TerraScope：基于像素的视觉推理用于地球观测
TerraScope: Pixel-Grounded Visual Reasoning for Earth Observation
AI总结：
TerraScope通过模态灵活推理和多时序推理，提升地球观测中像素级空间推理能力，提出Terra-CoT数据集和TerraScope-Bench基准，验证其在像素级地理空间推理中的优越性。
摘要：
TerraScope通过模态灵活推理和多时序推理，提升地球观测中像素级空间推理能力，提出Terra-CoT数据集和TerraScope-Bench基准，验证其在像素级地理空间推理中的优越性。
英文摘要：
Vision-language models (VLMs) have shown promise in earth observation (EO), yet they struggle with tasks that require grounding complex spatial reasoning in precise pixel-level visual representations. To address this problem, we introduce TerraScope, a unified VLM that delivers pixel-grounded geospatial reasoning with two key capabilities: (1) modality-flexible reasoning: it handles single-modality inputs (optical or SAR) and adaptively fuses different modalities into the reasoning process when both are available; (2) multi-temporal reasoning: it integrates temporal sequences for change analysis across multiple time points. In addition, we curate Terra-CoT, a large-scale dataset containing 1 million samples with pixel-level masks embedded in reasoning chains across multiple sources. We also propose TerraScope-Bench, the first benchmark for pixel-grounded geospatial reasoning with six sub-tasks that evaluates both answer accuracy and mask quality to ensure authentic pixel-grounded reasoning. Experiments show that TerraScope significantly outperforms existing VLMs on pixel-grounded geospatial reasoning while providing interpretable visual evidence.
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