The Pleiades product is an image that has been corrected (viewing angle and ground effects), so that it can be superimposed on a map. Radiometric and geometric adjustments, and the use of a 3D model to reproduce relief, mean that all ‘perspective’ effects are eliminated, simulating a vertical shot. A Pléiades DTM with 5m posting is used for ground corrections and gives the best compromise between accuracy and aesthetics of the ortho-image.
The archive imagery gives you access to unique historical high- resolution data collected over the last three decades and spanning over 100 billion km2 (i.e. covering the land mass over 700 times).