In upscaling , to generate an unbiased aggregation of a sparsely sampled variable from an uneven environment , use a richly sampled indicator that covaries with the variable of interest ( a scalar ) to create a weighted average 尺度上推時(shí),要從不規(guī)則的環(huán)境中建立分散取樣變量的無(wú)偏集合,就利用與影響變量(標(biāo)量)共變的已充分取樣的指標(biāo)得到加權(quán)平均值。