Li Zhang

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Other people with similar names: Li Zhang (AWS), Li Zhang (Birmingham), Li Zhang (Google), Li Zhang (IBM-china), Li Zhang (Nankai), Li Zhang (Newcastle, UK), Li Zhang (State Key Laboratory of Networking and Switching Technology, Beijing University of Posts and Telecommunications), Li Zhang (Teesside University), Li Zhang (China Telecom Research Institute), Li Zhang (UC San Diego), Li Zhang (UK), Li Zhang (University of Pennsylvania), Li Zhang (Wuhan)


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2021

pdf bib
Multi-Level Gazetteer-Free Geocoding
Sayali Kulkarni | Shailee Jain | Mohammad Javad Hosseini | Jason Baldridge | Eugene Ie | Li Zhang
Proceedings of Second International Combined Workshop on Spatial Language Understanding and Grounded Communication for Robotics

We present a multi-level geocoding model (MLG) that learns to associate texts to geographic coordinates. The Earth’s surface is represented using space-filling curves that decompose the sphere into a hierarchical grid. MLG balances classification granularity and accuracy by combining losses across multiple levels and jointly predicting cells at different levels simultaneously. It obtains large gains without any gazetteer metadata, demonstrating that it can effectively learn the connection between text spans and coordinates—and thus makes it a gazetteer-free geocoder. Furthermore, MLG obtains state-of-the-art results for toponym resolution on three English datasets without any dataset-specific tuning.