Spatial Language Representation with Multi-Level Geocoding

• URL: http://arxiv.org/abs/2008.09236v1
• Date: Fri, 21 Aug 2020 00:05:08 GMT
• Title: Spatial Language Representation with Multi-Level Geocoding
• Authors: Sayali Kulkarni, Shailee Jain, Mohammad Javad Hosseini, Jason Baldridge, Eugene Ie, Li Zhang
• Abstract summary: We present a multi-level geocoding model (MLG) that learns to associate texts to geographic locations. We show that MLG obtains state-of-the-art results for toponym resolution on three English datasets.
• Score: 15.376256625525391
• License: http://creativecommons.org/licenses/by-nc-sa/4.0/
• Abstract: We present a multi-level geocoding model (MLG) that learns to associate texts to geographic locations. The Earth's surface is represented using space-filling curves that decompose the sphere into a hierarchy of similarly sized, non-overlapping cells. MLG balances generalization and accuracy by combining losses across multiple levels and predicting cells at each level simultaneously. Without using any dataset-specific tuning, we show that MLG obtains state-of-the-art results for toponym resolution on three English datasets. Furthermore, it obtains large gains without any knowledge base metadata, demonstrating that it can effectively learn the connection between text spans and coordinates - and thus can be extended to toponymns not present in knowledge bases.

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