  Current and upcoming wide-field surveys for weak gravitational lensing and
the Sunyaev-Zel'dovich effect will generate mass-selected catalogues of dark
matter halos with internal or followup photometric redshift information. The
angular power spectrum of these halos provides additional information that
complements the previously-studied number counts. In particular, using the
shape of the linear power spectrum as a standard ruler that is calibrated by
cosmic microwave background measurements, we find that a survey of 4000 sqr.
deg. and a mass threshold of 10^14 M_sun can be used to determine the comoving
angular diameter distance as a function of redshift. In principle, this test
also allows an absolute calibration of the distance scale and measurement of
the Hubble constant. This test is largely insensitive to the details of halo
mass measurements, mass function, and halo bias. Determination of these
quantities would further allow a measurement of the linear growth rate of
fluctuations.
