Delineate Anything v2 is a geospatial foundation model for large-scale agricultural field boundary mapping. The authors introduce FBIS-73M, a multi-resolution dataset containing 73 million instances across 61 countries, plus a resolution-specific curation pipeline for merged parcels and weak physical boundaries. On a manually curated benchmark spanning 100 countries, the paper reports a 0.284 mAP@0.5 improvement over the existing state of the art, described as a 103.3% relative gain. The authors also report mapping Ukraine’s 603,000 km² nationwide in 5.4 hours on a consumer-grade workstation. Code, weights, data, and vector products are stated to be public.
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