GeoX: Mastering Geospatial Reasoning Through Self-Play and Verifiable Rewards

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Main Authors: Ahn, Kyeongjin, Lee, Seungeon, Gummadi, Krishna P., Cha, Meeyoung
Format: Preprint
Published: 2026
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author Ahn, Kyeongjin
Lee, Seungeon
Gummadi, Krishna P.
Cha, Meeyoung
author_facet Ahn, Kyeongjin
Lee, Seungeon
Gummadi, Krishna P.
Cha, Meeyoung
contents Geospatial reasoning requires solving image-grounded problems over the complex spatial structure of a scene. However, developing this capability is hindered by the cost of annotating a vast and combinatorial question space. We propose GeoX, a self-play framework that acquires spatial logic through executable programs that yield verifiable rewards, without relying on large-scale human-curated data Given a satellite or aerial image, our framework employs a single multimodal policy that proposes spatial problems as executable programs and solves them under three reasoning modes-abduction, deduction, and induction-over spatial primitives and an image understanding tool. A verifier executes each program to covert a reward signal that jointly optimizes the two roles via reinforcement learning. GeoX consistently improves its base VLMs by up to 5.5 points on average, matching or exceeding conventional baselines trained on millions of curated data. Along-side the proposed method, we release a benchmark for geospatial understanding accumulated through self-play.
format Preprint
id arxiv_https___arxiv_org_abs_2605_20006
institution arXiv
publishDate 2026
record_format arxiv
spellingShingle GeoX: Mastering Geospatial Reasoning Through Self-Play and Verifiable Rewards
Ahn, Kyeongjin
Lee, Seungeon
Gummadi, Krishna P.
Cha, Meeyoung
Artificial Intelligence
Geospatial reasoning requires solving image-grounded problems over the complex spatial structure of a scene. However, developing this capability is hindered by the cost of annotating a vast and combinatorial question space. We propose GeoX, a self-play framework that acquires spatial logic through executable programs that yield verifiable rewards, without relying on large-scale human-curated data Given a satellite or aerial image, our framework employs a single multimodal policy that proposes spatial problems as executable programs and solves them under three reasoning modes-abduction, deduction, and induction-over spatial primitives and an image understanding tool. A verifier executes each program to covert a reward signal that jointly optimizes the two roles via reinforcement learning. GeoX consistently improves its base VLMs by up to 5.5 points on average, matching or exceeding conventional baselines trained on millions of curated data. Along-side the proposed method, we release a benchmark for geospatial understanding accumulated through self-play.
title GeoX: Mastering Geospatial Reasoning Through Self-Play and Verifiable Rewards
topic Artificial Intelligence
url https://arxiv.org/abs/2605.20006