442024EE-7115-4790-BD94-D45695917A87 eng utf8 dataset dataset EnviroAtlas Coordinator U.S. Environmental Protection Agency, Office of Research and Development - Center for Public Health and Environmental Assessment (CPHEA), EnviroAtlas Geospatial Data Owner (919) 541-3832 109 T.W. Alexander Drive Research Triangle Park NC 27709 EnviroAtlas@epa.gov https://www.epa.gov/enviroatlas pointOfContact 2025-08-01 ISO 19139 Geographic Information - Metadata - Implementation Specification 2007 geometryOnly composite 32655 EPSG 9.8.8(3.0.1) EnviroAtlas - Landcover Summaries by Place for American Samoa 2024-10-18 creation 2024-12-12 publication U.S. Environmental Protection Agency (US EPA) originator U.S. EPA Office of Research and Development (ORD) - Center for Public Health and Environmental Assessment (CPHEA) Research Triangle Park, NC publisher EnviroAtlas Coordinator U.S. Environmental Protection Agency, Office of Research and Development - Center for Public Health and Environmental Assessment (CPHEA), EnviroAtlas Geospatial Data Owner (919) 541-3832 109 T.W. Alexander Drive Research Triangle Park NC 27709 EnviroAtlas@epa.gov pointOfContact mapDigital This EnviroAtlas dataset represents the percentage of land area within each census place in American Samoa that is classified as Canopy, Impervious Surface, and Vegetation using the 2022 NOAA Coastal Change Analysis Program (C-CAP) dataset. It also includes calculations of these landcover classes per capita (square meters per person) by place based on 2020 United States Census data. Finally, ratios of canopy to impervious surface and vegetation to impervious surface were calculated by place. Vegetation includes canopy and scrub/shrub classes, but does not include other types of green space. Datasets for other geographies were produced separately; metadata for these related datasets may be found here: Guam https://enviroatlas.epa.gov/enviroatlas/MetadataFGDC/CanopyVegetationImpervious_GU_place.xml, Northern Mariana Islands https://enviroatlas.epa.gov/enviroatlas/MetadataFGDC/CanopyVegetationImpervious_CNMI_place.xml. 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 is useful for evaluating the potential value of ecosystem services provided by vegetation communities, and the impacts of developed land cover. The overall goal of EnviroAtlas is to employ and develop the best available science to map indicators of ecosystem services production, demand, and drivers for the nation. completed EnviroAtlas Coordinator U.S. Environmental Protection Agency, Office of Research and Development - Center for Public Health and Environmental Assessment (CPHEA), EnviroAtlas Geospatial Data Owner (919) 541-3832 109 T.W. Alexander Drive Research Triangle Park NC 27709 EnviroAtlas@epa.gov https://www.epa.gov/enviroatlas publisher asNeeded American Samoa United States United States Pacific Territories place EPA Place Names 2015-01-31 publication Ecosystem Environment theme EPA GIS Keyword Thesaurus 2007-11-02 publication Ecosystem Services EnviroAtlas Environment Environmental Atlas Green Space Land Cover theme User 2022-01-11 publication 020:072 theme Federal Program Inventory 2013-09-16 publication None. Please check sources, scale, accuracy, currency and other available information. Please confirm that you are using the most recent copy of both data and metadata. Acknowledgement of the EPA would be appreciated. EPA Public Domain License licenseUnrestricted https://edg.epa.gov/EPA_Data_License.html unclassified https://project-open-data.github.io/schema/#accessLevel vector eng utf8 Microsoft Windows 10 Version 10.0 (Build 22631) ; Esri ArcGIS 13.3.0.52636 Census boundaries and population data are from the year 2020. NOAA C-CAP data are from the year 2022. true -171.089874 -169.418802 -14.37374 -11.046934 2020-01-01T00:00:00 2022-12-31T00:00:00 This dataset can be merged to the Pacific Territories 2020 Census Place feature classes (cb_2020_60_place_500k) using the field 'AFFGEOID.' File Geodatabase Feature Class https://enviroatlas.epa.gov/download/CanopyVegetationImpervious_AS.gdb.zip download download https://enviroatlas-epa.hub.arcgis.com/search?tags=EA-CanopyVegetationImpervious ESRI:ArcGIS offlineAccess https://www.epa.gov/enviroatlas/enviroatlas-data information information https://www.epa.gov/enviroatlas information information dataset Tests for integrity have not been performed. EPA National Geospatial Data Policy Features have been reviewed by U.S. EPA EnviroAtlas Project Managers for public release. true Features represented have not been tested for completeness EPA National Geospatial Data Policy Features have been reviewed by U.S. EPA EnviroAtlas Project Managers for public release. true September - October 2024 Input Data 1. Feature Classes: 2020 Census place shapefiles for American Samoa. 2. Land Cover Rasters: 2022 NOAA C-CAP rasters for water, impervious surface, and canopy for each territory. (https://coastalimagery.blob.core.windows.net/ccap-landcover/CCAP_bulk_download/High_Resolution_Land_Cover/Phase_1_Initial_Layers/index.html) 3. Population Data: 2020 Census Island Area Demographic Profile population data by place for each territory (https://www.census.gov/geographies/mapping-files/time-series/geo/cartographic-boundary.2020.html#list-tab-1883739534). Processing Steps 1. Coordinate Transformation o Place boundary feature classes were transformed from NAD 1983 to WGS 1984 UTM Zone 2S. o Rasters were already in WGS 1984 UTM Zone 2S. 2. Land Cover Tabulation o Areas for each land cover raster were calculated per place using Tabulate Area with the AFFGEOID column as the zone field. o Tabulated results were joined to the place feature class via the AFFGEOID column. 3. Calculations Five derived fields were added to the block group attribute table and calculated as follows: o PercentLandCanopy = (Area of canopy (value 1)/Area of land (water value 0))×100 o PercentLandImpervious = (Area of impervious surface (value 1)/Area of land (water value 0))×100 o PercentLandVegetation = (Area of canopy (values 1 + 2)/Area of land (water value 0))×100 o CanopyImpRatio = Area of canopy (value 1)/Area of impervious surface (value 1) o VegetationImpRatio = Area of canopy raster (values 1 + 2)/Area of impervious surface (value 1) Note: In the canopy raster, values 1 and 2 represent "canopy" and "scrub/shrub" respectively. In the impervious raster, value 1 represents impervious surface. In the water raster, value 0 represents land area and value 1 represents water area. 4. Population Data Integration o The 2020 census population table was joined to the place table via the AFFGEOID column. 5. Per Capita Metrics Three additional fields were added and calculated as follows: o CanopyPerCapita = Area of canopy (value 1)/Population o ImperviousPerCapita = Area of impervious surface (value 1)/Population o VegetationPerCapita = Area of canopy (values 1 + 2)/Population The final tables for each of the three territories were merged. asNeeded