Amap Tech

Jun 25, 2026 · Artificial Intelligence

ReaGeo: The First End‑to‑End LLM Geocoding Framework Linking Precise Mapping and Spatial Correlation

ReaGeo, a novel end‑to‑end geocoding system built on the Qwen2.5‑3B large language model, converts address text directly into Geohash sequences using chain‑of‑thought reasoning and GRPO reinforcement learning, achieving an average error of 119.6 m and 97.2 % accuracy within 500 m on Beijing data, surpassing commercial APIs and academic baselines while also modeling broader spatial correlation for line‑ and area‑type queries.