javascript - 反向地理编码示例不显示某些区域中某个位置的街道名称

Question

This reverse geocoding code不返回某些地区某个位置的街道名称(例如:{36.82687, 10.09948})，实际上，尽管街道名称在 map 上可用，但实际上我只得到城镇和国家的名称。我想知道是否有技巧可以获取这些地区的街道名称？

感谢您的帮助。

Answer 1

您引用的示例返回结果数组中第二个条目(“[1]”)的 formatted_address。最详细的条目通常是第一个条目(“[0]”)。如果我更改代码以使用它，我就会得到街道名称。

proof of concept fiddle

function initMap() {
  var map = new google.maps.Map(document.getElementById('map'), {
    zoom: 8,
    center: {
      lat: 40.731,
      lng: -73.997
    }
  });
  var geocoder = new google.maps.Geocoder;
  var infowindow = new google.maps.InfoWindow;

  document.getElementById('submit').addEventListener('click', function() {
    geocodeLatLng(geocoder, map, infowindow);
  });
}

function geocodeLatLng(geocoder, map, infowindow) {
  var input = document.getElementById('latlng').value;
  var latlngStr = input.split(',', 2);
  var latlng = {
    lat: parseFloat(latlngStr[0]),
    lng: parseFloat(latlngStr[1])
  };
  geocoder.geocode({
    'location': latlng
  }, function(results, status) {
    if (status === google.maps.GeocoderStatus.OK) {
      if (results[0]) {
        map.setZoom(11);
        var marker = new google.maps.Marker({
          position: latlng,
          map: map
        });
        infowindow.setContent(results[0].formatted_address);
        infowindow.open(map, marker);
        map.setCenter(latlng);
      } else {
        window.alert('No results found');
      }
    } else {
      window.alert('Geocoder failed due to: ' + status);
    }
  });
}
google.maps.event.addDomListener(window, 'load', initMap);

html,
body {
  height: 100%;
  margin: 0;
  padding: 0;
}
#map {
  height: 100%;
}
#floating-panel {
  position: absolute;
  top: 10px;
  left: 25%;
  z-index: 5;
  background-color: #fff;
  padding: 5px;
  border: 1px solid #999;
  text-align: center;
  font-family: 'Roboto', 'sans-serif';
  line-height: 30px;
  padding-left: 10px;
}
</style> <style> #floating-panel {
  position: absolute;
  top: 5px;
  left: 50%;
  margin-left: -180px;
  width: 350px;
  z-index: 5;
  background-color: #fff;
  padding: 5px;
  border: 1px solid #999;
}
#latlng {
  width: 225px;
}

<script src="https://maps.googleapis.com/maps/api/js"></script>
<div id="floating-panel">
  <input id="latlng" type="text" value="36.82687, 10.09948">
  <input id="submit" type="button" value="Reverse Geocode">
</div>
<div id="map"></div>

如果您确实只需要街道名称，则不应依赖于结果数组中的条目，您应该迭代第一个(最精确)条目的结果，查找address_component类型为 route

proof of concept fiddle

代码片段:

var marker;

function initMap() {
  var map = new google.maps.Map(document.getElementById('map'), {
    zoom: 8,
    center: {
      lat: 40.731,
      lng: -73.997
    }
  });
  var geocoder = new google.maps.Geocoder();
  var infowindow = new google.maps.InfoWindow();
  google.maps.event.addListener(map, 'click', function(evt) {
    geocodeLatLng(evt.latLng, geocoder, map, infowindow);
  });
  document.getElementById('submit').addEventListener('click', function() {
    geocodeLatLngForm(geocoder, map, infowindow);
  });
}

function geocodeLatLngForm(geocoder, map, infowindow) {
  var input = document.getElementById('latlng').value;
  var latlngStr = input.split(',', 2);
  var latlng = {
    lat: parseFloat(latlngStr[0]),
    lng: parseFloat(latlngStr[1])
  };
  geocodeLatLng(latlng, geocoder, map, infowindow);
}

function geocodeLatLng(latlng, geocoder, map, infowindow) {
  geocoder.geocode({
    'location': latlng
  }, function(results, status) {
    if (status === google.maps.GeocoderStatus.OK) {
      if (results[0]) {
        map.setZoom(15);
        if (marker && marker.setMap) {
          marker.setMap(null);
        }
        marker = new google.maps.Marker({
          position: latlng,
          map: map
        });
        map.setCenter(latlng);
        // find the street name of the first entry
        var street_name = "not available";
        for (var i = 0; i < results[0].address_components.length; i++) {
          for (var j = 0; j < results[0].address_components[i].types.length; j++) {

            if (results[0].address_components[i].types[j] == "route") {
              street_name = results[0].address_components[i].long_name;
              break;
            }
          }
        }
        infowindow.setContent(street_name);
        infowindow.open(map, marker);
      } else {
        window.alert('No results found');
      }
    } else {
      window.alert('Geocoder failed due to: ' + status);
    }
  });
}
google.maps.event.addDomListener(window, 'load', initMap);

html,
body {
  height: 100%;
  margin: 0;
  padding: 0;
}
#map {
  height: 100%;
}
#floating-panel {
  position: absolute;
  top: 10px;
  left: 25%;
  z-index: 5;
  background-color: #fff;
  padding: 5px;
  border: 1px solid #999;
  text-align: center;
  font-family: 'Roboto', 'sans-serif';
  line-height: 30px;
  padding-left: 10px;
}
</style> <style> #floating-panel {
  position: absolute;
  top: 5px;
  left: 50%;
  margin-left: -180px;
  width: 350px;
  z-index: 5;
  background-color: #fff;
  padding: 5px;
  border: 1px solid #999;
}
#latlng {
  width: 225px;
}

<script src="https://maps.googleapis.com/maps/api/js"></script>
<div id="floating-panel">
  <input id="latlng" type="text" value="36.82687, 10.09948">
  <input id="submit" type="button" value="Reverse Geocode">
</div>
<div id="map"></div>