Tree Swallow Predicted Habitat - CWHR B339 [ds2236]

CWHR Predicted Habitat Suitability. This dataset represents areas of suitable habitat within the species ranges based on California Wildlife Habitat Relationships (CWHR 2016) and a statewide best-available vegetation map (FVEG2015, FRAP 2015). Habitat suitability ranks of Low (less than 0.34), Medium (0.34-0.66), and High (greater than 0.66) suitability are based on the mean expert opinion suitability value for each habitat type for breeding, foraging, and cover.

Please note that the data is represented in raster format with a pixel size of 30 meters. In the case of species that rely on habitat types that are difficult to map at this scale, such as riparian or wetland habitat types, the amount of representative habitat may be underestimated or inaccurately mapped due to aggregation into pixels with a majority type not used by the species.

CWHR预测生境适宜性（CWHR Predicted Habitat Suitability）。本数据集基于2016年版加州野生动物生境关系（California Wildlife Habitat Relationships, CWHR 2016）及全州最优可用植被图（FVEG2015、FRAP 2015），绘制了物种分布范围内的适宜生境区域。生境适宜性等级划分为低（适宜值小于0.34）、中（适宜值0.34至0.66）与高（适宜值大于0.66），其划分依据为各生境类型在繁殖、觅食及遮蔽活动中的专家意见适宜值均值。

请注意，本数据集采用栅格（raster）格式存储，像素尺寸为30米。对于依赖难以在此比例尺下精准制图的生境类型（如河岸生境（riparian habitat）、湿地生境（wetland habitat））的物种而言，因像素聚合时会将多数区域归类为物种未利用的优势地类，其代表性生境的面积可能被低估或出现制图偏差。