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Over a period of three decades a large number of surveys have been produced which represent the Mulu caves.  Many of these are of the same cave, but because the caves have been extended or connected together, then a new survey had to be produced.  Drafting techniques have changed too, especially since computers became readibly available.  Below are three examples of cave surveys from Gunung Mulu National Park.  Each survey is from a new decade and represents a different style.

The 1978 RGS Mulu Expedition Deer Cave survey uses simple techniques.  Drawn up on graph paper in the field the survey was ’inked’ onto drafting film before final printing.  Although a huge cave it is very simple to represent.

The 1978 RGS Deer Cave survey. Survey © Mulu Caves Project

The 1989 Clearwater and Blackrock  Survey was drawn by Colin Boothroyd.  Inked onto draughting film the original is 2.5m long and very difficult to fully appreciate at this scale.  The survey was drawn using traditional methods but successfully represents  a highly complex multi level system.  It is a masterpiece of the cave surveyors art.  (click to enlarge)

The 1989 Clearwater and Blackrock survey. Survey © Mulu Caves Project

The 2009 Clearwater System Graphic uses a unique approach to cave survey representation.  Hugh St Lawrence created the composite from the 1989 Clearwater survey and the 2009 Whiterock  survey.  Each major elevation is colour coded demonstrating the principal passage development throughout the system.  (Click to enlarge)

The 2009 Clearwater System Graphic. Survey © Mulu Caves Project