Software

GeoTessera Python library for accessing and working with Tessera geospatial foundation model embeddings. GeoTessera provides access to geospatial embeddings from the Tessera foundation model, which processes Sentinel-1 and Sentinel-2 satellite imagery to generate 128-channel representation maps at 10m resolution. These embeddings compress a full year of temporal-spectral features into dense representations optimized for downstream geospatial analysis tasks.
Interactive Tessera Embedding Classifier This repository contains a Jupyter notebook based tool for interactive, human-in-the-loop classification of geospatial data using the Tessera foundation model embeddings. The tool allows a user to define an area of interest, visualize the high-dimensional embedding data with PCA, and iteratively train a machine learning model by simply clicking on the map to label.

Papers

Please follow this link for papers in progress and under submission.

TESSERA overview presentation (PPTX) James Cook University, S. Keshav, September 29, 2025.
Self-supervised learning for earth observation, (PPTX) S. Keshav, Exeter, April 2025

Linked here.

Original Barlow Twin paper by Zbontar et al. (2021) for classical still images which inspired the development of a spectral-temporal representation learning (https://proceedings.mlr.press/v139/zbontar21a)
Master thesis (2022) with the first implementation of the Barlow Twins at Cambridge University (link)
First paper (2024) demonstrating that spectral-temporal representations from optical EO time series can be learned fully self-supervised using the Barlow Twins loss function - demonstration on crop type classification (https://ieeexplore.ieee.org/abstract/document/10592304)
First paper (2025) demonstrating the effectiveness of spectral-temporal representations for AGB monitoring in tropical countries (https://www.sciencedirect.com/science/article/pii/S0034425725001786)