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一步步DIY: OSM-Web服务器(三) OpenLays 与 SlippyMap

2012-09-07 16:32 507 查看
(-:<转载时请注明本文由goldenhawking在 CSDN blog 撰写 http://blog.csdn.net/goldenhawking/article/details/7955441
上一步，我们已经有了自己的地图瓦片服务器，现在，开始实现SlippyMap啦！

<1>下载释放OpenLayers到 www文件夹

SlippyMap 利用 OpenLays 的AJax实现，直接从Openlays官网下载最新版文件
http://www.openlayers.org/
这里是2.12 版本。
http://www.openlayers.org/download/OpenLayers-2.12.tar.gz
释放到 /var/www/openlayes下，并为www-data 设置可读权限，就完成了！

<2>下载OpenStreetMap.js

对OSM的数据，下载这个文件，放在上面第一步创建的文件夹里。

http://www.openstreetmap.org/openlayers/OpenStreetMap.js

于是，目录看起来如下：



接着，我们来写网页

<2> 编写第一个网页，实现SlippyMap

我们编写第一个网页, 参考图书 OpenLayers 2.10 Beginner's Guide，该图书在 http://download.csdn.net/detail/zyk0511/3473416
代码 

<html>
<head>
    <title>OSM Local Tiles</title>
    <link rel="stylesheet" href="/openlayers/theme/default/style.css" type="text/css" />
    <!-- bring in the OpenLayers javascript library
         (here we bring it from the remote site, but you could
         easily serve up this javascript yourself) -->

    <script src="/openlayers/OpenLayers.js"></script>

    <!-- bring in the OpenStreetMap OpenLayers layers.
         Using this hosted file will make sure we are kept up
         to date with any necessary changes -->

    <script src="/openlayers/OpenStreetMap.js"></script>

    <script type="text/javascript">
// Start position for the map (hardcoded here for simplicity)
        var lat=31.27386;
        var lon=121.48132;
        var zoom=7;
 
        var map; //complex object of type OpenLayers.Map
 
        //Initialise the 'map' object
        function init() {
 
            map = new OpenLayers.Map ("map", {
                controls:[
                     new OpenLayers.Control.Navigation(),
                    new OpenLayers.Control.PanZoomBar(),
                    //new OpenLayers.Control.PanZoom(),
                    new OpenLayers.Control.Permalink(),
                    new OpenLayers.Control.ScaleLine({geodesic: true}),
                    new OpenLayers.Control.Permalink('permalink'),
                    new OpenLayers.Control.KeyboardDefaults(),
                    new OpenLayers.Control.NavToolbar(),
                     new OpenLayers.Control.Attribution()],
                maxExtent: new OpenLayers.Bounds(-20037508.34,-20037508.34,20037508.34,20037508.34),
                maxResolution: 156543.0339,
                numZoomLevels: 19,
                units: 'm',
                projection: new OpenLayers.Projection("EPSG:900913"),
                displayProjection: new OpenLayers.Projection("EPSG:4326")
            } );
 
            // This is the layer that uses the locally stored tiles
            var newLayer = new OpenLayers.Layer.OSM("Local Tiles", "/osm_tiles2/${z}/${x}/${y}.png", {numZoomLevels: 19, transitionEffect: "resize"});
            map.addLayer(newLayer);

            var switcherControl = new OpenLayers.Control.LayerSwitcher();
            map.addControl(switcherControl);
            var vector_layer = new OpenLayers.Layer.Vector('Editable Vectors');
            map.addControl(new OpenLayers.Control.EditingToolbar(vector_layer));
            map.addLayer(vector_layer);

            map.addControl(new OpenLayers.Control.Graticule({visible: false}));
            var mousepos = new OpenLayers.Control.MousePosition({div: document.getElementById('mousepos_div')});
            map.addControl(mousepos);
            //mousepos.moveTo(new OpenLayers.Pixel(64,0));
            
            map.addControl(new OpenLayers.Control.OverviewMap());
             /*
            var navigationT =    new OpenLayers.Control.TouchNavigation({
                dragPanOptions:{
                    enableKinetic: true
                }
            });
            map.addControl(navigationT);
            */
            if( ! map.getCenter() ){
                var lonLat = new OpenLayers.LonLat(lon, lat).transform(new OpenLayers.Projection("EPSG:4326"), map.getProjectionObject());
                map.setCenter (lonLat, zoom);
            }
        }
 
    </script>

</head>
<!-- body.onload is called once the page is loaded (call the 'init' function) -->
<body onload="init();">
    <!-- define a DIV into which the map will appear. Make it take up the whole window -->
    <div style="width: 100%; height: 93%" id="map">
    </div>
    <P><a href='/index.html'>start screen</a></P>
    <div style="width: 100%; height: 5%" id="mousepos_div">
    
    
    
    </div>
</body>
</html>


访问网页，OK拉



下一篇，我们来导入全球的数据，并进行地名翻译。
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