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

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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] view plaincopy

<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="init();">
<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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