Gis 添加覆盖WMS时出错_Gis_Openlayers

Gis 添加覆盖WMS时出错

gis openlayers

Gis 添加覆盖WMS时出错,gis,openlayers,Gis,Openlayers,我是地理信息系统新手，正在编写openLayer教程以下是HTML代码： <html> <head> <meta charset="utf-8" /> <meta name="format-detection" content="telephone=no" /> <meta name="msapplication-tap-highlight" content="no" />

我是地理信息系统新手，正在编写openLayer教程

以下是HTML代码：

<html>
    <head>
        <meta charset="utf-8" />
        <meta name="format-detection" content="telephone=no" />
        <meta name="msapplication-tap-highlight" content="no" />
        <!-- WARNING: for iOS 7, remove the width=device-width and height=device-height attributes. See https://issues.apache.org/jira/browse/CB-4323 -->
        <meta name="viewport" content="user-scalable=no, initial-scale=1, maximum-scale=1, minimum-scale=1, width=device-width, height=device-height, target-densitydpi=device-dpi" />
        <link rel="stylesheet" type="text/css" href="css/index.css" />
        <title>Hello World</title>
    </head>
    <body>
        <div class="app">

            <div style="width:100%; height:100%" id="map"></div>
        </div>

        <script type="text/javascript" src="cordova.js"></script>
        <script type="text/javascript" src="js/index.js"></script>
        <script src="http://openlayers.org/api/OpenLayers.js"></script>
        <script type="text/javascript">
            app.initialize();
        </script>
    </body>
</html>

})

在浏览器中查看：

我得到这个错误：

http://www2.dmsolutions.ca/cgi-bin/mswms_gmap?LAYERS=bathymetry%2Cland_fn%2…EST=GetMap&STYLES=&SRS=EPSG%3A4326&BBOX=-180,-90,0,90&WIDTH=256&HEIGHT=256 Failed to load resource: net::ERR_NAME_NOT_RESOLVED

如果我从javascript中删除以下行：

var dm_wms = new OpenLayers.Layer.WMS(
                "Canadian Data",
                "http://www2.dmsolutions.ca/cgi-bin/mswms_gmap",
                {
                    layers: "bathymetry,land_fn,park,drain_fn,drainage," +
                            "prov_bound,fedlimit,rail,road,popplace",
                    transparent: "true",
                    format: "image/png"
                },
                { isBaseLayer: false }
            );

我在浏览器上看到这个视图：

你知道为什么我在覆盖一层时会出现上述错误吗？

服务器“”似乎已关闭，请尝试使用其他WMS，如

var dm_wms = new OpenLayers.Layer.WMS(
                "Canadian Data",
                "http://www2.dmsolutions.ca/cgi-bin/mswms_gmap",
                {
                    layers: "bathymetry,land_fn,park,drain_fn,drainage," +
                            "prov_bound,fedlimit,rail,road,popplace",
                    transparent: "true",
                    format: "image/png"
                },
                { isBaseLayer: false }
            );

var dm_wms = new OpenLayers.Layer.WMS(
            "OSM example",
            "http://129.206.228.72/cached/osm?",
            {
                layers: "osm_auto:all"
                transparent: "true",
                format: "image/png"
            },
            { isBaseLayer: false }
        );