DisasterLex: An Expert Concept-to-Schema Knowledge Graph for Geospatial Reasoning in Disaster Analytics

In three linesDisasterLex is a knowledge-graph-mediated text-to-SQL framework for querying geospatial disaster-analytics databases. It uses an Expert Knowledge Graph (107 concepts, 117 causal edges) to route natural-language queries across 36 heterogeneous tables. On 75 test queries, it outperforms 4 baselines (LightRAG, HippoRAG 2, ReFoRCE, CHESS) by 1.4x to 2.75x.

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