问谷歌地图Api附近搜索-为什么google.maps.places.RankBy.DISTANCE返回的结果较少？
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Stack Overflow用户

提问于 2015-12-22 23:05:33

回答 1查看 1.4K关注 0票数 0

正如标题所述。我尝试了google.maps.places.RankBy.PROMINENCE (默认)，并将半径设置为50000，结果返回了20个结果。但当我尝试完全相同的搜索时，减去文档中的半径，并且使用google.maps.places.RankBy.DISTANCE，我只返回我所在位置的短半径内的3个结果。谁能解释一下为什么会发生这种情况，以及如何根据距离进行附近的搜索并获得完整的结果。也许我只是做错了什么。谢谢。

下面的代码使用google.maps.places.RankBy.PROMINENCE返回20个结果

var map;
var infowindow;

function initMap() {
  var location = {lat: 43.139387, lng: -80.264425};

  map = new google.maps.Map(document.getElementById('map'), {
    center: location,
    zoom: 9
  });

  infowindow = new google.maps.InfoWindow();

  var service = new google.maps.places.PlacesService(map);
  service.nearbySearch({
    location: location,
    radius: 50000,
    types: ['police'],
    // rankBy: google.maps.places.RankBy.DISTANCE
  }, callback);
}

function callback(results, status) {
  if (status === google.maps.places.PlacesServiceStatus.OK) {
    for (var i = 0; i < results.length; i++) {
      createMarker(results[i]);
    }
  }
}

function createMarker(place) {
  var placeLoc = place.geometry.location;
  var marker = new google.maps.Marker({
    map: map,
    position: place.geometry.location
  });

  google.maps.event.addListener(marker, 'click', function() {
    infowindow.setContent(place.name);
    infowindow.open(map, this);
  });
}

<!DOCTYPE html>
<html>
  <head>
    <title>Place searches</title>
    <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%;
      }
    </style>

  </head>
  <body>
    <div id="map"></div>
    <script src="https://maps.googleapis.com/maps/api/js?sensor=false&signed_in=true&libraries=places&callback=initMap" async defer></script>
  </body>
</html>

当使用google.maps.places.RankBy.DISTANCE时，下面的代码只返回3个结果

var map;
var infowindow;

function initMap() {
  var location = {lat: 43.139387, lng: -80.264425};

  map = new google.maps.Map(document.getElementById('map'), {
    center: location,
    zoom: 9
  });

  infowindow = new google.maps.InfoWindow();

  var service = new google.maps.places.PlacesService(map);
  service.nearbySearch({
    location: location,
    // radius: 50000,
    types: ['police'],
    rankBy: google.maps.places.RankBy.DISTANCE
  }, callback);
}

function callback(results, status) {
  if (status === google.maps.places.PlacesServiceStatus.OK) {
    for (var i = 0; i < results.length; i++) {
      createMarker(results[i]);
    }
  }
}

function createMarker(place) {
  var placeLoc = place.geometry.location;
  var marker = new google.maps.Marker({
    map: map,
    position: place.geometry.location
  });

  google.maps.event.addListener(marker, 'click', function() {
    infowindow.setContent(place.name);
    infowindow.open(map, this);
  });
}

<!DOCTYPE html>
<html>
  <head>
    <title>Place searches</title>
    <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%;
      }
    </style>

  </head>
  <body>
    <div id="map"></div>
    <script src="https://maps.googleapis.com/maps/api/js?sensor=false&signed_in=true&libraries=places&callback=initMap" async defer></script>
  </body>
</html>