Schematic of a three-method search for giants. Of all giants in the survey footprint up to z = z_max, only those for which the lobe surface brightness at the observing frequency ν_obs is above detection threshold b_ν, th are identifiable. 𝒢 denotes the actually identified set of giants. 𝒢₁, 𝒢₂, and 𝒢₃ are the subsets identified by each method individually. As an example, we shade 𝒢₂ ∪ 𝒢₃, which has overlap with 𝒢₁, and which can be used to measure p_{obs, ID, 1}(l_p, z).