Heatmap scalability
还没有人认领这个 Issue。
评估
- 难度
- 5/5
- 预计耗时
- 一周以上
- 新手友好度
- 25/100
- Issue 类型
- 功能
- 描述清晰度
- 需要澄清
- 活跃度
- 停滞
- 技术栈
- javascript
调研方向
首先定位 heatmap 插件的压缩 JavaScript 及其 _redraw 路径，然后检查已报告的 rbush proof of concept 以及围绕 Leaflet.heat 的维护问题。完成的要求是确定一个经过同意的插件维护范围，并证明 heatmap 在渲染数百万个点时性能更好。
由索引模型根据 Issue 内容生成。
描述
The heatmap plugin is not very scalable at the moment. For millions few data points, the map is "laggy" when moving the maps around (at a reasonable zoom level, when most of the data points are hidden).
From what I've investigated, it comes from the fact the, when the _redraw function is called, the code iterates over all data points to check if it is or not in the bounds of the map being shown.
It seems very inefficient since there exists data structure such as R-Tree that can efficiently retrieve the data points inside a box.
Now it seems that the Leaftlet.heat plugin is not maintained anymore (as noted in #1282 ). As far as I can tell, there is only the .min.js file on this repository, what are the plans for this plugin?
Host it completely on this organization so it can be modified and maintained?
For the problem of the performances, I wrote a quick POC using rbush and it improves the performance when we zoom on a specific area (and fewer points are actually shown on the map). I can contribute to this issue if necessary.
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- Python
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