The International Union for Conservation of Nature (IUCN) Red List of Threatened Species includes assessment of extinction risk for 98 512 species, plus documentation of their range, habitat, elevation, and other factors. These range, habitat and elevation data can be matched with terrestrial land cover and elevation datasets to map the species' area of habitat (AOH; also known as extent of suitable habitat; ESH). This differs from the two spatial metrics used for assessing extinction risk in the IUCN Red List criteria: extent of occurrence (EOO) and area of occupancy (AOO). AOH can guide conservation, for example, through targeting areas for field surveys, assessing proportions of species' habitat within protected areas, and monitoring habitat loss and fragmentation. We recommend that IUCN Red List assessments document AOH wherever practical.

中文翻译：

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《人居世界陆地面积的测量》（AOH）及其对IUCN红色名录的实用性。

国际自然保护联盟（IUCN）濒危物种红色名录包括对98 512种物种灭绝风险的评估，以及有关其范围，栖息地，海拔和其他因素的文献记录。这些范围，栖息地和海拔数据可以与陆地土地覆盖和海拔数据集进行匹配，以绘制该物种的栖息地面积（AOH；也称为合适栖息地的范围； ESH）。这不同于IUCN红色名录标准中用于评估灭绝风险的两个空间度量标准：发生程度（EOO）和居住面积（AOO）。AOH可以指导保护工作，例如，通过针对区域进行野外调查，评估保护区内物种栖息地的比例以及监视栖息地的丧失和破碎化。