Emerging Flexible Designs for Geospatial Multimodal Foundation Models

• URL: http://arxiv.org/abs/2606.12595v1
• Date: Wed, 10 Jun 2026 18:46:10 GMT
• Title: Emerging Flexible Designs for Geospatial Multimodal Foundation Models
• Abstract summary: We present an apples-to-apples comparison of leading FM architectures designed for geospatial multimodal reasoning.<n>Our results offer new insights into the design trade-offs between model flexibility, modality alignment, and downstream task performance.
• Score: 3.8796946939616093
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Foundation models are rapidly transforming Earth observation by enabling scalable pretraining across diverse unlabeled geospatial modalities. However, their architectural diversity ranging from encoder-only to encoder-decoder and masked autoencoding paradigms makes it challenging to assess performance trade offs in a consistent manner. In this work, we present an apples-to-apples comparison of leading FM architectures designed for geospatial multimodal reasoning, with a particular focus on flexibility across varied spectral band configurations. We standardize pretraining using identical self supervised learning objectives and training datasets, and evaluate all models under consistent parameterization on the GEOBench benchmark across classification and segmentation tasks. Our results offer new insights into the design trade-offs between model flexibility, modality alignment, and downstream task performance. By highlighting architectural strengths and limitations under controlled conditions, this study provides practical guidance for building next generation geospatial foundation models capable of robust multimodal reasoning.

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