OpenLayers_2.10_Beginners_Guide_Code
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《OpenLayers 2.10 初学者指南代码》是一份专为刚接触OpenLayers的开发者准备的资源,其中包含了丰富的实例代码,旨在帮助初学者快速掌握OpenLayers库的使用。OpenLayers是一个开源的JavaScript库,它使得在网页上创建交互式地图变得更加简单。这个压缩包中的代码实例涵盖了OpenLayers的基础功能和常见应用,通过学习和实践这些代码,你可以深入理解OpenLayers的工作原理和API用法。 OpenLayers的核心功能包括: 1. 地图加载:OpenLayers支持多种地图服务,如WMS、WFS、TMS等。通过`OpenLayers.Map`类,你可以创建一个地图容器,并加载来自不同服务的地图层。例如,使用`addLayer`方法添加新的图层。 2. 图层管理:OpenLayers允许你添加、删除和控制图层的可见性。这包括对图层透明度的调整、图层叠加顺序的改变等。 3. 坐标系统:OpenLayers支持多种坐标系统之间的转换,如EPSG:4326(经纬度)和EPSG:900913(Google Mercator)。`OpenLayers.Projection`类用于定义和转换坐标系统。 4. 控件集成:OpenLayers提供了多种内置控件,如缩放条、导航控件、图层切换器等,可以通过`OpenLayers.Control`类创建并添加到地图中。 5. 地图交互:用户可以进行点击、拖拽等操作,OpenLayers提供了事件监听机制来响应这些交互。例如,你可以通过监听`click`事件来实现点击地图获取坐标的功能。 6. 矢量数据:OpenLayers支持动态绘制和编辑矢量图形,如点、线和多边形。`OpenLayers.Layer.Vector`类用于创建矢量图层,`OpenLayers.Geometry`类则提供了几何对象的构建。 7. WFS服务:OpenLayers可以与Web Feature Service (WFS)交互,用于读取和编辑地理空间数据。`OpenLayers.Protocol.WFS`类提供了与WFS服务器通信的接口。 8. KML和GeoRSS支持:OpenLayers可以解析KML和GeoRSS格式的数据,显示在地图上。 在压缩包中的代码实例,你可能会看到如何创建基本地图、添加图层、设置地图控件、处理地图事件、绘制和编辑矢量要素等内容。每个例子都对应了OpenLayers API的一个或多个功能点,是学习和理解OpenLayers的绝佳素材。通过深入研究这些代码,你可以逐步掌握OpenLayers的使用,为自己的WebGIS项目打下坚实基础。
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- morpheus7222016-03-04非常感谢,但不是我想要的,谢谢
- LaxLee2012-12-11很不错 对我很有帮助
- 迷失之境2015-09-07还不错,挺好,就是有点简单
- abcgis2015-11-01了解openlayer的不错资料
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