TESSERA, a pixelwise geospatial foundation model

TESSERA is an open and pixel-wise foundation model for multi-modal (Sentinel-1/2) earth observation time series that learns robust, label-efficient embeddings.

Our goal with TESSERA is to make manipulating global satellite intelligence as easy as conventional programming tasks are. Towards this we release global, annual, 10m, pixel-wise embeddings together with open weights and code and lightweight adaptation heads. We also develop practical tooling for large-scale retrieval and inference at planetary scale.

As with any good foundation model, there are a staggering array of downstream tasks which can benefit. TESSERA embeddings deliver state-of-the-art accuracy with high label efficiency across diverse classification, segmentation, and regression tasks.

Activity

Summary of the "Nine Recommendations" and Biodiversity Monitoring Standards Framework papers from the US-UK Forum I attended in the summer of 2025, connecting them to my thoughts on collective knowledge systems and TESSERA.
Trip report from the Indian AI Impact Summit in New Delhi, covering the massive expo, a conversation with Yann LeCun, a hackathon/talk at IIT-Delhi, networking at the British High Commission, and reflections on the summit declaration's shift from safety to progress and equitable access.
First TESSERA hackathon held at the Indian AI Impact Summit in Delhi, exploring integration with IIT-Delhi's CoRE Stack for geospatial analysis and testing TESSERA labeling workflows.
Growing the Ceph cluster for TESSERA embeddings, a Lego brainstorming session for the Evidence TAP, hosting Echo Labs from ARIA, and Shane's IUCN Red List seminar.
Mark Elvers. The Tessera pipeline is written in Python. What would it take to have an OCaml version?
Andrew Gonzalez, Tom August et al. — Proceedings of the National Academy of Sciences