task_categories:visual-question-answering task_categories:image-text-to-text task_categories:multiple-choice language:en size_categories:100K<n<1M format:imagefolder modality:image modality:text modality:geospatial library:datasets library:mlcroissant arxiv:2604.20623 region:us remote-sensing geospatial image text multimodal change-detection semantic-change-captioning visual-question-answering