Canopy height 250m - continental subsets

Description This dataset provides projected and aggregated canopy height rasters derived from the ETH Global Canopy Height 10 m (Lang et al. 2023) source tiles. The archive contains 12 GeoTIFF products covering six continental regions, five multi-region composite realms, and one global product. The continental rasters are provided at 250 m spatial resolution for Africa, Asia, Australia, Europe, North America, and South America. Additional 250 m products are provided for Indo-Pacific, Eurasia, New World, Old World, and Holarctic. A global product is provided at 500 m resolution. All canopy-height products in this archive were derived from the ETH Global Canopy Height 2020 dataset (https://langnico.github.io/globalcanopyheight/; https://www.research-collection.ethz.ch/entities/researchdata/2ecca65c-bc7b-4e72-9b62-534d606a062e). This is a global canopy top height map for the year 2020 at 10 m ground sampling distance estimated from Sentinel-2 imagery. The methodology combines Sentinel-2 with GEDI full-waveform LiDAR supervision in a probabilistic deep-learning framework to retrieve dense global canopy height estimates. Files included AFR_canopyheight_250m.tifASIA_canopyheight_250m.tifAUS_canopyheight_250m.tifEUR_canopyheight_250m.tifNAM_canopyheight_250m.tifSAM_canopyheight_250m.tifINDO_PACIFIC_canopyheight_250m.tifEURASIA_canopyheight_250m.tifNEW_WORLD_canopyheight_250m.tifOLD_WORLD_canopyheight_250m.tifHOLARCTIC_canopyheight_250m.tifWORLD_canopyheight_500m.tif Details The products distributed in this Zenodo record are derived rasters, not the original ETH 10 m source tiles. Source-tile download links were generated automatically from predefined continental extents, validated before download, and used to assemble continent-specific raster collections for subsequent aggregation and reprojection. The regional products were generated from ETH GlobalCanopyHeight 10 m (2020) source tiles obtained as continent-specific tile lists. Download links were generated automatically from predefined regional extents using a scripted naming scheme for the ETH tile files, then checked and filtered to retain only valid URLs before downloading missing tiles with retry logic and resumable transfers. For each continent, all downloaded GeoTIFF tiles were screened for existence, readability, and CRS consistency, then assembled into a single virtual raster mosaic (VRT). A densified footprint polygon was derived from the VRT extent and projected to a continent-specific equal-area CRS to build an output template that reduced clipping along curved projection edges. Each continental VRT was then projected and aggregated directly to a 250 m grid, written as a compressed tiled GeoTIFF, and checked with regional non-NA diagnostics and summary statistics. The larger realm-scale products were produced from the completed continental 250 m rasters rather than from the original 10 m tiles. For each composite product, the non-NA footprint of each contributing continent raster was first approximated, projected into a shared target equal-area CRS, and used to define a common output template at 250 m resolution. The continental rasters were then reprojected to that template with bilinear resampling, mosaicked into a single raster, and written as compressed GeoTIFF outputs. This approach was used for products such as New World, Indo-Pacific, Eurasia, Holarctic, and Old World. The global raster was generated in the same general way, but from all continental rasters together and written to a 500 m grid in a world-scale equal-area projection. The continental products use named projected coordinate reference systems: Africa Albers Equal Area Conic, Asia Lambert Conformal Conic, GDA94 / Australian Albers, ETRS89-extended / LAEA Europe, North America Albers Equal Area Conic, and South America Albers Equal Area Conic. The composite realm products use valid custom projected CRSs stored directly in the GeoTIFF metadata. These include custom Lambert Azimuthal Equal Area projections for Indo-Pacific, Eurasia, New World, Old World, and Holarctic, and a custom Mollweide projection for the global 500 m raster. Although some of these custom CRSs are not assigned a standard registry name by terra, the embedded projection definitions are present in the files and are suitable for reprojection and environmental data extraction workflows. Detailed file summary AFR_canopyheight_250m.tif: 33352 rows × 31645 cols × 1 layer; 250 × 250 m; Africa Albers Equal Area Conic.ASIA_canopyheight_250m.tif: 49560 rows × 83429 cols × 1 layer; 250 × 250 m; Asia Lambert Conformal Conic.AUS_canopyheight_250m.tif: 22539 rows × 33545 cols × 1 layer; 250 × 250 m; GDA94 / Australian Albers.EUR_canopyheight_250m.tif: 19760 rows × 26197 cols × 1 layer; 250 × 250 m; ETRS89-extended / LAEA Europe.NAM_canopyheight_250m.tif: 34345 rows × 53122 cols × 1 layer; 250 × 250 m; North America Albers Equal Area Conic.SAM_canopyheight_250m.tif: 33584 rows × 31174 cols × 1 layer; 250 × 250 m; South America Albers Equal Area Conic.INDO_PACIFIC_canopyheight_250m.tif: 56313 rows × 58907 cols × 1 layer; 250 × 250 m; custom Lambert Azimuthal Equal Area.EURASIA_canopyheight_250m.tif: 43394 rows × 65567 cols × 1 layer; 250 × 250 m; custom Lambert Azimuthal Equal Area.NEW_WORLD_canopyheight_250m.tif: 57542 rows × 50742 cols × 1 layer; 250 × 250 m; custom Lambert Azimuthal Equal Area.OLD_WORLD_canopyheight_250m.tif: 59419 rows × 75521 cols × 1 layer; 250 × 250 m; custom Lambert Azimuthal Equal Area.HOLARCTIC_canopyheight_250m.tif: 68461 rows × 73908 cols × 1 layer; 250 × 250 m; custom Lambert Azimuthal Equal Area.WORLD_canopyheight_500m.tif: 30264 rows × 70807 cols × 1 layer; 500 × 500 m; custom Mollweide. Reference Lang, N., Jetz, W., Schindler, K. et al. A high-resolution canopy height model of the Earth. Nat Ecol Evol 7, 1778–1789 (2023). https://doi.org/10.1038/s41559-023-02206-6