meier has exploited the two naturally-occurring ridges (which diverge at a 22.5 degree angle) by overlaying two grids along these axes. these grids serve to define the space of the campus while dividing the import of the buildings on it. along one axis lie the galleries and along the other axis lie the administrative buildings. meier emphasized the two competing grids by constructing strong view lines through the campus. the main north-south axis starts with the helipad, then includes a narrow walkway between the auditorium and north buildings, continues past the elevator kiosk to the tram station, through the rotunda, past the walls and support columns of the exhibitions pavilion, and finally the ramp besides the west pavilion and the central garden. its corresponding east-west visual axis starts with the edge of the scholar's wing of the getty research institute (gri), the walkway between the central garden and the gri, the overlook to the azalea pool in the central garden, the walkway between the central garden and the west pavilion, and finally the north wall of the west pavilion and the courtyard between the south and east pavilions.