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Interactively visualize chronology relation on map #601

Open 1ec5 opened 1 year ago

1ec5 commented 1 year ago

When viewing a chronology relation in the inspector, the map should visualize the relation’s members interactively. Scrubbing your mouse over a member in the list of members should temporarily disable the orange highlights on the map, instead highlighting just the member’s geometry.

For example, this chronology relation of Alviso Park in San José, California, consists of multiple overlapping areas. By default, the areas drown out the base map, making it difficult to put the changes in context. Hovering over the link to this way, which represents the park’s most recent iteration, should filter the orange highlights to a geometry that excludes the library and youth center.

I’m deliberately ignoring the time slider here because the interaction model would be trickier. We should consider automatically adjusting or animating the time slider based on the chronology relation – or any other selected element – as part of #126.

1ec5 commented 1 year ago

On second thought, this could be useful for any kind of relation. A more general implementation might be appropriate upstream in openstreetmap/openstreetmap-website.