![]() National Individual Tree Species Atlas updates the previous Atlas of United States Trees with better spatial accuracy and finer spatial resolution and includes 264 species which are mapped to a more precise location. National Individual Tree Species Atlas Publication The ITSP rasters used in NIDRM models are available for download from the following GIS Data Downloads. ![]() Image services at a finer 30-meter pixel resolution area available in the ‘RDW_FHP_TreeSpeciesMetrics’ folder at the Server connection. The map services that drive the ITSB web map viewer are accessible from the Hosts folder at the ArcGIS Server connection. These data are available in View-Only mode from the ITSP web map viewer. Many other applications and analyses requiring tree-species density could benefit from this spatially refined dataset. ![]() The parameter products are based on 30-meter Landsat satellite data, climate, terrain, and soil predictor layers and ground samples from the USFS Forest Inventory and Analysis plot data. While similar to the Tree Atlas, the ITSP project mapped basal area and stand density index for each individual tree species. The various datasets disaggregated by age are available in two forms: by standard 5-year age groups and single ages.Īdditional outputs, including results from the probabilistic projections, and more detailed metadata will be posted soon after the initial public release.The Individual Tree Species Parameter Maps (ITSP) were developed to support the National Insect and Disease Risk Map (NIDRM) since insect and disease risk is often driven by the density of a given species. For the first time, the estimates and projections are presented in one-year intervals of age and time instead of the five-year intervals used previously. Special Aggregates also provide additional groupings of countries. For advanced users who need to use these data in a database form or statistical software, we recommend to use the CSV format for bulk download. An online database (Data Portal) provides access to a subset of key indicators and interactive data visualization, including an open API for programmatic access. The main results are presented in a series of Excel files displaying key demographic indicators for each UN development group, World Bank income group, geographic region, Sustainable Development Goals (SDGs) region, subregion and country or area for selected periods or dates within 1950-2100. This latest assessment considers the results of 1,758 national population censuses conducted between 19, as well as information from vital registration systems and from 2,890 nationally representative sample surveys The 2022 revision also presents population projections to the year 2100 that reflect a range of plausible outcomes at the global, regional and national levels. It presents population estimates from 1950 to the present for 237 countries or areas, underpinned by analyses of historical demographic trends. ![]() The 2022 Revision of World Population Prospects is the twenty-seventh edition of official United Nations population estimates and projections that have been prepared by the Population Division of the Department of Economic and Social Affairs of the United Nations Secretariat. ![]()
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