如何根据缩放级别加载图层? [英] How to load layers depending on zoom level?

问题描述

我想控制OpenLayers的缩放.

I want to control the zoom in OpenLayers.

当缩放为3时，我要加载KML1；当缩放为4时，我要加载KML2.

When the zoom is 3 I want to load KML1 and when the zoom is 4 i want to load KML2.

您能告诉我如何控制缩放事件吗?

Could you please advise me how I can control the zoom-event?

推荐答案

一种实现此目的的方法是使用类似

a way to accomplish that is to register an event on event "zoomend" on your map with something like

map.events.register(type, obj, listener);

您可以在此处找到更多信息: http://dev.openlayers.org/releases/OpenLayers-2.11/doc/apidocs/files/OpenLayers/Map-js.html

You can find more info there: http://dev.openlayers.org/releases/OpenLayers-2.11/doc/apidocs/files/OpenLayers/Map-js.html

也许您还应该同时加载两个kml，然后根据缩放级别隐藏/显示正确的图层.

Maybe you should also load both of your kml and then hide / show the correct layer depend on the zoom level.

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