需要从谷歌地图API获取纬度和经度答案

【问题标题】：Need to get latitude and longitude from google map API需要从谷歌地图API获取纬度和经度
【发布时间】：2016-01-29 10:22:10
【问题描述】：

https://developers.google.com/maps/documentation/javascript/examples/places-searchbox

我正在使用从上面的链接获得的地图。它在我的网站上运行良好。当我搜索一个地方时，该位置将显示在地图中。我需要得到它的经度和纬度，当我点击谷歌地图上的一个地方时，它应该显示在一个文本框中。

代码如下所示

<!DOCTYPE html>
<html>
  <head>
    <meta name="viewport" content="initial-scale=1.0, user-scalable=no">
    <meta charset="utf-8">
    <style>
      html, body {
        height: 100%;
        margin: 0;
        padding: 0;
      }
      #map {
        height: 100%;
      }
.controls {
  margin-top: 10px;
  border: 1px solid transparent;
  border-radius: 2px 0 0 2px;
  box-sizing: border-box;
  -moz-box-sizing: border-box;
  height: 32px;
  outline: none;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.3);
}

#pac-input {
  background-color: #fff;
  font-family: Roboto;
  font-size: 15px;
  font-weight: 300;
  margin-left: 12px;
  padding: 0 11px 0 13px;
  text-overflow: ellipsis;
  width: 300px;
}

#pac-input:focus {
  border-color: #4d90fe;
}

.pac-container {
  font-family: Roboto;
}

#type-selector {
  color: #fff;
  background-color: #4d90fe;
  padding: 5px 11px 0px 11px;
}

#type-selector label {
  font-family: Roboto;
  font-size: 13px;
  font-weight: 300;
}

    </style>
    <title>Places Searchbox</title>
    <style>
      #target {
        width: 345px;
      }
    </style>
  </head>
  <body>
    <input id="pac-input" class="controls" type="text" placeholder="Search Box">
    <div id="map"></div>
    <script>
// This example adds a search box to a map, using the Google Place Autocomplete
// feature. People can enter geographical searches. The search box will return a
// pick list containing a mix of places and predicted search terms.

function initAutocomplete() {
  var map = new google.maps.Map(document.getElementById('map'), {
    center: {lat: -33.8688, lng: 151.2195},
    zoom: 13,
    mapTypeId: google.maps.MapTypeId.ROADMAP
  });

  // Create the search box and link it to the UI element.
  var input = document.getElementById('pac-input');
  var searchBox = new google.maps.places.SearchBox(input);
  map.controls[google.maps.ControlPosition.TOP_LEFT].push(input);

  // Bias the SearchBox results towards current map's viewport.
  map.addListener('bounds_changed', function() {
    searchBox.setBounds(map.getBounds());
  });

  var markers = [];
  // [START region_getplaces]
  // Listen for the event fired when the user selects a prediction and retrieve
  // more details for that place.
  searchBox.addListener('places_changed', function() {
    var places = searchBox.getPlaces();

    if (places.length == 0) {
      return;
    }

    // Clear out the old markers.
    markers.forEach(function(marker) {
      marker.setMap(null);
    });
    markers = [];

    // For each place, get the icon, name and location.
    var bounds = new google.maps.LatLngBounds();
    places.forEach(function(place) {
      var icon = {
        url: place.icon,
        size: new google.maps.Size(71, 71),
        origin: new google.maps.Point(0, 0),
        anchor: new google.maps.Point(17, 34),
        scaledSize: new google.maps.Size(25, 25)
      };

      // Create a marker for each place.
      markers.push(new google.maps.Marker({
        map: map,
        icon: icon,
        title: place.name,
        position: place.geometry.location
      }));

      if (place.geometry.viewport) {
        // Only geocodes have viewport.
        bounds.union(place.geometry.viewport);
      } else {
        bounds.extend(place.geometry.location);
      }
    });
    map.fitBounds(bounds);
  });
  // [END region_getplaces]
}


    </script>
    <script src="https://maps.googleapis.com/maps/api/js?key=AIzaSyAkwr5rmzY9btU08sQlU9N0qfmo8YmE91Y&libraries=places&callback=initAutocomplete"
         async defer></script>
  </body>
</html>

【问题讨论】：

标签： javascript google-maps google-maps-api-3 geolocation

【解决方案1】：

您需要在地图对象上放置一个事件监听器，然后在点击事件发生时获取它的坐标：

map.addListener('click', function (locationdata) {
  document.getElementById("latitude").value =locationdata.latLng.lat();
  document.getElementById("longitude").value =locationdata.latLng.lng();
});

并相应地调整您的 html

【讨论】：

【解决方案2】：

places.forEach(function(place) {
console.log("lat: "+place.geometry.location.lat()+" lng: "+place.geometry.location.lng())
//etc

【讨论】：

是否需要替换代码places.forEach(function(place) { var icon = { url: place.icon, size: new google.maps.Size(71, 71), origin: new google.maps.Point(0, 0), anchor: new google.maps.Point(17, 34), scaledSize: new google.maps.Size(25, 25) 上面的代码？？？
不，上面的代码会将您要查找的坐标记录到控制台。您应该添加该行并保留其他所有内容。虽然如果您想要文本框中的数据，您需要将文本框添加到 html，然后像这样填充它们：document.getElementById('latbox').value=place.geometry.location.lat();
请考虑编辑您的帖子，以添加更多关于您的代码的作用以及它为何能解决问题的说明。大部分只包含代码的答案（即使它正在工作）通常不会帮助 OP 理解他们的问题。
@lucas ...实际上，当我单击地图上的某个位置时，我需要获取每个坐标。我该怎么做？

【解决方案3】：

为每个标记添加一个侦听器，使用它将该标记的位置添加到文本框。

  // Create a marker for each place.
  var marker = new google.maps.Marker({
    map: map,
    icon: icon,
    title: place.name,
    position: place.geometry.location
  });
  google.maps.event.addListener(marker,'click',function(evt) {
      document.getElementById('coordinates').value = marker.getPosition().toUrlValue(6);
  });
  markers.push(marker);

proof of concept fiddle

代码 sn-p：

// This example adds a search box to a map, using the Google Place Autocomplete
// feature. People can enter geographical searches. The search box will return a
// pick list containing a mix of places and predicted search terms.
// clicked marker coordinates will be placed in the input text element with id="coordinates"

function initAutocomplete() {
  var map = new google.maps.Map(document.getElementById('map'), {
    center: {
      lat: -33.8688,
      lng: 151.2195
    },
    zoom: 13,
    mapTypeId: google.maps.MapTypeId.ROADMAP
  });

  // Create the search box and link it to the UI element.
  var input = document.getElementById('pac-input');
  var searchBox = new google.maps.places.SearchBox(input);
  map.controls[google.maps.ControlPosition.TOP_LEFT].push(input);

  // Bias the SearchBox results towards current map's viewport.
  map.addListener('bounds_changed', function() {
    searchBox.setBounds(map.getBounds());
  });

  var markers = [];
  // [START region_getplaces]
  // Listen for the event fired when the user selects a prediction and retrieve
  // more details for that place.
  searchBox.addListener('places_changed', function() {
    var places = searchBox.getPlaces();

    if (places.length == 0) {
      return;
    }

    // Clear out the old markers.
    markers.forEach(function(marker) {
      marker.setMap(null);
    });
    markers = [];

    // For each place, get the icon, name and location.
    var bounds = new google.maps.LatLngBounds();
    places.forEach(function(place) {
      var icon = {
        url: place.icon,
        size: new google.maps.Size(71, 71),
        origin: new google.maps.Point(0, 0),
        anchor: new google.maps.Point(17, 34),
        scaledSize: new google.maps.Size(25, 25)
      };

      // Create a marker for each place.
      var marker = new google.maps.Marker({
        map: map,
        icon: icon,
        title: place.name,
        position: place.geometry.location
      });
      google.maps.event.addListener(marker, 'click', function(evt) {
        document.getElementById('coordinates').value = marker.getPosition().toUrlValue(6);
      });
      markers.push(marker);
      if (place.geometry.viewport) {
        // Only geocodes have viewport.
        bounds.union(place.geometry.viewport);
      } else {
        bounds.extend(place.geometry.location);
      }
    });
    map.fitBounds(bounds);
  });
  // [END region_getplaces]
}
google.maps.event.addDomListener(window, 'load', initAutocomplete);

html,
body {
  height: 100%;
  margin: 0;
  padding: 0;
}
#map {
  height: 100%;
}
.controls {
  margin-top: 10px;
  border: 1px solid transparent;
  border-radius: 2px 0 0 2px;
  box-sizing: border-box;
  -moz-box-sizing: border-box;
  height: 32px;
  outline: none;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.3);
}
#pac-input {
  background-color: #fff;
  font-family: Roboto;
  font-size: 15px;
  font-weight: 300;
  margin-left: 12px;
  padding: 0 11px 0 13px;
  text-overflow: ellipsis;
  width: 300px;
}
#pac-input:focus {
  border-color: #4d90fe;
}
.pac-container {
  font-family: Roboto;
}
#type-selector {
  color: #fff;
  background-color: #4d90fe;
  padding: 5px 11px 0px 11px;
}
#type-selector label {
  font-family: Roboto;
  font-size: 13px;
  font-weight: 300;
}
#target {
  width: 345px;
}

<script src="https://maps.googleapis.com/maps/api/js?libraries=places"></script>
<input id="coordinates" type="text" size="30" />
<input id="pac-input" class="controls" type="text" placeholder="Search Box">
<div id="map"></div>

【讨论】：

@geocodezip...但是当我点击easch地点时如何更改坐标？？
点击标记时坐标会发生变化。在搜索框中选择一个条目可以有多个结果。

【解决方案4】：

您已经在地点收集位置数据，您可以使用循环。这是最简单的方法。

 for (var i = 0, place; place = places[i]; i++) {

      alert("latitude: "+place.geometry.location.lat()+" longitude: "+place.geometry.location.lng());


 });

如果你想在数组中添加它

var locationArray[];

for (var i = 0, place; place = places[i]; i++) {

      alert("latitude: "+place.geometry.location.lat()+" longitude: "+place.geometry.location.lng());

      locationArray[i]= places[i].geometry.location;

 });

这里是代码示例jsfiddle

【讨论】：

嗨...我正在获取坐标。实际上，当我单击地图上的某个位置时，我需要获取每个坐标。我该怎么做？
检查编辑的答案，如果它帮助你不要忘记将其标记为正确