WorldMap coloring makes countries invisible

[ghost]

@mwullink commented on Nov 1, 2016, 3:45 PM UTC:

Make sure these boxes are checked before submitting your issue - thank you!

• [*] I have checked the caravel logs for python stacktraces and included it here as text if any
• [*] I have reproduced the issue with at least the latest released version of caravel
• [*] I have checked the issue tracker for the same issue and I haven't found one similar

Caravel version

0.11.0

Expected results

World map with all the countries visible

Actual results

When 1 country has a high count value it gets a very dark color, the countries with a low count value are rendered white and they not visible anymore.

Steps to reproduce

Create set of countries with 1 country having a high count and the others with very low count. only the country with the high count and the countries without counts are visible.

This issue was moved by kristw from apache/incubator-superset#1497.

[ghost]

@Igosuki commented on Jan 26, 2017, 4:16 PM UTC:

Most likely there is a gradient multiplied by the value, if value is zero then it is white instead of light.
The calculation should use a base color as a threshold.

Update

const colorScale = d3.scale.linear()
    .domain([ext[0], ext[1]])
    .range(['#FFF', 'black']);

This is the code that creates the scale, which means that every zero value will be white on white background.
Most likely the person who tested this had non-zero values for every country, I think we should be able to override the default colorScale function and colors in the world map form, usage of another scale is depicted here https://bl.ocks.org/mbostock/3306362

[ghost]

@olbapito commented on Feb 26, 2018, 8:30 PM UTC:

This is still the behavior. Is there any workaround to alter the color scale?
Thanks!

[ghost]

@Tyler-Rex commented on Jun 19, 2018, 2:18 PM UTC:

I now have the issue of countries with a 0 being darker than countries with a 1. Using 0.25.0.

[ghost]

@vladnvo commented on Feb 27, 2019, 8:50 AM UTC:

The same issue

[ghost]

@huntg commented on Mar 14, 2019, 2:23 PM UTC:

Still seeing this issue

[manavbagai]

Still seeing this issue

[christophlingg]

I am experiencing the same issue. To illustrate the problem you can see an example with very high numbers in Germany. The color coding has multiple issues:

• countries with no data are darker than countries with low numbers
• borders of countries with low numbers are not visible

[Igosuki]

We just need to patch this

[christophlingg]

@Igosuki I created a PR, what is missing is trying it out locally, do you have experience in running superset-ui-plugins locally?

[stelios313]

I m having the same issue, is this solved in 0.35?