FRACTIONAL IMPERVIOUS SURFACE 1985 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.本数据集为纳拉甘西特湾、小纳拉甘西特湾及西南沿海池塘流域提供了空间分辨率30米的分数不透水面（fractional impervious surface）无缝栅格数据。本数据集系为2026年《现状与趋势报告》（nbep.org）编制，可应用于流域及子流域尺度下的通用规划、图形展示与地理信息系统（GIS）分析。