Shaded Relief Production
Sun angle and altitude examples from Tom Patterson, NPS
Basics of
calculation:
Calculate intensity of
light at each point on surface: I
Lambert's Cosine law:
I = cosine(angle of
incidence)
Angle of incidence: angle
between illumination and slope normal
Created with DEM (digital elevation model)
more examples from Tom Patterson:
DEM quality
Registry
Aerial
perspective
Imhof
by hand
Using resolution
Fine tuning
