AUTHOR=Stock Andy TITLE=Choosing blocks for spatial cross-validation: lessons from a marine remote sensing case study JOURNAL=Frontiers in Remote Sensing VOLUME=6 YEAR=2025 URL=https://www.frontiersin.org/journals/remote-sensing/articles/10.3389/frsen.2025.1531097 DOI=10.3389/frsen.2025.1531097 ISSN=2673-6187