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Flightradar24, originally a hobby project, became a popular real‑time flight‑tracking service by aggregating open data sources such as ADS‑B, MLAT, radar, satellite feeds and airline schedules, offering detailed aircraft information, 3D views, and supporting both enthusiasts and professionals worldwide.
This article provides a curated list of publicly available data query websites, simple universal datasets, large-scale collections, and specialized datasets for machine learning, image classification, text classification, and recommendation systems, offering valuable resources for AI research and data-driven projects.
The CCKS 2021 Resource Track invites submissions of open knowledge‑graph and semantic‑computing resources—including datasets, tools, ontologies, benchmarks, workflows, and crowdsourcing designs—by May 20, with detailed guidelines, evaluation criteria, and a best‑resource award announced at the August conference in Guangzhou.
TAL Education (好未来) has opened a 587‑hour bilingual Chinese‑English speech dataset from classroom teaching, one of the largest open educational corpora, aiming to fill the data scarcity in mixed‑language speech recognition research and support AI model development.
The OpenKG initiative, together with dozens of university and industry partners, has released a series of open‑source COVID‑19 knowledge graphs—including encyclopedia, research, clinical, hero, hotspot‑event, and upcoming prevention and resource graphs—detailing their data sources, scale, schema designs, and potential AI‑driven applications such as semantic search and intelligent question answering.
Didi launches Gaia Data Open Plan and Smart Signal Challenge to share anonymized trajectory and OD data, provide computing resources and funding, and invite researchers and algorithm enthusiasts to develop AI-driven traffic signal optimization, fostering academic collaboration and smart city mobility solutions.