openlayers 扩展 图层对比控件

提供叠加的多个图层的对比查看

build

重要: Github 仓库的 /dist 文件夹只有在新版本发布时才会更新。如果想要使用 Github 上最新的源码，你需要自己构建。

git clone https://github.com/aurorafe/ol-control-CompareLayer.git
npm install
npm run dev
npm run build

Use

ol.control.CompareLayer(beforeMap, afterMap, options) or new olControlCompareLayer(beforeMap, afterMap, options)

CDN

https://unpkg.com/[email protected]/dist/ol-control-CompareLayer.min.js
https://unpkg.com/[email protected]/dist/ol-control-CompareLayer.js
https://unpkg.com/[email protected]/dist/ol-control-CompareLayer.css
https://unpkg.com/[email protected]/dist/ol-control-CompareLayer.min.css

NPM

npm install ol-control-comparelayer --save

import 'ol-control-comparelayer'
new ol.control.Loading(beforeMap, afterMap, options)

// or

import olControlCompareLayer from 'ol-control-loading'
new olControlCompareLayer(beforeMap, afterMap, options)

Examples

其他示例请参看example文件夹

Parameters:

| key | type | desc | | :--- | :--- | :---------- | | beforeMap | Object | 前置图层对象 | | afterMap | Object | 后置图层对象 | | params | Object | 相关控件配置 | | params['className'] | String | 控件类名，默认hmap-compare | | params['target'] | String | 目标dom | | params['initPosition'] | Number | 控件初始在视图位置距左边比例，默认0.5 |

Extends

ol.control.Control

Methods

setMap(map)

设置当前地图实例

Parameters:

| key | type | desc | | :--- | :--- | :---------- | | map | ol.Map | 地图实例 |

setBeforeLayet(beforeMap)

设置前置地图图层

Parameters:

| key | type | desc | | :--- | :--- | :---------- | | beforeMap | Object | 前置地图图层 |

setAfterLayer(afterMap)

设置后置地图图层

Parameters:

| key | type | desc | | :--- | :--- | :---------- | | afterMap | Object | 后置地图图层 |

orderLayerZindex()

调整前置图层和后置图层顺序，避免后置图层压盖前置图层