Level IV Ecoregions of Vermont

Ecoregions by state were extracted from the seamless national shapefile. Ecoregions denote areas of general similarity in ecosystems and in the type, quality, and...按州划分的生态区从无缝拼接的全国形状文件（shapefile）中提取获得。生态区指在生态系统特征、类型与质量等方面具备总体相似性的区域……