Most frequently we used the Landsat 7 images, Our results showed that for low prevalence values very high AUC values can be expected from randomly drawn points (Fig. 3.1; Table S3.1). Olden et al. (2002) too reported such high accuracy values for low (and high) prevalence.
The 95% C.I. AUC value of the bias corrected null-model for 15 records (prevalence = 1.48%) was as high as 0.9622 (Fig. 3.1; Table S3.1).