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congestion_propagation_pattern_heapmap.jsp
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congestion_propagation_pattern_heapmap.jsp
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<%--
Created by IntelliJ IDEA.
User: GEORGE-pc
Date: 2020/2/29
Time: 15:07
To change this template use File | Settings | File Templates.
--%>
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>
<!DOCTYPE html>
<html lang="en">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<meta name="viewport" content="initial-scale=1.0, user-scalable=no" />
<script type="text/javascript" src="http://api.map.baidu.com/api?v=2.0&ak=SGZAQcGREz9ugRxt9eWnn7nHynec9lRb"></script>
<script type="text/javascript" src="http://api.map.baidu.com/library/Heatmap/2.0/src/Heatmap_min.js"></script>
<script type="text/javascript" src="build/jquery-1.10.2.min.js"></script>
<title>拥堵传播模式热力图展示</title>
<style type="text/css">
ul,li{list-style: none;margin:0;padding:0;float:left;}
html{height:100%}
body{height:100%;margin:0px;padding:0px;font-family:"微软雅黑";}
#container{height:95%;width:100%;}
#r-result{width:100%;}
</style>
</head>
<body>
<div id="container" ></div>
<div id="r-result">
<div id="interval" style="float: left;margin-right: 10px;"></div>
<div id="progress" style="float: left;margin-right: 10px;"></div>
<input type="button" onclick="closeHeatmap();" value="关闭拥塞传播的热力图图示"/>
<input type="button" onclick="display_next_interval_heatmaps();" value="显示下一时间片的拥塞传播的热力图示集合"/>
<input type="button" onclick="display_next_heatmap();" value="显示下一拥塞传播的热力图示"/>
<input type="button" onclick="display_last_interval_heatmaps();" value="显示上一时间片的拥塞传播情热力图示集合"/>
<input type="button" onclick="display_last_heatmap();" value="显示上一拥塞传播情热力图示"/>
<input type="button" onclick="next_day();" value="转到下一天"/>
</div>
</body>
</html>
<script type="text/javascript">
// 这个文件需借助动态web应用来使用，因为使用了ajax获取本地服务器（本地）数据
cur_part_no = 4;
url_cpp = "data/sfba/part"+cur_part_no+"/grid32/visual_data/congestion_propagation_pattern_data/";
url_tg = "data/sfba/part"+cur_part_no+"/grid32/visual_data/transition_grid_data/";
time_interval_large = ["0600-1000", "1700-2100"];
function get_next_time_interval_congestion_propagation_data(interval_step) {
cpp_interval_index = (cpp_interval_index + interval_step);
if (cpp_interval_index <= -1) {
cpp_interval_index = time_interval_large.length - 1;
} else {
cpp_interval_index = cpp_interval_index % time_interval_large.length;
}
var interval_points = [];
var load_data = function () {
$.ajax({
url: "<%=basePath%>"+url_cpp+"cpp_"+time_interval_large[cpp_interval_index]+".json",
data: "",
async: false,
success: function (data) {
interval_points = data;
},
error: function(info) {
console.log("Fail to load congestion propagation data " + time_interval_large[cpp_interval_index])
},
dataType: "json"
});
};
load_data();
return interval_points;
}
function get_next_time_interval_transition_congestion_grid_data(interval_step) {
tg_interval_index = (tg_interval_index + interval_step);
if (tg_interval_index <= -1) {
tg_interval_index = time_interval_large.length - 1;
} else {
tg_interval_index = tg_interval_index % time_interval_large.length;
}
var interval_points = [];
var load_data = function () {
$.ajax({
url: "<%=basePath%>"+url_tg+"tg_"+time_interval_large[tg_interval_index]+".json",
data: "",
async: false,
success: function (data) {
interval_points = data;
},
error: function(info) {
console.log("Fail to load congestion propagation data " + time_interval_large[tg_interval_index])
},
dataType: "json"
});
};
load_data();
return interval_points;
}
var map = new BMap.Map("container");
// var point = new BMap.Point(-122.45, 37.755);
var point = new BMap.Point(-122.420586,37.78767);
map.centerAndZoom(point, 14);
map.enableScrollWheelZoom(true);
map.addControl(new BMap.ScaleControl());
if(!isSupportCanvas()){
alert('热力图目前只支持有canvas支持的浏览器,您所使用的浏览器不能使用热力图功能~')
}
//详细的参数,可以查看heatmap.js的文档 https://github.com/pa7/heatmap.js/blob/master/README.md
//参数说明如下:
/* visible 热力图是否显示,默认为true
* opacity 热力的透明度,1-100
* radius 势力图的每个点的半径大小
* gradient {JSON} 热力图的渐变区间 . gradient如下所示
* {
.2:'rgb(0, 255, 255)',
.5:'rgb(0, 110, 255)',
.8:'rgb(100, 0, 255)'
}
其中 key 表示插值的位置, 0~1.
value 为颜色值.
*/
var cpp_interval_index = -1;
var tg_interval_index = -1;
var cpp_index = -1;
var tg_index = -1;
var interval_points;
var tg_interval_points;
var points;
var tg_points;
var options = {
"radius":25
};
heatmapOverlay = new BMapLib.HeatmapOverlay(options); // 14->25, 15->50, 16->90
map.addOverlay(heatmapOverlay);
zoom_icon_dict = {18:["image/position-2-1.png", 64], 17:["image/position-2-1.png", 64], 16:["image/position-2-2.png", 48],
15:["image/position-2.png", 32], 14:["image/position-2-3.png", 16], 13:["image/position-2-3.png", 16]};
// 放大到 14 级
var icon = new BMap.Icon(
'image/position-2-3.png',
new BMap.Size(16, 16)
);
// 放大到 15 级
// var icon = new BMap.Icon(
// 'image/position-2.png',
// new BMap.Size(32, 32)
// );
// 放大到 16 级
// var icon = new BMap.Icon(
// 'image/position-2-2.png',
// new BMap.Size(48, 48)
// );
// 保证网格大小与地图标尺大小一致
zoom_size_dict = {13:12, 14:25, 15:50, 16:90, 17:200};
map.addEventListener("zoomend", function(evt){
options.radius = zoom_size_dict[this.getZoom()];
console.log("current zoom is " + this.getZoom() + ", and current radius is " + options.radius);
if ((this.getZoom() < 13 || this.getZoom() > 17) || points == "undefined" || cpp_index == -1) {
return
}
if (typeof heatmapOverlay != "undefined") {
heatmapOverlay.toggle();
heatmapOverlay = new BMapLib.HeatmapOverlay({"radius":zoom_size_dict[this.getZoom()]}); // 14->25, 15->50, 16->90
map.addOverlay(heatmapOverlay);
openHeatmap();
}
icon_png = zoom_icon_dict[this.getZoom()][0];
icon_size = zoom_icon_dict[this.getZoom()][1];
icon = new BMap.Icon(
icon_png,
new BMap.Size(icon_size, icon_size)
);
showMarker();
});
zoom_offset_dict = {13:0.0014, 14:0.0014, 15:0.0012, 16:0.0010, 17:0.0008};
var marker_memo = new Array();
function showMarker() {
while (marker_memo.length > 0) {
marker = marker_memo.pop();
map.removeOverlay(marker)
}
for (var i = 0; i < tg_points.length; i++) {
mk = tg_points[i];
// markerPosOffset = 0.0012 // 放大到 15 级
// markerPosOffset = 0.0010; // 放大到 16 级
markerPosOffset = zoom_offset_dict[map.getZoom()];
var mostDensityPoint = new BMap.Point(mk['location'][0],mk['location'][1]+markerPosOffset);
var marker = new BMap.Marker(mostDensityPoint, {icon: icon});
map.addOverlay(marker);
marker_memo.push(marker)
}
}
function openHeatmap(){
heatmapOverlay.setDataSet({data:points,max:10});
heatmapOverlay.show();
showMarker()
}
function display_next_interval_heatmaps() {
interval_points = get_next_time_interval_congestion_propagation_data(1);
tg_interval_points = get_next_time_interval_transition_congestion_grid_data(1);
console.log(interval_points.length);
console.log(tg_interval_points.length);
$("#interval").text("当前时间片为：" + time_interval_large[tg_interval_index]);
tg_index =-1;
cpp_index = -1;
display_next_heatmap();
}
function display_last_interval_heatmaps() {
interval_points = get_next_time_interval_congestion_propagation_data(-1);
tg_interval_points = get_next_time_interval_transition_congestion_grid_data(-1);
console.log(interval_points.length);
console.log(tg_interval_points.length);
$("#interval").text("当前时间片为：" + time_interval_large[tg_interval_index]);
display_last_heatmap();
}
function patch() {
console.log("points length is " + points.length);
for (var i = 0; i < tg_points.length; i++) {
tg_p = tg_points[i];
exists = false;
for (var j = 0; j < points.length; j++) {
if (tg_p["location"][0] == points[j]["lng"] && tg_p["location"][1] == points[j]["lat"]) {
exists = true;
}
}
if (!exists) {
points.push({"count":20, "lat":tg_p["location"][1], "lng":tg_p["location"][0]});
}
}
console.log("points length is " + points.length);
}
function display_next_heatmap() {
tg_index = (tg_index + 1) % tg_interval_points.length;
tg_points = tg_interval_points[tg_index];
cpp_index = (cpp_index + 1) % interval_points.length;
points = interval_points[cpp_index];
patch();
console.log(tg_points.length);
console.log(points.length);
openHeatmap();
$("#progress").text("day" + (cur_part_no+24)+" "+ tg_index+"/"+(tg_interval_points.length-1));
}
function display_last_heatmap() {
tg_index = (tg_index -1);
if (tg_index <= -1) {
tg_index = tg_interval_points.length - 1;
}
tg_points = tg_interval_points[tg_index];
cpp_index = (cpp_index -1);
if (cpp_index <= -1) {
cpp_index = interval_points.length - 1;
}
points = interval_points[cpp_index];
patch();
console.log(tg_points.length);
console.log(points.length);
openHeatmap();
$("#progress").text("day" + (cur_part_no+24)+" "+ tg_index+"/"+(tg_interval_points.length-1));
}
function next_day() {
cur_part_no = (cur_part_no + 1) % 8;
url_cpp = "data/sfba/part"+cur_part_no+"/grid32/visual_data/congestion_propagation_pattern_data/";
url_tg = "data/sfba/part"+cur_part_no+"/grid32/visual_data/transition_grid_data/";
display_next_interval_heatmaps()
}
function closeHeatmap(){
heatmapOverlay.hide();
}
closeHeatmap();
function setGradient(){
/*:
{
0:'rgb(102, 255, 0)',
.5:'rgb(255, 170, 0)',
1:'rgb(255, 0, 0)'
}*/
var gradient = {};
var colors = document.querySelectorAll("input[type='color']");
colors = [].slice.call(colors,0);
colors.forEach(function(ele){
gradient[ele.getAttribute("data-key")] = ele.value;
});
heatmapOverlay.setOptions({"gradient":gradient});
}
function isSupportCanvas(){
var elem = document.createElement('canvas');
return !!(elem.getContext && elem.getContext('2d'));
}
</script>