The art of site plan? technically or artistically?

Lbirapuera Park, project, São Paulo, Brazil, Site plan. 1953 by Roberto Burle Marx and Oscar Niemeyer.
source: Moma

The Atheneum, New Harmony, Indiana,  Site plan, study by Richard Meier

source: Moma

Pavillon président Kennedy, Université du Québec à Montréal 

Site plan study, courtyard side; park over underground services by Ewan Branda.

source: ffffound

Zaragoza Bridge Pavilion, Zaragoza, Spain, Lower Floor Site Plan by Zaha Hadid
source: arcspace

After seeing so many site plans by different iconic architect,  Is this how we should approach to our drawings, technically or artistically?