I have started using Google Maps to pinpoint the world's major climbs. Its a time-consuming exercise, and I am only part-way through completing the Alps, Pyrenees, and Dolomite passes (at least the hors categorie and cat-1 climbs).
This file can be shared, so email me directly if you either want a copy, or if you'd like to add climbs. I am still working on Italy's Giro and Spain's Vuelta, as well as New Zealand and Colombia.
I have climbed the red pins. Blue pins are still on my list.
View Global Climbs in a larger map