  We propose a methodology to measure the cosmological spatial curvature by
employing the deviation from statistical isotropy due to the Alcock-Paczy\'nski
effect of large scale galaxy clustering. This approach has a higher degree of
model independence than most other proposed methods, being independent of
calibration of standard candles, rulers, or clocks, of the power spectrum shape
(and thus also of the pre-recombination physics), of the galaxy bias, of the
theory of gravity, of the dark energy model and of the background cosmology in
general. We find that a combined DESI-Euclid galaxy survey can achieve $\Delta
\Omega_{k0}=0.057$ at 1$\sigma$ C.L. in the redshift range $z<2$ by combining
power-spectrum and bispectrum measurements.
