  In this paper we present a large database of weak lensing light cones
constructed using different snapshots from the Big MultiDark simulation
(BigMDPL). The ray-tracing through different multiple planes has been performed
with the GLAMER code accounting both for single source redshifts and for
sources distributed along the cosmic time. This first paper presents weak
lensing forecasts and results according to the geometry of the VIPERS-W1 and
VIPERS-W4 field of view. Additional fields will be available on our database
and new ones can be run upon request. Our database also contains some tools for
lensing analysis. In this paper we present results for convergence power
spectra, one point and high order weak lensing statistics useful for forecasts
and for cosmological studies. Covariance matrices have also been computed for
the different realisations of the W1 and W4 fields. In addition we compute also
galaxy-shear and projected density contrasts for different halo masses at two
lens redshifts according to the CFHTLS source redshift distribution both using
stacking and cross-correlation techniques, finding very good agreement.
