plotly / plotly/plotly.js

problems with mapbox density heatmap color

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描述

Upon reviewing the demonstration provided on https://plotly.com/javascript/mapbox-density-heatmaps, I have observed an issue with the coloring of the last heat map chart that displays earthquake magnitudes. When a user mouses out too much, the coloring appears to be incorrect. It is unclear whether this is intended behavior or a bug, but it does not appear logical to end users and seems like a bug.

For instance, if a user mouses out too far, numerous yellow areas are displayed, giving the impression that all of these areas have experienced 9-degree earthquakes. As a result, it appears as if nearly the entire earth has experienced a 9-degree earthquake, as shown in the image provided. However, when a user zooms in to examine specific locations, the yellow spots disappear, resulting in an absence of yellow spots. This behavior renders the chart significantly misleading to the end user.

I would like to inquire if you are aware of this issue. Is there a workaround or a setting that can be modified to prevent this from happening when a user mouses out too much?

image
Zoom out example

image
Zoom in example

image
Zoom in example

Same behavior has the previous chart as well, which is type of densitymapbox:

image
Zoom out example
image
Zoom in example
image
Zoom in example


However even if mouse in the colors are not right:

image
image
image

These 2 points above have very different values. One is 7 the other is 5.5. According to legend scale we should see different colors

image

But they are very similar and end user can not see the difference here.

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调研方向

从 Mapbox 的 density heatmap 演示开始,在放大和缩小时复现报告的行为。比较 density heatmap 和 densitymapbox 示例中地震震级的颜色,包括报告的值 7 和 5.5。完成标准是:可视化能够在不同缩放级别上一致地传达震级差异,或记录一个已确认的 workaround。

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评估

技术栈
javascript
领域
data-visualization
Issue 类型
缺陷
难度
4/5
预计耗时
3-5 天
活跃度
停滞
描述清晰度
需要澄清
新手友好度
32/100

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