TagHistory

TagHistory is a tool letting you plot graphs showing tag usage stats over time.

taghistory.raifer.tech

You can compare multiple tags, and so use it to observe a shift in usage over time from one tag to another

A TagHistory graph showing the growth in leisure=swimming_pool mapping and the decline in use of the older tag amenity=swimming_pool

Martin Raifer's diary entry gives more details

Math1985' diary entry gives more example tag comparisons (and their histories)

API

It has an API! See TagHistory API docs

Development

Developed by Martin Raifer.

Source code and bug tracking on github: https://github.com/tyrasd/taghistory