谷歌地图:地点号码在标记？
Use*_*ser 39 javascript gis google-maps google-maps-markers
如何在Google地图上的标记中显示数字？我想做服务器端集群,我需要显示集群代表的点数.
Jer*_*ale 43
icon: 'http://chart.apis.google.com/chart?chst=d_map_pin_letter&chld=1|FE6256|000000'
1位和2位数字看起来很好
(来自Mauro的链接)
Con*_*211 15
以下是具有更新的"可视刷新"样式的自定义图标,您可以通过简单的.vbs脚本快速生成.我还包括一个大型的预生成集,您可以立即使用多种颜色选项:https://github.com/Concept211/Google-Maps-Markers
链接到GitHub托管的图像文件时,请使用以下格式:
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
字符
A-Z, 1-100, !, @, $, +, -, =, (%23 = #), (%25 = %), (%26 = &), (blank = •)
例子:
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
Est*_*cas 13
您可以使用不带任何服务器端代码的JavaScript,根据需要创建这些图像,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).
Google google.maps.Marker接受Base64作为其图标属性.有了这个,我们可以从SVG创建一个有效的Base64.
您可以在此Plunker中看到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,这样我就可以根据需要调整图像大小,之后我使用canvas'toDataURL方法获得Base64.
所有这些演示都基于我的同事@thiago-mata的代码.感谢他.
最新的google js API有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'}
});
刚刚找到这个教程:http://biostall.com/adding-number-or-letters-to-google-maps-api-markers
它看起来不是最好的解决方案,但确实有效.
您可以在标记上使用标签,这是一个关于GIcon.label的教程.
您也可以使用GMarker.openInfoWindow.
提示:这是我发现的关于google maps api 的最佳教程(当然在官方文档之后)
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
});
请参阅https://developers.google.com/maps/documentation/javascript/examples/marker-labels
有关标记布局的更多控制，请参阅Valery Viktorovsky 的答案
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