Altair: text position and repel on map

Created on 15 Oct 2019 · 11Comments · Source: altair-viz/altair

Hi,

Thanks for developing Altair! Finally a great tool for visualization using the grammar of graphics in python! I am really having a lot of fun with it!

I am visualizing a map using mark_geoshape. I am adding points to the map using mark_point, and corresponding labeling text using mark_text. I have two issues:

The text is not always close to the corresponding point. I use x = "longitude:Q", y = "latitude:Q" both in mark_point and mark_text. As an example, see the distance between the green dot and the green text in the figure attached;
Texts often overlap - see the pink and brown texts in the figure attached. Is there any function similar to ggrepel in ggplot?

Thank you very much again for such a great tool!
Serena

example

enhancement vega-lite-related

Source

sbonaretti

👍1

Most helpful comment

It has been implemented and we are in the process of releasing the feature in Vega. The code is already in master at https://github.com/vega/vega/tree/master/packages/vega-label. Once we have support in Vega, we can support it in Vega-Lite as well. I can't promise a release date yet but it's coming. Thanks for your patience. It's a big feature to add with a lot of moving parts.

domoritz on 22 Apr 2020

🎉9

All 11 comments

No, I'm not aware of any functionality to automatically prevent text overlap. It would be worth a feature request in Vega-Lite.

jakevdp on 15 Oct 2019

@domoritz I think in theory this would be addressed by https://github.com/vega/vega-label, right? Are there plans to just integrate that work into the core vega story?