Forested Montane: AAF Classified (Predicted Area-adjusted Frequency of Golden Eagle Nest Sites)

<div style='text-align:Left;'><div><div><p><span>This raster dataset represents predicted Area-adjusted Frequency (Classified AAF) of golden eagle nest sites. This surface shows AAF classes, which are identified by a numeric code (1-7). Each code corresponds to a descriptive density category representing a range of continuous AAF values (1:very low density &lt;- 0-0.083, 2:low density &lt;- 0.083-0.2, 3:moderate-low density &lt;- 0.2-0.5, 4:neutral density &lt;- 0.5-2, 5:moderate-high density &lt;- 2-5, 6:high density &lt;- 5-12, 7:very high density &lt;- 12-infinity). Continuous AAF values were estimated from predicted RND and then reclassified to the density categories to provide a more easily interpreted visualization of relative AAF. Development of golden eagle RND models are described in Dunk JR, Woodbridge B, Lickfett TM, Bedrosian G, Noon BR, LaPlante DW, et al. (2019) Modeling spatial variation in density of golden eagle nest sites in the western United States. PLoS ONE 14(9): e0223143 (https://doi.org/10.1371/journal.pone.0223143). Additional information on model products (including RND and AAF surfaces), and guidance for their use is provided at https://ecos.fws.gov/ServCat/Reference/Profile/112631. Model data and products are available for download at https://ecos.fws.gov/ServCat/Reference/Profile/111283.</span></p></div></div></div>

本栅格数据集展示了金雕巢址的预测面积调整频率（Area-adjusted Frequency，AAF）的分类结果（Classified AAF）。该栅格表面以1至7的数字编码标识不同的AAF类别，每个编码对应一个描述性密度类别，代表一段连续的AAF值范围：1为极低密度，对应0~0.083；2为低密度，对应0.083~0.2；3为中低密度，对应0.2~0.5；4为中等密度，对应0.5~2；5为中高密度，对应2~5；6为高密度，对应5~12；7为极高密度，对应12~正无穷。连续AAF值首先通过预测得到的相对巢密度（Relative Nest Density，RND）估算得出，随后被重分类至上述密度类别，以更直观地展示相对AAF的空间分布，提升可视化结果的可解释性。金雕RND模型的开发细节详见以下文献：Dunk JR、Woodbridge B、Lickfett TM、Bedrosian G、Noon BR、LaPlante DW等（2019）《美国西部金雕巢址密度的空间变异建模》，PLoS ONE 14(9): e0223143（https://doi.org/10.1371/journal.pone.0223143）。关于模型产品（含RND与AAF栅格表面）的更多信息及使用指南，可访问以下链接：https://ecos.fws.gov/ServCat/Reference/Profile/112631。模型数据与产品可通过以下链接下载：https://ecos.fws.gov/ServCat/Reference/Profile/111283。