maplore: components that put mapgl maps in context

[JMTocho]

Hi Kyle and everyone,

I've been building on mapgl and wanted to share the result: maplore, an extension package with components that help readers understand what they are looking at as they pan and zoom.

• add_view_summary(): a live summary of the features in view (mean, median or total, highest and lowest, a histogram in the map's colors) compared with the whole map
• add_view_ranking(): the features in view with the highest or lowest values
• add_context_tooltip(): each value with its rank and its difference with the average
• add_feature_search(): a search box over the map's own data

Everything runs in the browser, so it works in static HTML and Quarto dashboards without Shiny. It works with both maplibre() and mapboxgl().

Website: https://jmtocho.github.io/maplore/
Repo: https://github.com/JMTocho/maplore

maplore relies on a few mapgl internals (el.map, x.layers). Is that OK, or would you suggest a more stable way to hook in?

Feedback is very welcome !