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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.
Ive had a similar problem to you, but I have mostly solved it by using the Outrun app (which is free and open source), and going into the settings and turning up the GPS smoothing. I mostly run in central london, and it seems to work with the tall buildings here.
https://github.com/timfraedrich/OutRun
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