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谷歌地图:在标记中放置数字?

google-maps-markers gis google-maps javascript

User · 技术社区 · 15 年前

11 回复 | 直到 13 年前

Jerome Jaglale theRana 12 年前

icon: 'http://chart.apis.google.com/chart?chst=d_map_pin_letter&chld=1|FE6256|000000'

1位数和2位数看起来不错

(摘自毛罗的链接)

Concept211 9 年前

下面是带有更新的“视觉刷新”样式的自定义图标,您可以通过一个简单的.vbs脚本快速生成这些图标。我还提供了一个大的预生成集,您可以立即使用多个颜色选项: https://github.com/Concept211/Google-Maps-Markers

https://raw.githubusercontent.com/Concept211/Google-Maps-Markers/master/images/marker_[color][character].png

颜色

red, black, blue, green, grey, orange, purple, white, yellow

A-Z, 1-100, !, @, $, +, -, =, (%23 = #), (%25 = %), (%26 = &), (blank = â¢)

示例:

https://raw.githubusercontent.com/Concept211/Google-Maps-Markers/master/images/marker_red1.png

https://raw.githubusercontent.com/Concept211/Google-Maps-Markers/master/images/marker_blue2.png

https://raw.githubusercontent.com/Concept211/Google-Maps-Markers/master/images/marker_green3.png

Estevão Lucas 10 年前

而不是使用默认解决方案( http://chart.apis.google.com/chart?chst=d_map_pin_letter&chld=7|FF0000|000000 ),您可以根据需要使用JavaScript创建这些图像,而不需要任何服务器端代码。

谷歌google.maps.Marker接受Base64作为其icon属性。有了它,我们可以从SVG创建一个有效的Base64。

您可以在这个Plunker中看到生成与此图像相同的代码: http://plnkr.co/edit/jep5mVN3DsVRgtlz1GGQ?p=preview

var markers = [
  [1002, -14.2350040, -51.9252800],
  [2000, -34.028249, 151.157507],
  [123, 39.0119020, -98.4842460],
  [50, 48.8566140, 2.3522220],
  [22, 38.7755940, -9.1353670],
  [12, 12.0733335, 52.8234367],
];

function initializeMaps() {
  var myLatLng = {
    lat: -25.363,
    lng: 131.044
  };

  var map = new google.maps.Map(document.getElementById('map_canvas'), {
    zoom: 4,
    center: myLatLng
  });

  var bounds = new google.maps.LatLngBounds();

  markers.forEach(function(point) {
    generateIcon(point[0], function(src) {
      var pos = new google.maps.LatLng(point[1], point[2]);

      bounds.extend(pos);

      new google.maps.Marker({
        position: pos,
        map: map,
        icon: src
      });
    });
  });

  map.fitBounds(bounds);
}

var generateIconCache = {};

function generateIcon(number, callback) {
  if (generateIconCache[number] !== undefined) {
    callback(generateIconCache[number]);
  }

  var fontSize = 16,
    imageWidth = imageHeight = 35;

  if (number >= 1000) {
    fontSize = 10;
    imageWidth = imageHeight = 55;
  } else if (number < 1000 && number > 100) {
    fontSize = 14;
    imageWidth = imageHeight = 45;
  }

  var svg = d3.select(document.createElement('div')).append('svg')
    .attr('viewBox', '0 0 54.4 54.4')
    .append('g')

  var circles = svg.append('circle')
    .attr('cx', '27.2')
    .attr('cy', '27.2')
    .attr('r', '21.2')
    .style('fill', '#2063C6');

  var path = svg.append('path')
    .attr('d', 'M27.2,0C12.2,0,0,12.2,0,27.2s12.2,27.2,27.2,27.2s27.2-12.2,27.2-27.2S42.2,0,27.2,0z M6,27.2 C6,15.5,15.5,6,27.2,6s21.2,9.5,21.2,21.2c0,11.7-9.5,21.2-21.2,21.2S6,38.9,6,27.2z')
    .attr('fill', '#FFFFFF');

  var text = svg.append('text')
    .attr('dx', 27)
    .attr('dy', 32)
    .attr('text-anchor', 'middle')
    .attr('style', 'font-size:' + fontSize + 'px; fill: #FFFFFF; font-family: Arial, Verdana; font-weight: bold')
    .text(number);

  var svgNode = svg.node().parentNode.cloneNode(true),
    image = new Image();

  d3.select(svgNode).select('clippath').remove();

  var xmlSource = (new XMLSerializer()).serializeToString(svgNode);

  image.onload = (function(imageWidth, imageHeight) {
    var canvas = document.createElement('canvas'),
      context = canvas.getContext('2d'),
      dataURL;

    d3.select(canvas)
      .attr('width', imageWidth)
      .attr('height', imageHeight);

    context.drawImage(image, 0, 0, imageWidth, imageHeight);

    dataURL = canvas.toDataURL();
    generateIconCache[number] = dataURL;

    callback(dataURL);
  }).bind(this, imageWidth, imageHeight);

  image.src = 'data:image/svg+xml;base64,' + btoa(encodeURIComponent(xmlSource).replace(/%([0-9A-F]{2})/g, function(match, p1) {
    return String.fromCharCode('0x' + p1);
  }));
}

initializeMaps();

#map_canvas {
  width: 100%;
  height: 300px;
}

<!DOCTYPE html>
<html>

  <head>
    <link rel="stylesheet" href="style.css">
    
    <script type="text/javascript" src="http://maps.google.com/maps/api/js?sensor=false"></script>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/d3/3.5.5/d3.min.js"></script>
    
  </head>

  <body>
    <div id="map_canvas"></div>
  </body>
  
  <script src="script.js"></script>

</html>

在这个演示中,我使用D3.js创建SVG,然后将SVG转换为Canvas,这样我可以根据需要调整图像大小,然后使用Canvas的toDataURL方法获得Base64。

@蒂亚戈·马塔 的代码。他真是太好了。

Valery Viktorovsky 9 年前

google.maps.MarkerLabel 对象。

因此,您可以轻松设置标签的文本/样式

var mIcon = {
  path: google.maps.SymbolPath.CIRCLE,
  fillOpacity: 1,
  fillColor: '#fff',
  strokeOpacity: 1,
  strokeWeight: 1,
  strokeColor: '#333',
  scale: 12
};

var gMarker = new google.maps.Marker({
  map: gmap,
  position: latLng,
  title: 'Number 123',
  icon: mIcon,
  label: {color: '#000', fontSize: '12px', fontWeight: '600',
    text: '123'}
});

jsfiddle

Mauro 14 年前

http://biostall.com/adding-number-or-letters-to-google-maps-api-markers

这看起来不是最好的解决方案,但确实有效。

Sameh Deabes 15 年前

你可以用标签代替标记, here is a tutorial about GIcon.label

你也可以使用 GMarker.openInfoWindow .

This is the best tutorial Official documentation )

Jules Colle 8 年前

最简单的解决方案:

marker = new google.maps.Marker({
  position: my_position,
  map: map,
  label: num_events+'' //Needs to be a string. No integers allowed
});

https://developers.google.com/maps/documentation/javascript/examples/marker-labels

有关对标记布局的更多控制,请参见 Valery Viktorovsky's answer

Selva Raj 13 年前

while creating marker use the 

<script>
var marker = new google.maps.Marker({
            position: myLanLat,
            icon:'icon: 'https://chart.googleapis.com/chart?chst=d_map_pin_letter&chld='+ (position) +'|FF776B|000000',
            map: map,
                  });
<script>

joshua 13 年前

<hr/>
1. add Google maps script To _Layout page.<br/>
     &lt;script type="text/javascript" src="http://maps.google.com/maps/api/js?sensor=false"&gt;   &lt;/script &gt;
<hr/>
2. Add script to your view page.

  &lt;script type="text/javascript" &gt;<br/>
   var mapLocation = [['Lucknow', 26.74561, 80.859375],<br/>
                    ['New Delhi', 28.613459, 77.695313],<br/>
                    ['Jaipur', 26.980829, 75.849609],<br/>
                    ['Ahmedabad', 22.674847, 72.333984],<br/>
                    ['Mumbai', 18.760713, 73.015135]];<br/>
    $(document).ready(function () { initialize(); });

function initialize() {<br/>
        var latLng = new google.maps.LatLng(22.917923, 76.992188);<br/>
        var myOptions = { center: latLng, zoom: 10,
            mapTypeId: google.maps.MapTypeId.ROADMAP
        };<br/>
        var map = new google.maps.Map(document.getElementById("map_canvas"), myOptions);

        setMarker(map, mapLocation);
    }

function setMarker(map, mapLoc) {
    for (i = 0; i < mapLoc.length; i++) {
        var loca = mapLoc[i];
        var myLanLat = new google.maps.LatLng(loca[1], loca[2]);
        var marker = new google.maps.Marker({
            position: myLanLat,
            icon:'https://chart.googleapis.com/chart?chst=d_map_pin_letter&chld='+ ( i     + 1) +'|FF776B|000000',
            shadow:'https://chart.googleapis.com/chart?chst=d_map_pin_shadow',
            map: map,
            tittle: loca[0],
            zIndex: loca[3]
        });
    }
}

Szymon 12 年前

上面的链接(' http://chart.apis.google.com/chart?chst=d_map_pin_letter&chld=1|FE6256|000000 ')无法通过SSL使用。要在本地生成和存储数字图像:

for i in {1..99}; do curl -o ./${i}_map_icon.png  "http://chart.apis.google.com/chart?chst=d_map_pin_letter&chld=${i}|FE6256|000000"; echo $i; done

CalvT 9 年前

最好的解决方案是通过url将远程或本地图像和文本传递给服务器端脚本。当绘制标记时,您将使用这个url作为图标的值,服务器端脚本将返回一个您提供的图像的副本(注意,服务器上从未保存过),其中包含烘焙到图像中的文本。因此,当您将数字或文本放到地图上时,您可以在自定义标记图像上实时渲染数字或文本。

这是教程如何做到这一点。- http://www.devinrolsen.com/google-maps-marker-icons-with-numbers-using-php-gd/