从数据库中获取标记并在Google地图上显示

时间:2015-07-13 06:25:21

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

我有一个适用于静态值的谷歌地图,显示不同颜色标记的不同地方。但是我希望这个动态并从数据库中获取标记的位置

数据库结构将是这样的

id   latitude     longitude     status
1   -33.890542    151.274856      1
2   -33.923036    151.259052      1
3   -34.028249    151.157507      2
4   -33.80010     151.28747       1
5   -33.950198    151.259302      2

我希望状态为1的位置应为一种颜色,状态为2的位置应为另一种颜色。

目前我的代码是

var locations = [
  ['<h4>Bondi Beach</h4>', -33.890542, 151.274856],
  ['<h4>Coogee Beach</h4>', -33.923036, 151.259052],
  ['<h4>Cronulla Beach</h4>', -34.028249, 151.157507],
  ['<h4>Manly Beach</h4>', -33.80010128657071, 151.28747820854187],
  ['<h4>Maroubra Beach</h4>', -33.950198, 151.259302]
];

// Setup the different icons and shadows
var iconURLPrefix = 'http://maps.google.com/mapfiles/ms/icons/';

var icons = [
  iconURLPrefix + 'red-dot.png',
  iconURLPrefix + 'green-dot.png',
  iconURLPrefix + 'blue-dot.png',
  iconURLPrefix + 'orange-dot.png',
  iconURLPrefix + 'purple-dot.png',
  iconURLPrefix + 'pink-dot.png',      
  iconURLPrefix + 'yellow-dot.png'
]
var iconsLength = icons.length;

var map = new google.maps.Map(document.getElementById('map'), {
  zoom: 10,
  center: new google.maps.LatLng(-37.92, 151.25),
  mapTypeId: google.maps.MapTypeId.ROADMAP,
  mapTypeControl: false,
  streetViewControl: false,
  panControl: false,
  zoomControlOptions: {
     position: google.maps.ControlPosition.LEFT_BOTTOM
  }
});

var infowindow = new google.maps.InfoWindow({
  maxWidth: 160
});

var markers = new Array();

var iconCounter = 0;

// Add the markers and infowindows to the map
for (var i = 0; i < locations.length; i++) {  
  var marker = new google.maps.Marker({
    position: new google.maps.LatLng(locations[i][1], locations[i][2]),
    map: map,
    icon: icons[iconCounter]
  });

  markers.push(marker);

  google.maps.event.addListener(marker, 'click', (function(marker, i) {
    return function() {
      infowindow.setContent(locations[i][0]);
      infowindow.open(map, marker);
    }
  })(marker, i));

  iconCounter++;
  // We only have a limited number of possible icon colors, so we may have to restart the counter
  if(iconCounter >= iconsLength) {
    iconCounter = 0;
  }
}

function autoCenter() {
  //  Create a new viewpoint bound
  var bounds = new google.maps.LatLngBounds();
  //  Go through each...
  for (var i = 0; i < markers.length; i++) {  
            bounds.extend(markers[i].position);
  }
  //  Fit these bounds to the map
  map.fitBounds(bounds);
}
autoCenter();

任何人都可以告诉我如何根据数据库中的状态获取标记的位置,并根据纬度和经度的状态给它们添加不同的颜色

1 个答案:

答案 0 :(得分:0)

Google Maps是一种客户端API。您的标记存储在服务器端数据库中

不要混淆。

使用标准服务器端技术,输出带有位置变量的JavaScript变量:

<?php
$locationsString = '[';
for ($i = 0; $i < count($locations); $i++) {
  if ($i > 0) {
    $locationsString .= ', ';
  }
  $locationsString .= '[' . $locations['title'] . ', ' .
      $locations['lat'] . ', ' . $locations['lng'] . ']'; 
}
echo '<script>var locations="' . $locationsString . '";</script>';
?>

这个基本想法几乎有无数变化。例如,你可以retrieve the variable data via an AJAX call