
现在我可以通过数组访问坐标.我仍然遇到一个问题:显示链接(SVG).
Now I can access the coordinates thanks to an array. I'm still having one problem: showing the links (SVGs).
<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="initial-scale=1.0, user-scalable=no"/>
<script type="text/javascript" src="http://maps.google.com/maps/api/js?sensor=true"></script>
<script type="text/javascript" src="http://mbostock.github.com/d3/d3.js?1.29.1"></script>
<style type="text/css">
html, body, #map {
width: 100%;
height: 100%;
margin: 0;
padding: 0;
}
.stations, .stations svg {
position: absolute;
}
.stations line {
position: absolute;
stroke: black;
stroke-width: 2px;
}
.stations svg {
width: 60px;
height: 20px;
padding-right: 100px;
font: 10px sans-serif;
}
.stations circle {
fill: brown;
stroke: black;
stroke-width: 1.5px;
}
</style>
</head>
<body>
<div id="map"></div>
<script type="text/javascript">
// Create the Google Map…
var map = new google.maps.Map(d3.select("#map").node(), {
zoom: 7,
center: new google.maps.LatLng(44.331216, 23.927536),
mapTypeId: google.maps.MapTypeId.TERRAIN
});
// Load the station data. When the data comes back, create an overlay.
d3.json("test-graph.json", function(json) {
var overlay = new google.maps.OverlayView();
// Add the container when the overlay is added to the map.
overlay.onAdd = function() {
var layer = d3.select(this.getPanes().overlayLayer).append("div")
.attr("class", "stations");
// Draw each marker as a separate SVG element.
// We could use a single SVG, but what size would it have?
overlay.draw = function() {
var projection = this.getProjection(),
padding = 10;
var node_coord = {};
var marker = layer.selectAll("svg")
.data(json.nodes)
.each(transform) // update existing markers
.enter().append("svg:svg")
.each(transform)
.attr("class", "marker");
marker.append("svg:circle")
.attr("r", 5)
.attr("cx", padding)
.attr("cy", padding);
// Add a label.
marker.append("svg:text")
.attr("x", padding + 7)
.attr("y", padding)
.attr("dy", ".37em")
.text(function(d) { return d.id; });
var markerLink = layer.selectAll("link")
.data(json.links)
.each(pathTransform) // update existing markers
.enter().append("svg:svg")
.each(pathTransform)
.attr("class", "line")
.append("svg:line")
.style("stroke-width", 5);
// Add a circle.
function pathTransform(d) {
console.log(node_coord[d.source-1 + "," + 1]);
dsrc = new google.maps.LatLng(node_coord[d.source-1 + "," + 1], node_coord[d.source-1 + "," + 0]);
dtrg = new google.maps.LatLng(node_coord[d.target-1 + "," + 1], node_coord[d.target-1 + "," + 0]);
console.log(dsrc);
console.log(dtrg);
console.log("source" + d.source);
console.log("target" + d.target);
dsrc = projection.fromLatLngToDivPixel(dsrc);
dtrg = projection.fromLatLngToDivPixel(dtrg);
console.log(dsrc);
console.log(dtrg);
return d3.select(this)
.attr("x1", dsrc.x - padding)
.attr("y1", dsrc.y - padding)
.attr("x2", dtrg.x - padding)
.attr("y2", dtrg.y - padding);
}
function transform(d,i) {
node_coord[i + "," + 0] = d.lng;
node_coord[i + "," + 1] = d.lat;
d = new google.maps.LatLng(d.lat, d.lng);
d = projection.fromLatLngToDivPixel(d);
return d3.select(this)
.style("left", (d.x - padding) + "px")
.style("top", (d.y - padding) + "px");
}
};
};
// Bind our overlay to the map…
overlay.setMap(map);
});
</script>
</body>
</html>
推荐答案
总算搞定了.
我必须包含 jQuery 才能在重绘时删除旧的 svg:line 元素.
I had to include jQuery for removing the old svg:line elements on redraw.
<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="initial-scale=1.0, user-scalable=no"/>
<script type="text/javascript" src="http://maps.google.com/maps/api/js?sensor=true"></script>
<script type="text/javascript" src="http://mbostock.github.com/d3/d3.js?1.29.1"></script>
<script type="text/javascript" src="http://code.jquery.com/jquery-1.8.1.min.js"></script>
添加了一个 .links 类:
Added a .links class:
<style type="text/css">
html, body, #map {
width: 100%;
height: 100%;
margin: 0;
padding: 0;
}
.stations, .stations svg {
position: absolute;
}
.links {
//width: 100%;
//height: 100%;
position: absolute;
}
.stations svg {
width: 60px;
height: 20px;
padding-right: 100px;
font: 10px sans-serif;
}
.stations circle {
fill: brown;
stroke: black;
stroke-width: 1.5px;
}
</style>
</head>
创建 Google 地图...
Create the Google Map…
<body>
<div id="map"></div>
<script type="text/javascript">
var map = new google.maps.Map(d3.select("#map").node(), {
zoom: 7,
center: new google.maps.LatLng(44.331216, 23.927536),
mapTypeId: google.maps.MapTypeId.TERRAIN
});
// Load the station data. When the data comes back, create an overlay.
d3.json("test-graph.json", function(json) {
var overlay = new google.maps.OverlayView();
// Add the container when the overlay is added to the map.
overlay.onAdd = function() {
var layer = d3.select(this.getPanes().overlayLayer)
.append("div")
.attr("height", "100%")
.attr("width", "100%")
.attr("class", "stations");
将每个标记绘制为一个单独的 SVG 元素.我们可以使用单个 SVG，但它的大小是多少?
Draw each marker as a separate SVG element. We could use a single SVG, but what size would it have?
overlay.draw = function() {
var radius = 5;
var projection = this.getProjection(),
padding = 10;
var node_coord = {};
var marker = layer.selectAll("svg")
.data(json.nodes)
.each(transform) // update existing markers
.enter().append("svg:svg")
.each(transform)
.attr("class", "marker");
marker.append("svg:circle")
.attr("r", radius)
.attr("cx", padding)
.attr("cy", padding);
// Add a label.
marker.append("svg:text")
.attr("x", padding + 7)
.attr("y", padding)
.attr("dy", ".37em")
.text(function(d) { return d.id; });
var markerLink = layer.selectAll(".links")
.data(json.links)
.each(pathTransform) // update existing markers
.enter().append("svg:svg")
.attr("class", "links")
.each(pathTransform);
链接转换功能(感谢 他的问题).
The link transform function (thanks to his question).
function pathTransform(d) {
var t, b, l, r, w, h, currentSvg;
$(this).empty(); // get rid of the old lines (cannot use d3 .remove() because i cannot use selectors after ... )
dsrc = new google.maps.LatLng(node_coord[d.source-1 + "," + 1], node_coord[d.source-1 + "," + 0]);
dtrg = new google.maps.LatLng(node_coord[d.target-1 + "," + 1], node_coord[d.target-1 + "," + 0]);
d1 = projection.fromLatLngToDivPixel(dsrc);
d2 = projection.fromLatLngToDivPixel(dtrg);
if ( d1.y < d2.y ) {
t = d1.y;
b = d2.y;
} else {
t = d2.y;
b = d1.y;
}
if ( d1.x < d2.x ) {
l = d1.x;
r = d2.x;
} else {
l = d2.x;
r = d1.x;
}
currentSvg = d3.select(this)
.style("left", (l + radius) + "px")
.style("top", (t + radius) + "px")
.style("width", (r - l - radius) + "px")
.style("height", (b - t - radius) + "px");
// drawing the diagonal lines inside the svg elements. We could use 2 cases instead of for but maybe you will need to orient your graph (so you can use some arrows)
if (( d1.y < d2.y) && ( d1.x < d2.x)) {
currentSvg.append("svg:line")
.style("stroke-width", 1)
.style("stroke", "black")
.attr("y1", 0)
.attr("x1", 0)
.attr("x2", r-l)
.attr("y2", b-t);
} else if ((d1.x > d2.x) && (d1.y > d2.y)){
currentSvg.append("svg:line")
.style("stroke-width", 1)
.style("stroke", "black")
.attr("y1", 0)
.attr("x1", 0)
.attr("x2", r-l)
.attr("y2", b-t);
} else if (( d1.y < d2.y) && ( d1.x > d2.x)){
currentSvg.append("svg:line")
.style("stroke-width", 1)
.style("stroke", "black")
.attr("y1", 0)
.attr("x2", 0)
.attr("x1", r-l)
.attr("y2", b-t);
} else if ((d1.x < d2.x) && (d1.y > d2.y)){
currentSvg.append("svg:line")
.style("stroke-width", 1)
.style("stroke", "black")
.attr("y1", 0)
.attr("x2", 0)
.attr("x1", r-l)
.attr("y2", b-t);
} else {
console.log("something is wrong!!!");
}
return currentSvg;
}
在变换函数中添加了一个数组来获取节点坐标.
Added an array in the transform function to get the node coordinates.
function transform(d,i) {
console.log(i);
node_coord[i + "," + 0] = d.lng;
node_coord[i + "," + 1] = d.lat;
d = new google.maps.LatLng(d.lat, d.lng);
d = projection.fromLatLngToDivPixel(d);
return d3.select(this)
.style("left", (d.x - padding) + "px")
.style("top", (d.y - padding) + "px");
}
layer.append("div")
.attr("class", "stations.line");
};
};
// Bind our overlay to the map…
overlay.setMap(map);
});
</script>
这篇关于谷歌地图上的 D3 图(带链接)的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
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