Javascript 从多段线坐标阵列创建立面轮廓
我使用坐标数组创建了一条多段线,代码改编自 尽管第一种(可能是最差的)建造管线的方法只是一个巨大的lat/lng点列表。我仍然在学习编程技巧,很抱歉。我是地理学家,不是程序员 我想从该线获取高程,并创建高程纵断面图。 我是JS新手,不知道如何调试不起作用的东西。我似乎无法用多段线的坐标填充路径数组 其当前设置为将BikeCourse坐标推送到一个新数组,然后该数组将用作路径。我试着用bikeCourseCordinations数组作为“路径”,但也没用 在线(但非工作版本)此处:Javascript 从多段线坐标阵列创建立面轮廓,javascript,google-maps-api-3,elevation,google-polyline,Javascript,Google Maps Api 3,Elevation,Google Polyline,我使用坐标数组创建了一条多段线,代码改编自 尽管第一种(可能是最差的)建造管线的方法只是一个巨大的lat/lng点列表。我仍然在学习编程技巧,很抱歉。我是地理学家,不是程序员 我想从该线获取高程,并创建高程纵断面图。 我是JS新手,不知道如何调试不起作用的东西。我似乎无法用多段线的坐标填充路径数组 其当前设置为将BikeCourse坐标推送到一个新数组,然后该数组将用作路径。我试着用bikeCourseCordinations数组作为“路径”,但也没用 在线(但非工作版本)此处: 函数dr
函数drawPath(){
//在立面图分区中创建新图表。
chart=新的google.visualization.ColumnChart(document.getElementById('elevation_chart'));
var路径=新数组;
推送路径(bikecourse坐标);
//使用此数组创建PathElevationRequest对象。
var路径请求={
“路径”:路径,
“样本”:256
}
//启动路径请求。
电梯.GetElevationLongPath(路径请求,绘图高程);
}
//获取ElevationResult对象数组,在地图上绘制路径
//并在可视化API柱形图上绘制高程剖面。
功能图高程(结果、状态){
if(status==google.maps.ElevationStatus.OK){
高程=结果;
//从返回的结果中提取高程样本
//并将它们存储在一组板条中。
var提升路径=[];
对于(var i=0;i
我找不到问题,但以下是一些可能有帮助的观察结果:
我只是用bikeCourseCordinates数组作为“路径”进行了尝试。
根据Maps API,pathRequest
应为:
var pathRequest = {
'path': bikeCourseCoordinates,
'samples': 256
}
此外,我认为以下最初部分,即:
var whitney = new google.maps.LatLng(36.578581, -118.291994);
...
...
var panamintsprings = new google.maps.LatLng(36.339722, -117.467778);
var badwater = new google.maps.LatLng(36.23998, -116.83171);
var bikeCourseCoordinates = [
new google.maps.LatLng(47.67609435030702, -116.7896032333374),
它直接位于第一个内联
标记中,应仅在加载地图库后调用。我会把它全部放在另一个函数中,比如说myInit
,然后从当前名为initialize
的函数中调用myInit
上面的原因是,尽管您将脚本标记包括在maps api
maps.googleapis.com/maps/api/js?sensor=false
中,但浏览器将继续执行包含whitney=new google.maps.Lat
的下一个脚本块,因为maps.googleapis.com是一个外部脚本,我认为这些脚本是外部脚本脚本是异步加载的。您是否试图在该页面上复制第三个示例
如果是,我已经做了,但没有图形覆盖效果
这是我的密码
这在你脑子里
script type="text/javascript" src="http://maps.google.com/maps/api/js?sensor=true"
script type="text/javascript" src="https://www.google.com/jsapi"
script src="https://www.google.com/uds/?file=visualization&v=1&packages=columnchart" type="text/javascript"
这个在页脚上,就在body标签前面
var elevator;
var map;
var chart;
var infowindow = new google.maps.InfoWindow();
var polyline;
var mapCenter = new google.maps.LatLng(-21.745585792425,165.91141052497);
// Load the Visualization API and the columnchart package.
google.load("visualization", "1", {packages: ["columnchart"]});
function initialize() {
var mapOptions = {
center: mapCenter,
zoom: 13,
mapTypeId: 'terrain'
};
map = new google.maps.Map(document.getElementById("map"), mapOptions);
// Create an ElevationService.
elevator = new google.maps.ElevationService();
// Draw the path, using the Visualization API and the Elevation service.
drawPath();
}
function drawPath() {
// Create a new chart in the elevation_chart DIV.
chart = new google.visualization.ColumnChart(document.getElementById('elevation-chart'));
var path = bikeCourseCoordinates;
// Create a PathElevationRequest object using this array.
// Ask for 256 samples along that path.
var pathRequest = {
'path': path,
'samples': 256
}
// Initiate the path request.
elevator.getElevationAlongPath(pathRequest, plotElevation);
}
function plotElevation(results, status) {
if (status == google.maps.ElevationStatus.OK) {
elevations = results;
// Extract the elevation samples from the returned results
// and store them in an array of LatLngs.
var elevationPath = [];
for (var i = 0; i < results.length; i++) {
elevationPath.push(elevations[i].location);
}
// Display a polyline of the elevation path.
var pathOptions = {
path: elevationPath,
strokeColor: '#0000CC',
opacity: 0.9,
map: map
}
polyline = new google.maps.Polyline(pathOptions);
// Extract the data from which to populate the chart.
// Because the samples are equidistant, the 'Sample'
// column here does double duty as distance along the
// X axis.
var data = new google.visualization.DataTable();
data.addColumn('string', 'Sample');
data.addColumn('number', 'Elevation');
for (var i = 0; i < results.length; i++) {
data.addRow(['', elevations[i].elevation]);
}
// Draw the chart using the data within its DIV.
document.getElementById('elevation-chart').style.display = 'block';
chart.draw(data, {
width: 960,
height: 300,
legend: 'none',
titleY: 'Elevation (m)'
});
}
}
initialize();
var电梯;
var映射;
var图;
var infowindow=new google.maps.infowindow();
var多段线;
var mapCenter=new google.maps.LatLng(-21.745585792425165.91141052497);
//加载可视化API和columnchart包。
load(“可视化”、“1”、{packages:[“columnchart”]});
函数初始化(){
变量映射选项={
中心:地图中心,
缩放:13,
mapTypeId:'地形'
};
map=new google.maps.map(document.getElementById(“map”)、mapOptions);
//创建一个提升服务。
电梯=新的google.maps.ElevationService();
//使用可视化API和立面服务绘制路径。
绘图路径();
}
函数drawPath(){
//在立面图分区中创建新图表。
chart=新的google.visualization.ColumnChart(document.getElementById('elevation-chart'));
var path=BIKECOURSE坐标;
//使用此数组创建PathElevationRequest对象。
//沿着该路径要求256个样本。
var路径请求={
“路径”:路径,
“样本”:256
}
//启动路径请求。
电梯.GetElevationLongPath(路径请求,绘图高程);
}
功能图高程(结果、状态){
if(status==google.maps.ElevationStatus.OK){
高程=结果;
//从返回的结果中提取高程样本
//并将它们存储在一组板条中。
var提升路径=[];
对于(var i=0;ivar elevator;
var map;
var chart;
var infowindow = new google.maps.InfoWindow();
var polyline;
var mapCenter = new google.maps.LatLng(-21.745585792425,165.91141052497);
// Load the Visualization API and the columnchart package.
google.load("visualization", "1", {packages: ["columnchart"]});
function initialize() {
var mapOptions = {
center: mapCenter,
zoom: 13,
mapTypeId: 'terrain'
};
map = new google.maps.Map(document.getElementById("map"), mapOptions);
// Create an ElevationService.
elevator = new google.maps.ElevationService();
// Draw the path, using the Visualization API and the Elevation service.
drawPath();
}
function drawPath() {
// Create a new chart in the elevation_chart DIV.
chart = new google.visualization.ColumnChart(document.getElementById('elevation-chart'));
var path = bikeCourseCoordinates;
// Create a PathElevationRequest object using this array.
// Ask for 256 samples along that path.
var pathRequest = {
'path': path,
'samples': 256
}
// Initiate the path request.
elevator.getElevationAlongPath(pathRequest, plotElevation);
}
function plotElevation(results, status) {
if (status == google.maps.ElevationStatus.OK) {
elevations = results;
// Extract the elevation samples from the returned results
// and store them in an array of LatLngs.
var elevationPath = [];
for (var i = 0; i < results.length; i++) {
elevationPath.push(elevations[i].location);
}
// Display a polyline of the elevation path.
var pathOptions = {
path: elevationPath,
strokeColor: '#0000CC',
opacity: 0.9,
map: map
}
polyline = new google.maps.Polyline(pathOptions);
// Extract the data from which to populate the chart.
// Because the samples are equidistant, the 'Sample'
// column here does double duty as distance along the
// X axis.
var data = new google.visualization.DataTable();
data.addColumn('string', 'Sample');
data.addColumn('number', 'Elevation');
for (var i = 0; i < results.length; i++) {
data.addRow(['', elevations[i].elevation]);
}
// Draw the chart using the data within its DIV.
document.getElementById('elevation-chart').style.display = 'block';
chart.draw(data, {
width: 960,
height: 300,
legend: 'none',
titleY: 'Elevation (m)'
});
}
}
initialize();