Mayne IslandSteep Slopes Hazard Map

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Steep Slopes Hazard Map
Mayne Island
Moderate Hazard (22.5 - 45 degrees)
High Hazard ( > 45 degrees)
Property Boundaries
Low Hazard (15 - 22.5 degrees)
Supporting Data and Limitations 
This Mayne Island Steep Slopes Hazard Map has been created using a slope gradient generated from a digital elevation model 
(DEM). A DEM is a digital representation of ground surface topography, or topographic relief, built using air borne LiDAR (Light 
Detection And Ranging) optical remote sensing technology. The Mayne Island DEM was derived from LiDAR data collected at an 
average  density  of  2.7  metres,    with  +/-  0.5  m  vertical  and  horizontal  accuracy.  In  addition,  classified  Steep  Slopes  Hazard  
areas  smaller  than  36  square  metres  have  been  filtered  out  of  this  map,  the  resolution  of  these  areas  having  been  deemed  
insignificant to the potential geological hazard.   
The  rationale  and  support  for  the  classification  of  Steep  Slopes  Hazard  designations  is  contained  in  the  recommendations  of  
reports  prepared  for  the  Islands  Trust  by  Shane  Moore,  P.  Geo.,  C.N.  Ryzuk  and  Associates.  Copies  of  the  reports  can  be  
obtained by contacting the offices of the Islands  Trust. 
01230.5
Kilometers

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