Tooltip examples

[leila071497]

Three tooltip ideas for enhancement

1. The Pleasant Places to Live

Chart type: binned map, stroke width data mapping, bar chart reference: https://kellegous.com/j/2014/02/03/pleasant-places/ by Kelly Norton.

2. Employment Rate

Chart type: Multi-Line Chart reference: https://observablehq.com/@d3/multi-line-chart by Mike Bostock

3. Boston Weather

Chart type: range chart(maximum and minimum temperature for a year in Boston), scatter plot(daily precipitation) reference: http://data-illustrator.com/example.php?v=bostonWeather / http://weather-radials.com/ by Timm Kekeritz of Raureif

[domoritz]

Example 2 should be pretty easy once we have https://github.com/vega/vega-lite/issues/6851.

In order to support the first one, we will need to improve Vega tooltip so let's move this issue there.

[domoritz]

Closing since we don't have any immediate actions here.