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KAFY: An Extensible and Scalable Transformers-Based System for Trajectory Data Analysis

Summary: KAFY unifies diverse trajectory-analysis tasks in a full-fledged, extensible system by treating trajectories as an “unspoken language” and transformers as reusable infrastructure. Its initial deployment combines three transformers and five operations, matching or surpassing specialized baselines. (summarized by gpt-5.6-luna on Aug 28 2026)

Paper ID
hca7bc68525c09600
Venue
VLDB
Year
2026
Pagerank
4.9793485e-05
Overall Rank
10,870 | 26.92%
DOI
10.14778/3836663.3836696

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Authors

BibTeX Citation

@article{hussein_vldb26,
        title = {{KAFY: An Extensible and Scalable Transformers-Based System for Trajectory Data Analysis}},
        author = {Hussein, Youssef and Mokbel, Mohamed F.},
        journal = {PVLDB},
        series = {{VLDB} '26},
        volume = {19},
        number = {11},
        pages = {3385--3399},
        doi = {10.14778/3836663.3836696},
        url = {https://doi.org/10.14778/3836663.3836696},
        year = {2026}
}

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Outgoing Citations (Sorted by Pagerank)

Showing 30 of 30 cited papers.

Citations counted here include only citations to other VLDB/SIGMOD/CIDR/PODS papers in this database.

Rank Cited Paper Year Venue Pagerank
2 R-Trees: A Dynamic Index Structure For Spatial Searching 1984 SIGMOD 0.001992968
917 Trajectory Clustering: A Partition-and-Group Framework 2007 SIGMOD 0.00013091246
1,177 On Map-Matching Vehicle Tracking Data 2005 VLDB 0.000116417
1,740 TranAD: Deep Transformer Networks for Anomaly Detection in Multivariate Time Series Data 2022 VLDB 9.7439205e-05
2,021 Distributed Trajectory Similarity Search 2017 VLDB 9.1719539e-05
2,196 DITA: Distributed In-Memory Trajectory Analytics 2018 SIGMOD 8.8780862e-05
2,501 Trajectory Simplification: On Minimizing the Direction-based Error 2015 VLDB 8.3808899e-05
2,608 TraClass: Trajectory Classification Using Hierarchical Region-Based and Trajectory-Based Clustering 2008 VLDB 8.2287717e-05
2,914 Direction-Preserving Trajectory Simplification 2013 VLDB 7.8619624e-05
2,971 Time Series Data Cleaning: From Anomaly Detection to Anomaly Repairing 2017 VLDB 7.7971821e-05
3,009 Trajectory Simplification: An Experimental Study and Quality Analysis 2018 VLDB 7.7578378e-05
3,161 Effective Travel Time Estimation: When Historical Trajectories over Road Networks Matter 2020 SIGMOD 7.5796549e-05
3,243 Efficient Processing of Window Queries in The Pyramid Data Structure 1990 PODS 7.4986756e-05
3,497 Anytime Stochastic Routing with Hybrid Learning 2020 VLDB 7.2556245e-05
3,761 MDTP: A Multi-source Deep Traffic Prediction Framework over Spatio-Temporal Trajectory Data 2021 VLDB 7.0421978e-05
3,770 Calibrating Trajectory Data for Similarity-based Analysis 2013 SIGMOD 7.0297827e-05
3,802 UlTraMan: A Unified Platform for Big Trajectory Data Management and Analytics 2018 VLDB 7.0132896e-05
4,070 SharkDB: An In-Memory Storage System for Massive Trajectory Data 2015 SIGMOD 6.8213576e-05
5,011 Fast Large-Scale Trajectory Clustering 2020 VLDB 6.3148258e-05
5,036 One-Pass Error Bounded Trajectory Simplification 2017 VLDB 6.3038212e-05
5,743 VRE: A Versatile, Robust, and Economical Trajectory Data System 2022 VLDB 6.0099017e-05
5,959 A Demonstration of ST-Hadoop: A MapReduce Framework for Big Spatio-temporal Data 2017 VLDB 5.933383e-05
6,097 Trajectory Similarity Join in Spatial Networks 2017 VLDB 5.887961e-05
6,730 Trajectory Similarity Measurement: An Efficiency Perspective 2024 VLDB 5.6939772e-05
7,651 Kamel: A Scalable BERT-based System for Trajectory Imputation 2024 VLDB 5.4772833e-05
8,693 QARTA: An ML-based System for Accurate Map Services 2021 VLDB 5.2905577e-05
10,150 RED: Effective Trajectory Representation Learning with Comprehensive Information 2025 VLDB 5.0715586e-05
10,152 TERI: An Effective Framework for Trajectory Recovery with Irregular Time Intervals 2024 VLDB 5.0715586e-05
10,972 A Demonstration of KAFY: An Extensible and Scalable Transformers-Based System for Trajectory Data Analysis 2026 VLDB 4.9793485e-05
11,423 Large Language Models for Spatial Analysis Queries 2025 VLDB 4.9793485e-05
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