I. INTRODUCTION  
II. FORMALISM  
III. DATA AND SPECIFICATIONS  
A. Galaxy lenses  
B. Galaxy shear sources: Euclid-like photometric survey  
C. CMB lensing source  
IV. COSMOGRAPHIC LENSING RATIO MEASUREMENTS  
A. The cosmographic ratio limit  
B. Forecasts for future experiments  
V. A GENERALIZED LENSING RATIO ESTIMATOR  
A. Number counts angular power spectrum  
B. Signal-to-noise analysis  
VI. COSMOLOGICAL PARAMETER CONSTRAINTS  
VII. CONCLUSIONS