Weighted distance to any water features (index)

Euclidean distance (in geographic degrees) to any (natural) water feature weighted by minor/major waterbody or watercourse (Geoscience Australia 2006). Major water features were given a weight value of 3. Minor water features were given a weight value of 1. Weights were multiplied by 1 for non-permanent water features or by 3 for permanent water features.

本数据集采用澳大利亚地质调查局（Geoscience Australia）2006年发布的分类体系，计算任意天然水体要素的地理度数欧氏距离，并按主次水体或水道进行加权赋值：主水体要素权重值为3，次水体要素权重值为1；同时，非永久性水体特征的权重需乘以1，永久性水体特征的权重则乘以3。