我正在寻找两点之间的驾驶路线,其中一个或两个点没有直接通往它的道路,但靠近它。
例如,如果您使用DirectionsService尝试在Moab,UT和Zion National Park,UT之间创建一条驱动线,那么您将获得Zero_Results,因为没有通往ZION的中心(纬度,由谷歌返回的lng)的道路国家公园。如果您在google.com/maps上执行相同操作,则会看到从摩押到锡安国家公园东入口的驱动线,然后步行到公园中心(放置销钉的位置)。他们是如何决定前往锡安国家公园的?
答案 0 :(得分:1)
如果你reverse geocode地理编码器为锡安国家公园返回的坐标(37.2982022,-113.0263005),第一个结果将是最近的路上位置。
代码段
var geocoder;
var directionsService = new google.maps.DirectionsService();
var directionsDisplay = new google.maps.DirectionsRenderer();
function initialize() {
var map = new google.maps.Map(
document.getElementById("map_canvas"), {
center: new google.maps.LatLng(37.4419, -122.1419),
zoom: 13,
mapTypeId: google.maps.MapTypeId.ROADMAP
});
var start = "Moab, UT";
directionsDisplay.setMap(map);
geocodeAddress("Zion National Park", start);
}
function geocodeAddress(address, start) {
var geocoder = new google.maps.Geocoder();
geocoder.geocode({
'address': address
}, function(results, status) {
if (status === google.maps.GeocoderStatus.OK) {
geocoder.geocode({
'location': results[0].geometry.location
}, function(results, status) {
if (status === google.maps.GeocoderStatus.OK) {
calculateAndDisplayRoute(start, results[0].geometry.location)
} else {
window.alert('Reverse Geocode failed due to: ' + status);
}
});
} else {
alert('Geocode was not successful for the following reason: ' + status);
}
});
}
function calculateAndDisplayRoute(start, end) {
directionsService.route({
origin: start,
destination: end,
travelMode: google.maps.TravelMode.DRIVING
}, function(response, status) {
if (status === google.maps.DirectionsStatus.OK) {
directionsDisplay.setDirections(response);
} else {
window.alert('Directions request failed due to ' + status);
}
});
}
google.maps.event.addDomListener(window, "load", initialize);

html,
body,
#map_canvas {
height: 100%;
width: 100%;
margin: 0px;
padding: 0px
}

<script src="https://maps.googleapis.com/maps/api/js"></script>
<div id="map_canvas"></div>
&#13;