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## General Questions
## Issue Type
- [ ] I have a question to ask about *how to use ECharts to ...*；我想提问如何使用 ECharts 实现某功能
- [x] I have a bug to report；我想要报 bug
- [ ] I…
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### Version
5.0.2
### Steps to reproduce
echarts4 鼠标悬浮到 折线上，无特效
https://echarts.apache.org/v4/examples/zh/editor.html?c=line-stack
echarts5 鼠标悬浮到 折线上，会默认强制触发 emphasis
https://echarts.apa…
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Hi John,
I love your work! Thank you. A lot. The libraries you've put together are fantastic. I've also started reading your recent book. I hope to create a widget for RoughViz.js -- a first effort…
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### One-line summary [问题简述]
### Version & Environment [版本及环境]
+ ECharts version [ECharts 版本]: 4。0
+ Browser version [浏览器类型和版本]: c
+ OS Version [操作系统类型和版本]: Win10
### Exp…
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### One-line summary [问题简述]
我想通过经纬度转换为对应的平面坐标，然后在地图上画饼图，请问echarts能提供一个对应的转换方法吗，或者有没有其它解决办法
### Version & Environment [版本及环境]
+ ECharts version [ECharts 版本]:
+ Browser version [浏览器类型和…
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### What problem does this feature solve?
我有一个项目的效果需要空心圆点样式，echarts4雷达图默认为空心原点，echarts5默认样式改变，type设置为emptyCircle都不可以实现。建议开设emptyCircle类型，像折线图一样可以给用户自己设置节点样式。
echarts5
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linux系统的火狐浏览器地图散点出现多余的竖线
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### Version
4.2.1
### Reproduction link
[https://gallery.echartsjs.com/editor.html?c=xXi4htj92D&v=1](https://gallery.echartsjs.com/editor.html?c=xXi4htj92D&v=1)
### Steps to reproduce
有问题的：ht…