Level III Ecoregions of Texas

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）已从无缝全国形状文件（shapefile）中提取得到。生态区指在生态系统、生态类型与质量以及……等方面具备整体相似性的区域。