Funny, because that article says exactly the same.
"Short" distances are calculated by parallax, taking Earth's orbit diameter as the base.
From there, it's a extrapolation of the spectrum of known types of objects. Not triangulation. Moreover, IIRC individual stars can't be discerned in other galaxies, even the nearest ones, except maybe supernovas.
So at the distances that red shift manifests, no triangulation, only red shift.
"Short" distances are calculated by parallax, taking Earth's orbit diameter as the base.
From there, it's a extrapolation of the spectrum of known types of objects. Not triangulation. Moreover, IIRC individual stars can't be discerned in other galaxies, even the nearest ones, except maybe supernovas.
So at the distances that red shift manifests, no triangulation, only red shift.