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uniDEM Shader Options

uniDEM supports multiple shaded relief capabilities that can be modified to view a DEM in different ways. These settings are unique to each data view (window).

Mode

The shaded relief of any DEM set can be colorized using the following methods:

Colormaps are applied based on the Color Scheme and Scope settings.

Default shortcut: none

Color Scheme

The shaded relief Color Scheme defines the colorization that is applied to the selected Mode and supports the following color schemes:

Colormaps are applied based on the Color Scheme and Scope settings.

Default shortcut: none

No Color Scheme
Jet
Hue
Heat
Gray
Topo
Classic
Terrain
Alien
Random

Scope

The shaded relief's Color Scheme range is defined by the selected mode:

Default shortcut: none

Scale

Defines the amount of contrast to apply to the results of shaded relief calculation. A higher value provides more contrast.

Default shortcut: none

Lightness

Defines the brightness of the shaded relief presentation.

Default shortcut: none

Saturation

Defines how strongly the selected Color Scheme is applied to the shaded relief.

Saturation is inactive when the Shader Mode is None.

Default shortcut: none

Sun Dir.

The shaded relief Sun Direction defines the simulated direction of the sun. It can be defined in 8 directions and None which indicated no sun and therefore will present only the Shader - Color Scheme if the Shader - Mode is not None.

Default shortcut: none

Slope Dir.

The shaded relief Slope Direction defines the simulated direction in which to calculate the slope when the Shader - Mode is Slope or Gradient. It can be defined in 8 directions and None which indicated no sun and therefore will present only the Shader - Color Scheme if the Shader - Mode is not None.

Default shortcut: none

Sensitivity

The shaded relief Sensitivity is used to exaggerate the changes in the shaded relief, slope or gradient results.

Default shortcut: none

Min.

The shaded relief Minimum is used when the Shader - Scope is sent to Custom. The Color Scheme will use the Minimum value when assigning the color.

Default shortcut: none

Max.

The shaded relief Maximum is used when the Shader - Scope is sent to Custom. The Color Scheme will use the Maximum value when assigning the color.

Default shortcut: none

Calibrate

The shaded relief Calibrate function is used to automatically select the Minimum and Maximum elevation values from all selected pixels.
When Calibrate is selected the Shader - Scope will change by default to Custom.

Default shortcut: B

±N

The shaded relief's Color Scheme range can be quickly set to a range about 0 by pressing ±N. This feature is helpful when comparing the difference between two DEMs. When the range is entered on an active view with a colored shaded relief the range will be contrained from -N to N.

Default shortcut: F12

Up

The shaded relief's Color Scheme range can be quickly modified using the Up button. This feature can be used to focus on regions of a particular elevation band. For example reviewing regions of elevation in 10m increments. To use:

  1. Set the Min and Max of a colorized shaded relief to 0 and 10.
  2. Press Up and the range will change from 10-20m. The range will increase by the current difference between Max and Min.

Default shortcut: Page Up

Down

The shaded relief's Color Scheme range can be quickly modified using the Down button. This feature can be used to focus on regions of a particular elevation band. For example reviewing regions of elevation in 10m increments. To use:

  1. Set the Min and Max of a colorized shaded relief to 0 and 10.
  2. Press Down and the range will change from -10 to 0m. The range will decrease by the current difference between Max and Min.

Default shortcut: Page Down