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WorldWindKotlin
The WorldWind Kotlin SDK (WWK) includes the library, examples and tutorials for building multiplatform 3D virtual globe applications for Android, Web and Java.
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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.
Maybe this? https://github.com/msteiger/jxmapviewer2
It's not exactly what you're looking for but WorldWindKotlin is related to geospatial and mapping.
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Hence, a higher number means a more popular project.