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javascript - Google map 进行调整以包含用户和地址

转载 作者:行者123 更新时间:2023-12-02 22:29:58 25 4
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我正在尝试对代码进行一些调整,但开发人员无法再提供帮助。我对 GMaps api 和代码一无所知,但我仍在试图弄清楚。

问题是我们在 map 上有用户,我们希望 map 自动放大以包含所有用户。我们能够做到这一点。然而,我们有一个应该包含在其中的主要地址......所以我们想要做的是自动缩放到足够近以包括最远的点,无论它是用户还是主要地址。要进行演示,请查看下面的 URL:

http://app2.wehaveeyes.com/reports/maps/maps2.cfm

如果缩小,您会看到主要地址位于大约 5 英里之外。 Here is what it shows now...

但这就是我们希望它自动缩放以包含主地址 Map with all users and address

下面是代码:

<!DOCTYPE html>
<html>
<head>
<title></title>
<meta name="viewport" content="width=device-width, initial-scale=1.0, user-scalable=no">
<meta charset="utf-8">
<META HTTP-EQUIV="refresh" CONTENT="10">

<style>
/* Set the size of the div element that contains the map */
#map {
height: 100%; /* The height is the height of the web page */
width: 100%; /* The width is the width of the web page */
}

html, body {
height: 100%;
margin: 0;
padding: 0;
}

.user_info {
background-color: ##0000;
font-weight: bold;
color: #fff;
}
</style>

<script src="https://maps.googleapis.com/maps/api/js?key=MY_API_KEY">
</script>
<script src="https://cdn.sobekrepository.org/includes/gmaps-markerwithlabel/1.9.1/gmaps-
markerwithlabel-1.9.1.js" type="text/javascript"></script>
</head>
<body>
<div id="map"></div>

<script type="text/javascript">
// Initialize and add the map
function initMap() {
var xml_data = "<MAP>" +
"<location>1 South Main Street, Akron Ohio</location>" +
"<user_info>" +
"<user_name>Scott jones</user_name>" +
"<user_lat>41.141756</user_lat>" +
"<user_lon>-81.675599</user_lon>" +
"<user_img>https://s3.amazonaws.com/media.wbur.org/wordpress/1/files/2015/03/AP736858445562.jpg</user_img>" +
"</user_info>" +
"<user_info>" +
"<user_name>Bill James</user_name>" +
"<user_lat>41.142758</user_lat>" +
"<user_lon>-81.657274</user_lon>" +
"<user_img>https://s.abcnews.com/images/US/jeff-koenig-ht-ml-190122_hpEmbed_2_4x5_992.jpg</user_img>" +
"</user_info>" +
"<user_info>" +
"<user_name>Karrie Sims</user_name>" +
"<user_lat>41.135809</user_lat>" +
"<user_lon>-81.639336</user_lon>" +
"<user_img>https://www.odmp.org/media/image/officer/23891/orig/police-officer-natalie-corona.jpg</user_img>" +
"</user_info>" +
"<user_info>" +
"<user_name>John Smith</user_name>" +
"<user_lat>41.142855</user_lat>" +
"<user_lon>-81.637319</user_lon>" +
"<user_img>https://www.odmp.org/media/image/officer/24262/400/deputy-sheriff-jake-allmendinger.jpg</user_img>" +
"</user_info>" +
"<user_info>" +
"<user_name>Jim Deek</user_name>" +
"<user_lat>41.131543</user_lat>" +
"<user_lon>-81.653541</user_lon>" +
"<user_img>https://lawofficer.com/wp-content/uploads/2016/10/blakesnyder.jpg</user_img>" +
"</user_info>" +
"</MAP>";

var parser = new DOMParser();
var xmlDoc = parser.parseFromString(xml_data, "text/xml");
var address = xmlDoc.getElementsByTagName("location")[0].textContent;
var users = xmlDoc.getElementsByTagName("user_info");
var user_list = [];

for (var i = 0; i < users.length; i++) {
user_list.push({
"name": users[i].getElementsByTagName("user_name")[0].textContent,
"lat": users[i].getElementsByTagName("user_lat")[0].textContent,
"lng": users[i].getElementsByTagName("user_lon")[0].textContent,
"img": users[i].getElementsByTagName("user_img")[0].textContent
});
}

// The location of US
var map_center = {lat: 39.8283, lng: -98.5795};
// The map, centered at US
var map = new google.maps.Map(document.getElementById('map'), {zoom: 3, center: map_center});

// boundary of all pins
var bounds = new google.maps.LatLngBounds();

// converts address into geolocation with lat and lng
geocoder = new google.maps.Geocoder();
codeAddress(geocoder, map, address);

// adds user_info marker
for (const index in user_list) {
lat = parseFloat(user_list[index]["lat"]);
lng = parseFloat(user_list[index]["lng"]);

var point = {lat: lat, lng: lng}
var lbl_content = "<div style='text-align: center;'><div><img src='" +
user_list[index]["img"] +
"' width='30px' height='38px' style='border: 2px solid #000; display: block; margin: 0 auto;'></div>" +
"<div style='background-color: #000; padding: 2px;'>" +
user_list[index]["name"] +
"</div></div>";
var marker = new MarkerWithLabel({
position: point,
icon: {
url: "./res/police_pin.png",
scaledSize: new google.maps.Size(40, 40)
},
map: map,
title: user_list[index]["name"],
labelContent: lbl_content,
labelAnchor: new google.maps.Point(0, 0),
labelClass: "user_info",
labelInBackground: true
});

// extends boundary
bounds.extend(point);

// shows coordinate tooltip with 4-decisions
// var infowindow = new google.maps.InfoWindow({
// content: lat.toFixed(4) + ", " + lng.toFixed(4)
// });
// infowindow.open(map, marker);
}

// fits map
map.fitBounds(bounds);
}

/////////////////////////////////////////
/// converts address into geolocation ///
/////////////////////////////////////////
function codeAddress(geocoder, map, address) {
geocoder.geocode({'address': address}, function (results, status) {
if (status === 'OK') {
// relocates the map centered at address pin
// map.setCenter(results[0].geometry.location);

var marker = new google.maps.Marker({
map: map,
position: results[0].geometry.location,
icon: {url: "./res/911_call.png", scaledSize: new google.maps.Size(55, 55)}
});

// shows coordinate tooltip with 4-decisions
//lat = results[0].geometry.location.lat();
//lng = results[0].geometry.location.lng();
//var infowindow = new google.maps.InfoWindow({
// content: lat.toFixed(4) + ", " + lng.toFixed(4)
//});
//infowindow.open(map, marker);
} else {
alert('Geocode was not successful for the following reason: ' + status);
}
});
}

////////////////////////////
/// reads local xml file ///
////////////////////////////
function readTextFile(file)
{
var allText = "";
var rawFile = new XMLHttpRequest();
rawFile.open("GET", file, false);
rawFile.onreadystatechange = function ()
{
if (rawFile.readyState === 4)
{
if (rawFile.status === 200 || rawFile.status == 0)
{
allText = rawFile.responseText;
}
}
}
rawFile.send(null);
return allText;
}

initMap();
</script>
</body>
</html>

我已经浏览了很多板并尝试使用代码,但没有任何效果。任何帮助都会很棒。

非常感谢!!!

最佳答案

要确保 map 视口(viewport)内覆盖每个重要位置,您可以使用 map.fitBounds() 方法。根据这个doc ,这个方法

Sets the viewport to contain the given bounds.

我发现您已经实现了此方法来显示每个用户。也就是说,您只需在边界上添加(您所说的)主地址

要将主地址的坐标添加到边界实例中,您只需使用 bounds.extend() 方法。

我检查了site上的代码您可以采取以下措施来实现这一目标:

  1. 将变量 bounds 移至 initMap() 函数上方,使其成为全局变量。
  2. 在您的 codeAddress() 函数中,通过扩展边界来添加主地址坐标。这是一个代码片段:

    // Add the main address' coordinates by using bounds.extend method
    // results[0].geometry.location contains the main address' coordinates
    bounds.extend(results[0].geometry.location);
  3. map.fitBounds() 方法移至步骤 #2 中 bounds.extend() 方法的正下方。

    // fits map
    map.fitBounds(bounds);

这是一个工作 fiddle这是基于您的代码。

关于javascript - Google map 进行调整以包含用户和地址,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/58943290/

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