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Posted to dev@echarts.apache.org by GitBox <gi...@apache.org> on 2019/07/20 04:02:35 UTC
[GitHub] [incubator-echarts] luowengang commented on issue #3899: 世界地图的视图中心点可以定制吗
luowengang commented on issue #3899: 世界地图的视图中心点可以定制吗
URL: https://github.com/apache/incubator-echarts/issues/3899#issuecomment-513433554
非常感谢，提供该功能方法，请问，这个从echarts哪个版本开始，可以支持？
在 2019-06-10 23:04:04，"xiaopang" <no...@github.com> 写道：
将以非洲为中心的geojson改成以亚洲为中心的geojson，方法如下：
// 对纬度进行偏移
const processLng = lng => {
return lng > -30 ? lng - 150 : lng + 210
}
//引入世界地图
import worldMap from '../data/world.json'
const coordinatesList = []
// 对世界地图的json文件中的经纬度坐标进行处理
worldMap.features.map(district => {
if (district.geometry.type == 'Polygon') {
district.geometry.coordinates.map(border => {
border.map(coord => {
coord[0] = processLng(coord[0])
coordinatesList.push(coord)
})
})
} else {
district.geometry.coordinates.map(border => {
border.map(coordinates => {
coordinates.map(coord => {
coord[0] = processLng(coord[0])
coordinatesList.push(coord)
})
})
})
}
})
这样世界地图的效果变成了期望的效果：
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