Level III Ecoregions of Ohio

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（Ecoregions）提取自无缝衔接的国家级shapefile。生态区指在生态系统、生态类型、生态质量等方面具有总体相似性的区域，以及……