Estimated photo-z as determined by SPIDERz versus the actual redshift for the PHAT-1 data set discussed in Sect. 3.1 for the case of 14 photometric bands. This determination is with a training set consisting of 94 galaxies chosen at random and an evaluation set consisting of the other 280 galaxies. Outliers are defined by Eq. (1), shown as those outside of the two diagonal lines. This determination results in 15.3% outliers and a reduced RMS of 0.067, which, despite the smaller training set available, is competitive with the results obtained by other empirical methods as shown in Table 1 and discussed in Sect. 3.2.