Openlayers WMS图层一直空白,直到我放大

时间:2012-11-02 03:15:46

标签: asp.net-mvc-3 openlayers geoserver

我正在尝试将Openlayers与ASP MVC3集成,使用Geoserver作为学习过程但遇到了这个奇怪的问题。加载视图时,地图画布将显示为空白,并带有默认缩放控件。只有当我按下放大按钮时才会显示地图。我原本以为它与ASP的Razor View有关,所以我把它复制到一个单独的HTML文件但问题仍然存在。有什么建议吗?

<html>
<head>
<script type="text/javascript" src="http://openlayers.org/api/OpenLayers.js"></script>
<script type="text/javascript">

    function init() {
        var bounds = new OpenLayers.Bounds(
                    -124.848974, 45.543541,
                    -116.91558, 49.002494);
        var options = {
            maxExtent: bounds,
            maxResolution: 0.0309898203125,
            projection: "EPSG:4326",
            units: 'degrees'
        };
        var map = new OpenLayers.Map('map', options);
        var wms = new OpenLayers.Layer.WMS("Washington County Map", "http://localhost:8080/geoserver/tiger/wms",
            {
                layers: 'tiger:county10',
                format: 'image/png',
                visibility: true,
                isBaseLayer: true,
            });

        map.addLayer(wms);
        map.zoomToExtend(bounds);
    };
</script>
</head>
<body  onload="init()">
<h2>Test</h2>
<p>
    To learn more about ASP.NET MVC visit <a href="http://asp.net/mvc" title="ASP.NET MVC Website">http://asp.net/mvc</a>.
</p>

<div id="map" style="width:800px; height:500px;" />
</body>
</html>

1 个答案:

答案 0 :(得分:0)

您是否检查了缩放级别的Geoserver设置?您可以设置显示每个地图图层的最小和最大比例。