Photometric Grid Properties

The photometric grid properties can be changed in the Object Info palette.

 

Parameter	Description
Z	Sets the elevation value of the grid; illumination values vary depending on the elevation
Show Elevation	Select to display the grid elevation along with the photometric values
Show Zero	Select to display elevation values of zero
Calculate using only visible beams	Select to determine the photometric values based on only instruments with Draw Beam selected; this reduces calculation time
Use Threshold Settings	Select to display the grid with colors that correspond to the specified threshold ranges
Lower Threshold	Specify the illumination value at the lower end of the range; values below this level are displayed in green, and values between the lower and upper threshold are displayed in tan
Upper Threshold	Specify the illumination value at the upper end of the range; values above this level are displayed in blue
Grid Spacing X	Specifies the spacing of photometric values in the X direction
Grid Spacing Y	Specifies the spacing of photometric values in the Y direction
Grid Width X	Specifies the length of the grid in the X direction
Grid Width Y	Specifies the length of the grid in the Y direction
Reset	Refreshes the grid display after changes have been made to the lighting conditions