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JUST engine

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JD Cloud Developers
JD Cloud Developers
Feb 24, 2021 · Big Data

How JD’s JUST Engine Enables Real‑Time Urban Crowd Monitoring

Following the tragic 2014 Shanghai Bund crowd incident, JD Urban developed the JUST spatio‑temporal data engine, which integrates diverse real‑time sources—mobile signaling, video, traffic, trajectories, weather, POI and event data—into six unified models, applies advanced indexing and AI forecasting to monitor and predict crowd flows, enabling rapid safety interventions.

AI forecastingJUST enginebig data
0 likes · 14 min read
How JD’s JUST Engine Enables Real‑Time Urban Crowd Monitoring
JD Tech Talk
JD Tech Talk
Nov 17, 2020 · Databases

JUST Engine: Novel Spatio‑Temporal Indexes and Data Models for Large‑Scale Urban Data Management

The article introduces the JUST engine, a spatio‑temporal data platform that extends GeoMesa with three new indexes (Z2T, XZ2T, time_range), defines nine common and three specialized data models, provides default indexing strategies, and offers detailed SQL usage guidelines for efficient querying of massive urban datasets.

DatabasesGeoMesaJUST engine
0 likes · 25 min read
JUST Engine: Novel Spatio‑Temporal Indexes and Data Models for Large‑Scale Urban Data Management