{"url":"/dataset/25ktrees","name":"25kTrees","full_name":"Individual Tree Crown Annotations","description_markdown":"Manual crown delineation of individual trees in two countries: Denmark and Finland.\r\n\r\n\r\n---------- Denmark data---------- :\r\n\r\n\r\n* More than 20k individual trees growing in different landscapes. \r\n\r\n\r\n* Annotation masks are paired with aerial photographs with a spatial resolution of 20cm. \r\n\r\n\r\n* Images contain RGB and near-infrared bands and were taken in summer 2018. \r\n\r\n\r\n* Image credits: Danish Agency for Data Supply and Infrastructure (https://sdfi.dk/)\r\n\r\n\r\n---------- Finland data---------:\r\n\r\n\r\n* More than 4k individual tree crowns in random sampling regions\r\n\r\n\r\n* Annotation masks are paired with aerial photographs containing near-infrared, green, and blue bands with a spatial resolution of 50cm \r\n\r\n\r\n* Image credits: National Survey of Finland (https://www.maanmittauslaitos.fi/en/maps-and-spatial-data)\r\n\r\n\r\nTasks:\r\n\r\n\r\n* Segmentation of individual tree crowns\r\n\r\n\r\n* Transfer learning/domain adaptation between datasets with different visual semantics, band compositions, forest species, etc.\r\n\r\nPaper: https://doi.org/10.1093/pnasnexus/pgad076","description_withheld":null,"homepage":"https://github.com/sizhuoli/TreeCountSegHeight","introduced_date":"2023-04-17","introduced_date_note":null,"introduced_by":null,"license":{"name":"Open, requiring citation","url":null},"modalities":[{"name":"Images","url":"/datasets/modality/images"}],"tasks":[{"name":"Semantic Segmentation","url":"/task/semantic-segmentation","datasets_with_task":"/datasets/task/semantic-segmentation"},{"name":"Object Counting","url":"/task/object-counting","datasets_with_task":"/datasets/task/object-counting"},{"name":"Segmentation","url":"/task/segmentation","datasets_with_task":"/datasets/task/segmentation"}],"languages":[{"name":"English","url":"/datasets/language/english"}],"variants":["25kTrees"],"data_loaders":[],"num_papers_in_archive":5,"source":{"archive":"pwc-archive (Hugging Face), CC BY-SA 4.0","snapshot":"2025-07-28"},"benchmarks":[],"papers_with_a_benchmark_row":[],"syntology_totals":{"read_at":"2026-09-24T18:15:14+00:00","papers_with_samples":0,"samples_harvested":0,"samples_ran":0,"samples_unverified":0,"pointer_only_for_licence":0,"papers_with_no_sample_that_ran":0,"note":"the per-paper counts above, summed; not a rate"},"papers_note":"The archive never published its papers-using-dataset list; these are papers with a leaderboard row on this dataset's benchmarks."}