I'm guessing that it would be 'master plan'. I found this example online:
"... ha entregado el diseño de la configuración del aeropuerto (Plano Director), un elemento clave para definir su ordenación." Here it clearly refers to a MASTER PLAN.
2014년 9월 23일
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I searched the web and Google Translate and it seems to mean "Master plan"
Master Plan
Definition: a general plan for achieving an objective