FRACTIONAL IMPERVIOUS SURFACE 2005 NBEP2026 (raster)

Seamless raster of fractional impervious surface for the Narragansett Bay, Little Narragansett Bay, and Southwest Coastal ponds watersheds with a 30-meter resolution. This dataset was created for the 2026 Status and Trends report (nbep.org) and is intended for general planning, graphic display, and GIS analysis at the watershed and subwatershed scale.针对纳拉甘西特湾（Narragansett Bay）、小纳拉甘西特湾（Little Narragansett Bay）及西南沿海池塘流域，构建了分辨率为30米的不透水面盖度（fractional impervious surface）无缝栅格数据集。本数据集专为2026年《现状与趋势报告》（nbep.org）编制，可用于流域及子流域尺度的通用规划、图形展示与地理信息系统（GIS）分析。