ReferenceError：OpenLayers没有在openstreetmap中定义

你好，我试图实现一个标记到openstreetstreetmap，它显示萤火虫错误为ReferenceError: OpenLayers is not defined。这里是我已经实施的代码：ReferenceError：OpenLayers没有在openstreetmap中定义

<script> 
    map = new OpenLayers.Map("map", { 
     projection: "EPSG:900913", 
     displayProjection: "EPSG:4326" 
    }); 
    map.addLayer(new OpenLayers.Layer.OSM()); 
    var markers = new 
    OpenLayers.Layer.Text("text", {location: "<?php echo $root_url; ?>"+"/marker_a.png", projection: map.displayProjection}); 
    map.addLayer(markers); 
    map.zoomToMaxExtent(); 
</script> 
<body> 
    <iframe width="425" height="350" frameborder="0" scrolling="no" marginheight="0" marginwidth="0" src="http://www.openstreetmap.org/export/embed.html?bbox=77.4471,12.8607,77.7664,13.0728&layer=mapnik" style="border: 1px solid black"></iframe> 
    <br /> 
    <small> 
     <a href="http://www.openstreetmap.org/?lat=12.96675&lon=77.60675&zoom=14&layers=M">View Larger Map</a> 
    </small> 
</body>

在此先感谢。

来源

2014-09-23 Sudhir Koimattur

嗨我得到这一个我所使用的代码是在这里 – 2014-09-30 10:43:04

“图像=解 “” + “/marker_a.png”; var size = new OpenLayers.Size（21,25）; var offset = new OpenLayers.Pixel（ - （size.w/2），-size.h）; var icon1 = new OpenLayers.Icon（image，size，offset）; var lonLat1 = new OpenLayers.LonLat（res [2]，res [1]）。transform（ new OpenLayers.Projection（“EPSG：4326”），//从WGS 1984转换 map.getProjectionObject（）// to球面墨卡托投影）; var marker1 =新的OpenLayers.Marker（lonLat1，icon1）; var marker1 = new OpenLayers.Marker（lonLat1，icon1）; marker1.icon.size = size; marker1.icon.offset = offset; markers.addMarker（marker1，icon1）; – 2014-09-30 10:47:05

如果你已经设法解决你的问题，请张贴您的解决方案作为答案（这是积极的鼓励！）:) – kwah 2014-12-12 09:49:58

<script> 
image = "<?php echo $root_url; ?>" + "/marker_a.png"; 
var size = new OpenLayers.Size(21,25); 
var offset = new OpenLayers.Pixel(-(size.w/2), -size.h); 
var icon1 = new OpenLayers.Icon(image, size, offset); 
var lonLat1 = new OpenLayers.LonLat(res[2],res[1]).transform(new `OpenLayers.Projection("EPSG:4326"), 
map.getProjectionObject()); 
var marker1 = new OpenLayers.Marker(lonLat1, icon1); 
marker1.icon.size = size; 
marker1.icon.offset = offset; 
markers.addMarker(marker1, icon1); 
</script>

来源

2016-06-09 10:57:25

ReferenceError：OpenLayers没有在openstreetmap中定义

回答

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