我正在使用路线服务来计算使用地址查找的两个地址之间的距离，这一切似乎都运行正常，我唯一的问题是如果您搜索相同的拾取和目的地的示例，它将返回12米（米）而不是公里，所以它给了我错误的计算，用于以米为单位返回值的非常短的旅程。
有没有办法可以让它只发送KM？
（另外，不确定是否有可能在Miles中获得价值，就像我从KM转换它一样）
以下是代码： -
var location1;
var location2;
var address1;
var address2;
var latlng;
var geocoder;
var map;
var distance;
// finds the coordinates for the two locations and calls the showMap() function
function initialize()
{
geocoder = new google.maps.Geocoder(); // creating a new geocode object
// getting the two address values
address1 = document.getElementById("pstreet").value;
address2 = document.getElementById("dstreet").value;
// finding out the coordinates
if (geocoder)
{
geocoder.geocode( { 'address': address1}, function(results, status)
{
if (status == google.maps.GeocoderStatus.OK)
{
//location of first address (latitude + longitude)
location1 = results[0].geometry.location;
} else
{
//alert("Geocode was not successful for the following reason: " + status);
}
});
geocoder.geocode( { 'address': address2}, function(results, status)
{
if (status == google.maps.GeocoderStatus.OK)
{
//location of second address (latitude + longitude)
location2 = results[0].geometry.location;
// calling the showMap() function to create and show the map
showMap();
} else
{
//alert("Geocode was not successful for the following reason: " + status);
}
});
}
}
// creates and shows the map
function showMap()
{
// center of the map (compute the mean value between the two locations)
latlng = new google.maps.LatLng((location1.lat()+location2.lat())/2,(location1.lng()+location2.lng())/2);
// set map options
// set zoom level
// set center
// map type
var mapOptions =
{
zoom: 1,
center: latlng,
mapTypeId: google.maps.MapTypeId.HYBRID
};
// create a new map object
// set the div id where it will be shown
// set the map options
map = new google.maps.Map(document.getElementById("map_canvas"), mapOptions);
// show route between the points
directionsService = new google.maps.DirectionsService();
directionsDisplay = new google.maps.DirectionsRenderer(
{
suppressMarkers: true,
suppressInfoWindows: true
});
directionsDisplay.setMap(map);
var request = {
origin:location1,
destination:location2,
travelMode: google.maps.DirectionsTravelMode.DRIVING
};
directionsService.route(request, function(response, status)
{
if (status == google.maps.DirectionsStatus.OK)
{
directionsDisplay.setDirections(response);
distance = response.routes[0].legs[0].distance.text;
console.log(distance);
distance_KM = distance.slice(0, -2); // remove KM from kilometers to get KM int
nearest_KM = Math.round(distance_KM);
// Convert kilometers into mileage
var km = parseFloat(nearest_KM);
var mi = "";
if (!isNaN(km)) mi = km * 0.621371192;
distance_MI = Math.round(mi);
$('#mileage').html(distance_MI);
driving_time = "Aproximative driving time is: "+response.routes[0].legs[0].duration.text;
$('#time').html(driving_time);
}
});
// compute distance between the two points
var R = 6371;
var dLat = toRad(location2.lat()-location1.lat());
var dLon = toRad(location2.lng()-location1.lng());
var dLat1 = toRad(location1.lat());
var dLat2 = toRad(location2.lat());
var a = Math.sin(dLat/2) * Math.sin(dLat/2) +
Math.cos(dLat1) * Math.cos(dLat1) *
Math.sin(dLon/2) * Math.sin(dLon/2);
var c = 2 * Math.atan2(Math.sqrt(a), Math.sqrt(1-a));
var d = R * c;
}
function toRad(deg)
{
return deg * Math.PI/180;
}
答案 0 :(得分：2)
而不是：
response.routes[0].legs[0].distance.text;
使用：
response.routes[0].legs[0].distance.value;
总是以米为单位。
distance = response.routes[0].legs[0].distance.value; // meters
distance_KM = distance / 1000; // convert to kilometers
google.maps.Distance对象规范
将距离表示为数值和显示字符串。
<强>属性
值 |输入：数字
以米为单位的距离。
代码段
var location1;
var location2;
var address1;
var address2;
var latlng;
var geocoder;
var map;
var distance;
// finds the coordinates for the two locations and calls the showMap() function
function initialize() {
geocoder = new google.maps.Geocoder(); // creating a new geocode object
// getting the two address values
address1 = document.getElementById("pstreet").value;
address2 = document.getElementById("dstreet").value;
// finding out the coordinates
if (geocoder) {
geocoder.geocode({
'address': address1
}, function(results, status) {
if (status == google.maps.GeocoderStatus.OK) {
//location of first address (latitude + longitude)
location1 = results[0].geometry.location;
} else {
//alert("Geocode was not successful for the following reason: " + status);
}
});
geocoder.geocode({
'address': address2
}, function(results, status) {
if (status == google.maps.GeocoderStatus.OK) {
//location of second address (latitude + longitude)
location2 = results[0].geometry.location;
// calling the showMap() function to create and show the map
showMap();
} else {
//alert("Geocode was not successful for the following reason: " + status);
}
});
}
}
// creates and shows the map
function showMap() {
// center of the map (compute the mean value between the two locations)
latlng = new google.maps.LatLng((location1.lat() + location2.lat()) / 2, (location1.lng() + location2.lng()) / 2);
// set map options
// set zoom level
// set center
// map type
var mapOptions = {
zoom: 1,
center: latlng,
mapTypeId: google.maps.MapTypeId.HYBRID
};
// create a new map object
// set the div id where it will be shown
// set the map options
map = new google.maps.Map(document.getElementById("map_canvas"), mapOptions);
// show route between the points
directionsService = new google.maps.DirectionsService();
directionsDisplay = new google.maps.DirectionsRenderer({
suppressMarkers: true,
suppressInfoWindows: true
});
directionsDisplay.setMap(map);
var request = {
origin: location1,
destination: location2,
travelMode: google.maps.DirectionsTravelMode.DRIVING
};
directionsService.route(request, function(response, status) {
if (status == google.maps.DirectionsStatus.OK) {
directionsDisplay.setDirections(response);
distance = response.routes[0].legs[0].distance.value;
console.log(distance);
distance_KM = distance / 1000; // remove KM from kilometers to get KM int
nearest_KM = Math.round(distance_KM);
// Convert kilometers into mileage
var km = parseFloat(nearest_KM);
var mi = "";
if (!isNaN(km)) mi = km * 0.621371192;
distance_MI = Math.round(mi);
$('#mileage').html(distance_MI + " miles");
driving_time = "Aproximative driving time is: " + response.routes[0].legs[0].duration.text;
$('#time').html(driving_time);
}
});
}
google.maps.event.addDomListener(window, "load", initialize);html,
body,
#map_canvas {
height: 100%;
width: 100%;
margin: 0px;
padding: 0px
}<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<script src="https://maps.googleapis.com/maps/api/js?libraries=geometry"></script>
<input id="pstreet" value="New York,NY" />
<input id="dstreet" value="Newark, NJ" />
<input type="button" onclick="initialize()" value="recalculate" />
<div id="mileage"></div>
<div id="time"></div>
<div id="map_canvas"></div>