{"accessLevel": "public", "bureauCode": ["010:24"], "contactPoint": {"@type": "vcard:Contact", "fn": "NPS IRMA Help", "hasEmail": "mailto:NRSS_DataStore@nps.gov"}, "description": "The National Park Service and Geographic Information Network of Alaska (GINA) developed an algorithm to derive annual growing season metrics for Alaska using Moderate Resolution Imaging Spectroradiometer (MODIS) data, specifically eMODIS data provided by the U.S. Geological Survey (USGS) Earth Resources Observation and Science (EROS) Center (https://doi.org/10.5066/F7H41PNT). The data products from this project are available as 250m-resolution raster images of MODIS-derived yearly NDVI metrics. The data coverage for growing season metrics derived from eMODIS version 6 includes the entire state of Alaska for the years between 2003 and 2021, and metrics derived from eMODIS version 5 include years 2000-2016. Currently version 6 are available for download.\n\nThe algorithm takes 7-day composite eMODIS NDVI data, performs data stacking, interpolating, smoothing, and then calculates the NDVI metrics. The yearly NDVI metrics data include 12 metrics:\n\nday of onset of greenness (onp),\n\nNDVI value at onset day (onv),\n\nday of end of greenness (endp),\n\nNDVI value at the end day of greenness (endv),\n\nthe duration of greenness season (durp),\n\nthe day of the maximum NDVI value (maxp),\n\nmaximum NDVI value (maxv),\n\nrange of NDVI values (ranv),\n\nrate of green up (rtup),\n\nrate of senescence (rtdn),\n\ntime-integrated NDVI (tindvi),\n\nNDVI metrics flag (mflg) where -1=no data, 0=not valid data, 1=good data", "identifier": "http://datainventory.doi.gov/id/dataset/NPS_DataStore_2313046", "issued": "2025-01-01T00:00:00Z", "keyword": ["Growing Season", "MODIS", "Phenology", "Satellite Remote Sensing", "Vegetation"], "landingPage": "https://irma.nps.gov/DataStore/Reference/Profile/2313046", "modified": "2025-01-01T00:00:00Z", "programCode": ["010:118", "010:119"], "publisher": {"@type": "org:Organization", "name": "National Park Service"}, "spatial": "-179,49,-114.5,73", "temporal": "2003-01-01/2021-01-01", "theme": ["Raster Dataset"], "title": "Growing Season Metrics for Alaska Derived from the Moderate Resolution Imaging Spectroradiometer (MODIS) Satellite Normalized Difference Vegetation Index (NDVI) 2003-2021"}