Level III Ecoregions of Maine
收藏data.gov2025-04-26 收录
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Ecoregions by state were extracted from the seamless national shapefile. Ecoregions denote areas of general similarity in ecosystems and in the type, quality, and...
各州生态区（Ecoregions）从无缝全国shapefile中提取得到。生态区指在生态系统及生态类型、质量等方面具备总体相似性的区域……
