Estimated photo-z as determined by SPIDERz versus the actual redshift for the COSMOSx3D-HST data set discussed in Sect. 5. This determination is with the ten-band photometric data and a training set consisting of 1200 galaxies chosen at random and an evaluation set consisting of the other 1848 galaxies, with a bin size of 0.1. Outliers in a determination are defined by Eq. (1), shown as those outside of the two diagonal lines. The density of points within the lines is quite high – only 2.6% of points lie outside of the lines as outliers. This determination features a reduced RMS error of 0.04.