relief lab
Light
These parameters control the light-source geometry and
intensity under the Blinn-Phong lighting model.
Type
A tracking light follows the observer, with its geometry
defined in the plane perpendicular to the direction of the
view. A
geographic light follows the map center, with its geometry
defined in the local north-east-down reference frame.
Azimuth
Elevation
Ambient intensity
Light colors
Diffuse
Specular
Shading
Combined shading computes the diffuse shading coefficient
from a geometric average of the three available shading
methods.
Haze
Haze uses a simplified physical atmospheric scattering
model. Optionally, visibility can be made a function of
distance to the map center, and edge of atmosphere may be
moved away from the viewer.
Make visibility a multiple of distance to map center. This
can help make atmospheric effects more pronounced as you
move closer to the object of interest, leading to better
visual hierarchy.
Make atmosphere start at a distance, derived from how far
the viewer is from the center. This ensures the center of
the view and the foreground stay clear of haze.
Vertical exaggeration may be expressed as a power-law
function of the scale denominator, as a linear function of
elevation, or both. When both are used, the final vertical
exaggeration is determined as the product of the two
contributing factors.
Vertical exaggeration factor, depending on scale
denominator. Note the logarithmic scale.
Computed map scale at map center
--
Scale-based VE factor
--
Vertical exaggeration factor, depending on elevation in
meters above sea level.
Device PPI
The true scale at map center is determined by the device
physical CSS PPI. Set it accordingly for more accurate
scale-based vertical exaggeration settings and scale
readings.
Rendering