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OpenLayers-地圖拒絕最大化縮放

[英]OpenLayers - Map refusing to zoom to max extent

如果圍繞某些OpenLayers代碼進行更改,則副作用是Google Street基本圖層不再顯示明智的地圖,而是縮小到3倍的世界視圖。 我在api建議的代碼中沒有做任何工作。

相同的代碼-但經過重新排列-過去可以正常使用(但不幸的是,它不允許更大的畫面起作用)

我是這方面的新手,並且超出了我的舒適范圍,因此對代碼的健全性檢查將不勝感激:

    function ProfileMap(mapName)
    {
        this.name = mapName;
        this.layers = [];

        // define Map options
        var mapoptions = {
                projection: mercator,
                units: "m",
                maxExtent: world
        };

        // define Base Layer
        var baselayer = new OpenLayers.Layer.Google(
                "Google Streets", 
                {numZoomLevels: 20, spehericalMercator: 2}
        );  


        this.init = function(mapdiv, keydiv)
        {
            var layerswitcher = new OpenLayers.Control.LayerSwitcher(
                    {div: document.getElementById(keydiv)}
            );      

            this.map = new OpenLayers.Map(mapdiv, mapoptions);
            this.map.addLayer(baselayer);
            this.map.setCenter(mapcenter);
            this.map.zoomToMaxExtent();

        };

        this.addMapLayer = function(layerName)
        {
            var layerid = this.layers.length;
            this.layers[layerid] = new OpenLayers.Layer.Markers(layerName);
            this.map.addLayer(this.layers[layerid]);
        }

    }


    // Map actually created by a call to this function
    function createMap(mapName, div, keydiv, mapLayers)
    {
        mapName = new ProfileMap(mapName);
        mapName.init(div, keydiv);
        for(var i=0; i < mapLayers.length; i++)
        {
            mapName.addMapLayer(mapLayers[i]);
        }

    }

可能一件事是您拼錯了sphericalMercator 此外,它接受布爾值,而不是數字。

sphericalMercator: true

參考

更新#1:

請更改此:

var mapoptions = {
    projection: mercator,
    units: "m",
    maxExtent: world
};

為了這:

var mapoptions = {
    projection: new OpenLayers.Projection("EPSG:900913"),
    units: "m",
    maxExtent: world
};

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