| Summary: | Circumpolar Arctic Man-made Impervious Surface Area (CAMI) is a series of fine spatial resolution man-made impervious surface maps covering the entire circumpolar area northward the Arctic treeline. So far, CAMI consists of two individual products: CAMI and CAMI-2020. Both products were generated using the Google Earth Engine platform. The CAMI product contains annual change information of Pan-Arctic impervious surface area from 1999 to 2018 at a 30m resolution. The year of the transition (i.e., from pervious to impervious) is identified from the pixel DN value, ranging from 1999 to 2018. All other DN values represent non-impervious. The CAMI product is generally organized and named as country-specfic rar files in Esri Grid format, with suffixes CA, US, and NE representing Canada, United States of America, and Nordic countries/regions including Norway, Greenland, and Iceland. Due to the large file size, we further divided CAMI within Russia into three parts: RU1, RU2, and RU3. The CAMI-2020 product is an updated version of CAMI that maps Pan-Arctic man-made impervious surfaces at a 10m spatial resolution circa 2020. The product is provided in TIFF format, including six files representing six countries/regions (United States of America, Canada, Greenland, Iceland, Norway and Russia respectively) in the Arctic. Each file was named as "CAMI2020_" plus the countries/region name. The DN value of 8 represents imperviousness, while others are natural land covers.
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