This EnviroAtlas dataset shows the Salt Lake City, UT EnviroAtlas community boundary. It represents the outside edge of all the block groups included in the EnviroAtlas Community. This dataset was produced by the US EPA to support research and online mapping activities related to EnviroAtlas. EnviroAtlas (https://www.epa.gov/enviroatlas) allows the user to interact with a web-based, easy-to-use, mapping application to view and analyze multiple ecosystem services for the contiguous United States. The dataset is available as downloadable data (https://edg.epa.gov/data/Public/ORD/EnviroAtlas) or as an EnviroAtlas map service. Additional descriptive information about each attribute in this dataset can be found in its associated EnviroAtlas Fact Sheet (https://www.epa.gov/enviroatlas/enviroatlas-fact-sheets).

This dataset represents the Flood Plain Management Services Study (FPMS) ares, 100-Year Flood for the Great Salt Lake. The area included Salt Lake City, Davis, Weber, tooele and box elder County The information was collected by digitzing the quad maps (Salt Lake, Tooele, boxelder county) and plate maps (weber and Davis county). The digital data contain the zone boundary and shoreline boundary. The FPMS study was limited to the general area along the Salt Lake County shoreline of the Great Salt Lake Only the 100-year flood elevation was evaluated and included wind and wave action for the Great Salt Lake. This dataset is the most current digital information available.

The TIGER/Line shapefiles and related database files (.dbf) are an extract of selected geographic and cartographic information from the U.S. Census Bureau's Master Address File / Topologically Integrated Geographic Encoding and Referencing (MAF/TIGER) Database (MTDB). The MTDB represents a seamless national file with no overlaps or gaps between parts, however, each TIGER/Line shapefile is designed to stand alone as an independent data set, or they can be combined to cover the entire nation. The All Roads Shapefile includes all features within the MTDB Super Class "Road/Path Features" distinguished where the MAF/TIGER Feature Classification Code (MTFCC) for the feature in MTDB that begins with "S". This includes all primary, secondary, local neighborhood, and rural roads, city streets, vehicular trails (4wd), ramps, service drives, alleys, parking lot roads, private roads for service vehicles (logging, oil fields, ranches, etc.), bike paths or trails, bridle/horse paths, walkways/pedestrian trails, stairways, and winter trails.

This EnviroAtlas dataset shows the approximate walking distance from a park entrance at any given location within the EnviroAtlas community boundary. The zones are estimated in 1/4 km intervals up to 1km then in 1km intervals up to 5km. Park entrances were included in this analysis if they were within 5km of the community boundary. This dataset was produced by the US EPA to support research and online mapping activities related to EnviroAtlas. EnviroAtlas (https://www.epa.gov/enviroatlas) allows the user to interact with a web-based, easy-to-use, mapping application to view and analyze multiple ecosystem services for the contiguous United States. The dataset is available as downloadable data (https://edg.epa.gov/data/Public/ORD/EnviroAtlas) or as an EnviroAtlas map service. Additional descriptive information about each attribute in this dataset can be found in its associated EnviroAtlas Fact Sheet (https://www.epa.gov/enviroatlas/enviroatlas-fact-sheets).

This EnviroAtlas dataset shows the block group population that is within and beyond an easy walking distance (500m) of a park entrance. Park entrances were included in this analysis if they were within 5km of the EnviroAtlas community boundary. This dataset was produced by the US EPA to support research and online mapping activities related to EnviroAtlas. EnviroAtlas (https://www.epa.gov/enviroatlas) allows the user to interact with a web-based, easy-to-use, mapping application to view and analyze multiple ecosystem services for the contiguous United States. The dataset is available as downloadable data (https://edg.epa.gov/data/Public/ORD/EnviroAtlas) or as an EnviroAtlas map service. Additional descriptive information about each attribute in this dataset can be found in its associated EnviroAtlas Fact Sheet (https://www.epa.gov/enviroatlas/enviroatlas-fact-sheets).

The Other Agency Boundaries feature service is a hosted feature service that covers the continental United States, Alaska, Hawaii and Puerto Rico. It is designed to be used for offline field use as a reference. The data is delivered through the Forest Service Enterprise Data Warehouse (EDW). Data is refreshed annually each May by the EDW and the Geospatial Technology and Applications Center (GTAC) in Salt Lake City. Data consists of Forest Service authoritative data, and authoritative data from other government agencies. In addition to filling mapping needs the map is designed to help support data management and national data efforts.

This EnviroAtlas data set shows the number of schools in each block group in the EnviroAtlas community boundary as well as the number of schools where less than 25% of the area within 100 meters of the school is classified as greenspace. In this community, green space is defined as Trees & Forest, Shrubs, Grass & Herbaceous, Woody Wetlands, and Emergent Wetlands. This dataset was produced by the US EPA to support research and online mapping activities related to EnviroAtlas. EnviroAtlas (https://www.epa.gov/enviroatlas) allows the user to interact with a web-based, easy-to-use, mapping application to view and analyze multiple ecosystem services for the contiguous United States. The dataset is available as downloadable data (https://edg.epa.gov/data/Public/ORD/EnviroAtlas) or as an EnviroAtlas map service. Additional descriptive information about each attribute in this dataset can be found in its associated EnviroAtlas Fact Sheet (https://www.epa.gov/enviroatlas/enviroatlas-fact-sheets).

The agency boundaries feature service is a hosted feature service that covers the continental United States, Alaska, Hawaii and Puerto Rico. It is designed to be used for offline field use as a reference. The data is delivered through the Forest Service Enterprise Data Warehouse (EDW). Data is refreshed annually each May by the EDW and the Geospatial Technology and Applications Center (GTAC) in Salt Lake City. Data consists of Forest Service authoritative data, and authoritative data from other government agencies. In addition to filling mapping needs the map is designed to help support data management and national data efforts.

This EnviroAtlas dataset addresses the tree buffer along heavily traveled roads. The roads are interstates, arterials, and collectors within the EnviroAtlas community boundary. In this community, tree cover is defined as Trees & Forest, and Woody Wetlands. Sufficient tree bufferage is defined as 25% coverage within the circular moving window with a radius of 14.5m at any given point along the roadway. There are potential negative health effects for those living in a location without a sufficient tree buffer. This dataset was produced by the US EPA to support research and online mapping activities related to EnviroAtlas. EnviroAtlas (https://www.epa.gov/enviroatlas) allows the user to interact with a web-based, easy-to-use, mapping application to view and analyze multiple ecosystem services for the contiguous United States. The dataset is available as downloadable data (https://edg.epa.gov/data/Public/ORD/EnviroAtlas) or as an EnviroAtlas map service. Additional descriptive information about each attribute in this dataset can be found in its associated EnviroAtlas Fact Sheet (https://www.epa.gov/enviroatlas/enviroatlas-fact-sheets).

This EnviroAtlas dataset shows the approximate walking distance from a park entrance at any given location within the EnviroAtlas community boundary. The zones are estimated in 1/4 km intervals up to 1km then in 1km intervals up to 5km. Park entrances were included in this analysis if they were within 5km of the community boundary. This dataset was produced by the US EPA to support research and online mapping activities related to EnviroAtlas. EnviroAtlas (https://www.epa.gov/enviroatlas) allows the user to interact with a web-based, easy-to-use, mapping application to view and analyze multiple ecosystem services for the contiguous United States. The dataset is available as downloadable data (https://edg.epa.gov/data/Public/ORD/EnviroAtlas) or as an EnviroAtlas map service. Additional descriptive information about each attribute in this dataset can be found in its associated EnviroAtlas Fact Sheet (https://www.epa.gov/enviroatlas/enviroatlas-fact-sheets).

This raster layer contains land cover change information, derived from LCMS (Land Change Monitoring System) for the Tongass National Forest to provide up-to-date and more complete information about vegetative communities, structure, and patterns across the Forest. The Central Tongass project area encompasses over 3.7 million acres that were mapped through a partnership between the Geospatial Office (GO), Tongass National Forest, and the Alaska Regional Office. The Tongass National Forest and their partners prepared the regional classification system, identified the desired map units (map classes) and provided general project guidance. GO provided project support and expertise in vegetation mapping.The modeling units (mapping polygons) were characterized with the following vegetation attributes: 1) map group, 2) vegetation type, 3) tree canopy cover percent, 4) tree canopy cover class, 5) tree size class, 6) change percent, 7) change year, 8) biomass for trees ≥ 2” dbh, 9) crown competition factor, 10) gross board feet (GBF) for trees ≥ 9” dbh, 11) quadratic mean diameter (QMD) for trees ≥ 2” dbh, 12) quadratic mean diameter for trees ≥ 9” dbh, 13) rumple index, 14) stand density index (SDI) for trees ≥ 9” dbh, 15) trees per acre (TPA) for trees ≥ 1’ tall, 16) trees per acre for trees ≥ 6” diameter at breast height (dbh), and 17) acres. The minimum map feature depicted on the map is 0.25 acres. This map product was generated using imagery primarily acquired between 2020 – 2024, reference information collected in the summers of 2023 – 2024, and LiDAR data flown in 2015. Every effort was taken to ensure consistency in the final products and these can be considered indicative of the existing vegetation conditions found within the project boundary during the growing season of 2024. All map products were designed according to National Forest Service vegetation mapping standards and are stored in federal databases. For more detailed information on mapping methodology please see the Central and Northern Tongass Vegetation Mapping Report:Central and Northern Tongass Vegetation Mapping Report (in progress): Dangerfield, C.; Bellante, G.; Foss, J.; Lund, A.; Caster, A.; Mohatt, K.; Homan, K.; Wittwer, D.; Johnson, T.; Goetz, W.; Moody, R.; Vernier, M.; Hemingway, B.; Achtenhagen, A.; Ryerson, D.; Megown, K.. 2025. Tongass National Forest Existing Vegetation Map. Salt Lake City, UT. In progress.

This raster layer trees per acre information for the Tongass project area, prepared for the Tongass National Forest to provide up-to-date and more complete information about vegetative communities, structure, and patterns across the Forest. Approximately 26 million acres, 18.2 million acres of which are terrestrial, including inland waterbodies and rivers, were mapped through a partnership between the Geospatial Office (GO), Tongass National Forest, and the Alaska Regional Office. The Tongass National Forest and their partners prepared the regional classification system, identified the desired map units (map classes) and provided general project guidance. GO provided project support and expertise in vegetation mapping.The modeling units (mapping polygons) were characterized with the following vegetation attributes: 1) map group, 2) vegetation type, 3) tree canopy cover percent, 4) tree canopy cover class, 5) tree size class, 6) change percent, 7) change year, 8) biomass for trees ≥ 2” dbh, 9) crown competition factor, 10) gross board feet (GBF) for trees ≥ 9” dbh, 11) quadratic mean diameter (QMD) for trees ≥ 2” dbh, 12) quadratic mean diameter for trees ≥ 9” dbh, 13) rumple index, 14) stand density index (SDI) for trees ≥ 9” dbh, 15) trees per acre (TPA) for trees ≥ 1’ tall, 16) trees per acre for trees ≥ 6” diameter at breast height (dbh), and 17) acres. The minimum map feature depicted on the map is 0.25 acres. This map product was generated using imagery primarily acquired between 2020 – 2024, reference information collected in the summers of 2023 – 2024, and LiDAR data flown in 2015. Every effort was taken to ensure consistency in the final products and these can be considered indicative of the existing vegetation conditions found within the project boundary during the growing season of 2024. All map products were designed according to National Forest Service vegetation mapping standards and are stored in federal databases. For more detailed information on mapping methodology please see the Tongass-Wide Vegetation Mapping Report: Tongass-Wide Vegetation Mapping Report (in progress): Bellante, G.; Dangerfield, C.; Foss, J.; Lund, A.; Caster, A.; Mohatt, K.; Homan, K.; Wittwer, D.; Johnson, T.; Goetz, W.; Moody, R.; Vernier, M.; Hemingway, B.; Achtenhagen, A.; Ryerson, D.; Megown, K.. 2025. Tongass National Forest Existing Vegetation Map. Salt Lake City, UT. In progress.

This raster layer Trees per Acre (TPA) information for the Central Tongass project area, prepared for the Central portion of the Tongass National Forest to provide up-to-date and more complete information about vegetative communities, structure, and patterns across the Forest. The Central Tongass project area encompasses over 3.7 million acres that were mapped through a partnership between the Geospatial Office (GO), Tongass National Forest, and the Alaska Regional Office. The Tongass National Forest and their partners prepared the regional classification system, identified the desired map units (map classes) and provided general project guidance. GO provided project support and expertise in vegetation mapping.The modeling units (mapping polygons) were characterized with the following vegetation attributes: 1) map group, 2) vegetation type, 3) tree canopy cover percent, 4) tree canopy cover class, 5) tree size class, 6) change percent, 7) change year, 8) biomass for trees ≥ 2” dbh, 9) crown competition factor, 10) gross board feet (GBF) for trees ≥ 9” dbh, 11) quadratic mean diameter (QMD) for trees ≥ 2” dbh, 12) quadratic mean diameter for trees ≥ 9” dbh, 13) rumple index, 14) stand density index (SDI) for trees ≥ 9” dbh, 15) trees per acre (TPA) for trees ≥ 1’ tall, 16) trees per acre for trees ≥ 6” diameter at breast height (dbh), and 17) acres. The minimum map feature depicted on the map is 0.25 acres. This map product was generated using imagery primarily acquired between 2020 – 2024, reference information collected in the summers of 2023 – 2024, and LiDAR data flown in 2015. Every effort was taken to ensure consistency in the final products and these can be considered indicative of the existing vegetation conditions found within the project boundary during the growing season of 2024. All map products were designed according to National Forest Service vegetation mapping standards and are stored in federal databases. For more detailed information on mapping methodology please see the Central and Northern Tongass Vegetation Mapping Report:Central and Northern Tongass Vegetation Mapping Report (in progress): Dangerfield, C.; Bellante, G.; Foss, J.; Lund, A.; Caster, A.; Mohatt, K.; Homan, K.; Wittwer, D.; Johnson, T.; Goetz, W.; Moody, R.; Vernier, M.; Hemingway, B.; Achtenhagen, A.; Ryerson, D.; Megown, K.. 2025. Tongass National Forest Existing Vegetation Map. Salt Lake City, UT. In progress.

This raster layer Stand Density Index (SDI) information for the Central Tongass project area, prepared for the Central portion of the Tongass National Forest to provide up-to-date and more complete information about vegetative communities, structure, and patterns across the Forest. The Central Tongass project area encompasses over 3.7 million acres that were mapped through a partnership between the Geospatial Office (GO), Tongass National Forest, and the Alaska Regional Office. The Tongass National Forest and their partners prepared the regional classification system, identified the desired map units (map classes) and provided general project guidance. GO provided project support and expertise in vegetation mapping.The modeling units (mapping polygons) were characterized with the following vegetation attributes: 1) map group, 2) vegetation type, 3) tree canopy cover percent, 4) tree canopy cover class, 5) tree size class, 6) change percent, 7) change year, 8) biomass for trees ≥ 2” dbh, 9) crown competition factor, 10) gross board feet (GBF) for trees ≥ 9” dbh, 11) quadratic mean diameter (QMD) for trees ≥ 2” dbh, 12) quadratic mean diameter for trees ≥ 9” dbh, 13) rumple index, 14) stand density index (SDI) for trees ≥ 9” dbh, 15) trees per acre (TPA) for trees ≥ 1’ tall, 16) trees per acre for trees ≥ 6” diameter at breast height (dbh), and 17) acres. The minimum map feature depicted on the map is 0.25 acres. This map product was generated using imagery primarily acquired between 2020 – 2024, reference information collected in the summers of 2023 – 2024, and LiDAR data flown in 2015. Every effort was taken to ensure consistency in the final products and these can be considered indicative of the existing vegetation conditions found within the project boundary during the growing season of 2024. All map products were designed according to National Forest Service vegetation mapping standards and are stored in federal databases. For more detailed information on mapping methodology please see the Central and Northern Tongass Vegetation Mapping Report:Central and Northern Tongass Vegetation Mapping Report (in progress): Dangerfield, C.; Bellante, G.; Foss, J.; Lund, A.; Caster, A.; Mohatt, K.; Homan, K.; Wittwer, D.; Johnson, T.; Goetz, W.; Moody, R.; Vernier, M.; Hemingway, B.; Achtenhagen, A.; Ryerson, D.; Megown, K.. 2025. Tongass National Forest Existing Vegetation Map. Salt Lake City, UT. In progress.

This raster Stand Density Index information for the Northern Tongass project area, prepared for the Northern portion of the Tongass National Forest to provide up-to-date and more complete information about vegetative communities, structure, and patterns across the Forest. Approximately 11.8 million acres, 8.6 million acres of which are terrestrial and inland waterbodies and rivers, were mapped through a partnership between the Geospatial Office (GO), Tongass National Forest, and the Alaska Regional Office. The Tongass National Forest and their partners prepared the regional classification system, identified the desired map units (map classes) and provided general project guidance. GO provided project support and expertise in vegetation mapping.The modeling units (mapping polygons) were characterized with the following vegetation attributes: 1) map group, 2) vegetation type, 3) tree canopy cover percent, 4) tree canopy cover class, 5) tree size class, 6) change percent, 7) change year, 8) biomass for trees ≥ 2” dbh, 9) crown competition factor, 10) gross board feet (GBF) for trees ≥ 9” dbh, 11) quadratic mean diameter (QMD) for trees ≥ 2” dbh, 12) quadratic mean diameter for trees ≥ 9” dbh, 13) rumple index, 14) stand density index (SDI) for trees ≥ 9” dbh, 15) trees per acre (TPA) for trees ≥ 1’ tall, 16) trees per acre for trees ≥ 6” diameter at breast height (dbh), and 17) acres. The minimum map feature depicted on the map is 0.25 acres. This map product was generated using imagery primarily acquired between 2020 – 2024, reference information collected in the summers of 2023 – 2024, and LiDAR data flown in 2015. Every effort was taken to ensure consistency in the final products and these can be considered indicative of the existing vegetation conditions found within the project boundary during the growing season of 2024. All map products were designed according to National Forest Service vegetation mapping standards and are stored in federal databases. For more detailed information on mapping methodology please see the Central and Northern Tongass Vegetation Mapping Report:Central and Northern Tongass Vegetation Mapping Report (in progress): Dangerfield, C.; Bellante, G.; Foss, J.; Lund, A.; Caster, A.; Mohatt, K.; Homan, K.; Wittwer, D.; Johnson, T.; Goetz, W.; Moody, R.; Vernier, M.; Hemingway, B.; Achtenhagen, A.; Ryerson, D.; Megown, K.. 2025. Tongass National Forest Existing Vegetation Map. Salt Lake City, UT. In progress.

This raster layer canopy closure information for the Northern Tongass project area, prepared for the Northern portion of the Tongass National Forest to provide up-to-date and more complete information about vegetative communities, structure, and patterns across the Forest. Approximately 11.8 million acres, 8.6 million acres of which are terrestrial and inland waterbodies and rivers, were mapped through a partnership between the Geospatial Office (GO), Tongass National Forest, and the Alaska Regional Office. The Tongass National Forest and their partners prepared the regional classification system, identified the desired map units (map classes) and provided general project guidance. GO provided project support and expertise in vegetation mapping.The modeling units (mapping polygons) were characterized with the following vegetation attributes: 1) map group, 2) vegetation type, 3) tree canopy cover percent, 4) tree canopy cover class, 5) tree size class, 6) change percent, 7) change year, 8) biomass for trees ≥ 2” dbh, 9) crown competition factor, 10) gross board feet (GBF) for trees ≥ 9” dbh, 11) quadratic mean diameter (QMD) for trees ≥ 2” dbh, 12) quadratic mean diameter for trees ≥ 9” dbh, 13) rumple index, 14) stand density index (SDI) for trees ≥ 9” dbh, 15) trees per acre (TPA) for trees ≥ 1’ tall, 16) trees per acre for trees ≥ 6” diameter at breast height (dbh), and 17) acres. The minimum map feature depicted on the map is 0.25 acres. This map product was generated using imagery primarily acquired between 2020 – 2024, reference information collected in the summers of 2023 – 2024, and LiDAR data flown in 2015. Every effort was taken to ensure consistency in the final products and these can be considered indicative of the existing vegetation conditions found within the project boundary during the growing season of 2024. All map products were designed according to National Forest Service vegetation mapping standards and are stored in federal databases. For more detailed information on mapping methodology please see the Central and Northern Tongass Vegetation Mapping Report:Central and Northern Tongass Vegetation Mapping Report (in progress): Dangerfield, C.; Bellante, G.; Foss, J.; Lund, A.; Caster, A.; Mohatt, K.; Homan, K.; Wittwer, D.; Johnson, T.; Goetz, W.; Moody, R.; Vernier, M.; Hemingway, B.; Achtenhagen, A.; Ryerson, D.; Megown, K.. 2025. Tongass National Forest Existing Vegetation Map. Salt Lake City, UT. In progress.

This raster layer Quadratic Mean Diameter (QMD) information for the Central Tongass project area, prepared for the Central portion of the Tongass National Forest to provide up-to-date and more complete information about vegetative communities, structure, and patterns across the Forest. The Central Tongass project area encompasses over 3.7 million acres that were mapped through a partnership between the Geospatial Office (GO), Tongass National Forest, and the Alaska Regional Office. The Tongass National Forest and their partners prepared the regional classification system, identified the desired map units (map classes) and provided general project guidance. GO provided project support and expertise in vegetation mapping.The modeling units (mapping polygons) were characterized with the following vegetation attributes: 1) map group, 2) vegetation type, 3) tree canopy cover percent, 4) tree canopy cover class, 5) tree size class, 6) change percent, 7) change year, 8) biomass for trees ≥ 2” dbh, 9) crown competition factor, 10) gross board feet (GBF) for trees ≥ 9” dbh, 11) quadratic mean diameter (QMD) for trees ≥ 2” dbh, 12) quadratic mean diameter for trees ≥ 9” dbh, 13) rumple index, 14) stand density index (SDI) for trees ≥ 9” dbh, 15) trees per acre (TPA) for trees ≥ 1’ tall, 16) trees per acre for trees ≥ 6” diameter at breast height (dbh), and 17) acres. The minimum map feature depicted on the map is 0.25 acres. This map product was generated using imagery primarily acquired between 2020 – 2024, reference information collected in the summers of 2023 – 2024, and LiDAR data flown in 2015. Every effort was taken to ensure consistency in the final products and these can be considered indicative of the existing vegetation conditions found within the project boundary during the growing season of 2024. All map products were designed according to National Forest Service vegetation mapping standards and are stored in federal databases. For more detailed information on mapping methodology please see the Central and Northern Tongass Vegetation Mapping Report:Central and Northern Tongass Vegetation Mapping Report (in progress): Dangerfield, C.; Bellante, G.; Foss, J.; Lund, A.; Caster, A.; Mohatt, K.; Homan, K.; Wittwer, D.; Johnson, T.; Goetz, W.; Moody, R.; Vernier, M.; Hemingway, B.; Achtenhagen, A.; Ryerson, D.; Megown, K.. 2025. Tongass National Forest Existing Vegetation Map. Salt Lake City, UT. In progress.

This raster layer rumple index for the Northern Tongass project area, prepared for the Northern portion of the Tongass National Forest to provide up-to-date and more complete information about vegetative communities, structure, and patterns across the Forest. Approximately 11.8 million acres, 8.6 million acres of which are terrestrial and inland waterbodies and rivers, were mapped through a partnership between the Geospatial Office (GO), Tongass National Forest, and the Alaska Regional Office. The Tongass National Forest and their partners prepared the regional classification system, identified the desired map units (map classes) and provided general project guidance. GO provided project support and expertise in vegetation mapping.The modeling units (mapping polygons) were characterized with the following vegetation attributes: 1) map group, 2) vegetation type, 3) tree canopy cover percent, 4) tree canopy cover class, 5) tree size class, 6) change percent, 7) change year, 8) biomass for trees ≥ 2” dbh, 9) crown competition factor, 10) gross board feet (GBF) for trees ≥ 9” dbh, 11) quadratic mean diameter (QMD) for trees ≥ 2” dbh, 12) quadratic mean diameter for trees ≥ 9” dbh, 13) rumple index, 14) stand density index (SDI) for trees ≥ 9” dbh, 15) trees per acre (TPA) for trees ≥ 1’ tall, 16) trees per acre for trees ≥ 6” diameter at breast height (dbh), and 17) acres. The minimum map feature depicted on the map is 0.25 acres. This map product was generated using imagery primarily acquired between 2020 – 2024, reference information collected in the summers of 2023 – 2024, and LiDAR data flown in 2015. Every effort was taken to ensure consistency in the final products and these can be considered indicative of the existing vegetation conditions found within the project boundary during the growing season of 2024. All map products were designed according to National Forest Service vegetation mapping standards and are stored in federal databases. For more detailed information on mapping methodology please see the Central and Northern Tongass Vegetation Mapping Report:Central and Northern Tongass Vegetation Mapping Report (in progress): Dangerfield, C.; Bellante, G.; Foss, J.; Lund, A.; Caster, A.; Mohatt, K.; Homan, K.; Wittwer, D.; Johnson, T.; Goetz, W.; Moody, R.; Vernier, M.; Hemingway, B.; Achtenhagen, A.; Ryerson, D.; Megown, K.. 2025. Tongass National Forest Existing Vegetation Map. Salt Lake City, UT. In progress.

This raster layer canopy closure information for the Northern Tongass project area, prepared for the Northern portion of the Tongass National Forest to provide up-to-date and more complete information about vegetative communities, structure, and patterns across the Forest. Approximately 11.8 million acres, 8.6 million acres of which are terrestrial and inland waterbodies and rivers, were mapped through a partnership between the Geospatial Office (GO), Tongass National Forest, and the Alaska Regional Office. The Tongass National Forest and their partners prepared the regional classification system, identified the desired map units (map classes) and provided general project guidance. GO provided project support and expertise in vegetation mapping.The modeling units (mapping polygons) were characterized with the following vegetation attributes: 1) map group, 2) vegetation type, 3) tree canopy cover percent, 4) tree canopy cover class, 5) tree size class, 6) change percent, 7) change year, 8) biomass for trees ≥ 2” dbh, 9) crown competition factor, 10) gross board feet (GBF) for trees ≥ 9” dbh, 11) quadratic mean diameter (QMD) for trees ≥ 2” dbh, 12) quadratic mean diameter for trees ≥ 9” dbh, 13) rumple index, 14) stand density index (SDI) for trees ≥ 9” dbh, 15) trees per acre (TPA) for trees ≥ 1’ tall, 16) trees per acre for trees ≥ 6” diameter at breast height (dbh), and 17) acres. The minimum map feature depicted on the map is 0.25 acres. This map product was generated using imagery primarily acquired between 2020 – 2024, reference information collected in the summers of 2023 – 2024, and LiDAR data flown in 2015. Every effort was taken to ensure consistency in the final products and these can be considered indicative of the existing vegetation conditions found within the project boundary during the growing season of 2024. All map products were designed according to National Forest Service vegetation mapping standards and are stored in federal databases. For more detailed information on mapping methodology please see the Central and Northern Tongass Vegetation Mapping Report:Central and Northern Tongass Vegetation Mapping Report (in progress): Dangerfield, C.; Bellante, G.; Foss, J.; Lund, A.; Caster, A.; Mohatt, K.; Homan, K.; Wittwer, D.; Johnson, T.; Goetz, W.; Moody, R.; Vernier, M.; Hemingway, B.; Achtenhagen, A.; Ryerson, D.; Megown, K.. 2025. Tongass National Forest Existing Vegetation Map. Salt Lake City, UT. In progress.

This raster layer representing tree size information for the Northern Tongass project area, prepared for the Northern portion of the Tongass National Forest to provide up-to-date and more complete information about vegetative communities, structure, and patterns across the Forest. Approximately 11.8 million acres, 8.6 million acres of which are terrestrial and inland waterbodies and rivers, were mapped through a partnership between the Geospatial Office (GO), Tongass National Forest, and the Alaska Regional Office. The Tongass National Forest and their partners prepared the regional classification system, identified the desired map units (map classes) and provided general project guidance. GO provided project support and expertise in vegetation mapping.The modeling units (mapping polygons) were characterized with the following vegetation attributes: 1) map group, 2) vegetation type, 3) tree canopy cover percent, 4) tree canopy cover class, 5) tree size class, 6) change percent, 7) change year, 8) biomass for trees ≥ 2” dbh, 9) crown competition factor, 10) gross board feet (GBF) for trees ≥ 9” dbh, 11) quadratic mean diameter (QMD) for trees ≥ 2” dbh, 12) quadratic mean diameter for trees ≥ 9” dbh, 13) rumple index, 14) stand density index (SDI) for trees ≥ 9” dbh, 15) trees per acre (TPA) for trees ≥ 1’ tall, 16) trees per acre for trees ≥ 6” diameter at breast height (dbh), and 17) acres. The minimum map feature depicted on the map is 0.25 acres. This map product was generated using imagery primarily acquired between 2020 – 2024, reference information collected in the summers of 2023 – 2024, and LiDAR data flown in 2015. Every effort was taken to ensure consistency in the final products and these can be considered indicative of the existing vegetation conditions found within the project boundary during the growing season of 2024. All map products were designed according to National Forest Service vegetation mapping standards and are stored in federal databases. For more detailed information on mapping methodology please see the Central and Northern Tongass Vegetation Mapping Report:Central and Northern Tongass Vegetation Mapping Report (in progress): Dangerfield, C.; Bellante, G.; Foss, J.; Lund, A.; Caster, A.; Mohatt, K.; Homan, K.; Wittwer, D.; Johnson, T.; Goetz, W.; Moody, R.; Vernier, M.; Hemingway, B.; Achtenhagen, A.; Ryerson, D.; Megown, K.. 2025. Tongass National Forest Existing Vegetation Map. Salt Lake City, UT. In progress.