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InfluxDB
Power Real-Time Data Analytics at Scale. Get real-time insights from all types of time series data with InfluxDB. Ingest, query, and analyze billions of data points in real-time with unbounded cardinality.
Sadly this site doesn't seem to be maintained still, there's lots of contributions that aren't getting merged. https://github.com/mapnificent/mapnificent_cities
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