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Thematic Display Dialog, Display Tab

Contains controls to set the display of the thematic displays.

Display Mode (Applicable when the thematic display style is Slope) Sets the unit of display values:
  • Angle — The values displayed are the angles between a given facet and a horizontal plane. displayed in angle
  • Percent — The values displayed are rise or run slopes displayed as percentages.
Axis (Applicable when the thematic display style is Height) Sets the coordinate X, Y, or Z from which the values for each point are derived.
Azimuth (Applicable when the thematic display style is Hill Shade) Sets the angle made with the Y axis.
Altitude (Applicable when the thematic display style is Hill Shade) Sets the angle made with the XY plane.
Stepped Display This setting has following options:
  • Off (Smooth) — produces a smooth, unstepped gradient.

  • Accurate — produces a stepped display by clipping the geometry to each individual color band. This produces an accurate display at the expense of slightly increased processing time. The Accurate stepped display can produce an excellent result when the Visible Edges display setting in the Display Styles dialog is turned on to enable the display of the edges between bands. In this case it is desirable to disable the display of other edges by selecting the All Invisible Edge Override setting.

  • Isolines — displays only isolines. When displaying only isolines it may be desirable to increase the value of Number of Legend Entries in the Legend tab.

  • Fast — produces a stepped display using an optimized display technique that is extremely efficient, but may produce some blurring at the boundary between color bands.

  • Fast + Isolines — displays isolines between the color bands in a similar manner to enabling edge display with the Accurate method, but the resulting display is not as precise.

Edge Override This option is applicable only when Visible Edge setting is enabled for the display styles in the Display Styles dialog. In a typical mesh, the edges between facets are either visible or hidden. Typically smooth edges are hidden to avoid cluttering the display. Analysis applications such as the Solar Exposure Calculator may subdivide faces to improve accuracy but hide the edges between these subdivisions. This setting has following options:
  • None — only the normally visible edges are displayed.
  • All Visible — all edges, including hidden edges are displayed.
  • All Invisible — no edges are displayed.

Left — Edge Override is set to All Visible. Right — Edge Override is set to All Invisible

You can achieve an uncluttered, crisp stepped display by turning off the mesh edges with the All Invisible option, setting the Stepped Display to Accurate and turning on Visible Edges setting.

Display Legend Controls whether a legend is displayed in the view. The settings to control the legend display are available on the Legend tab.
Transparent Margins If on, the values beyond the thematic display range are displayed as transparent and margin color is ignored. If Stepped Display is set to Accurate or Isolines and if Transparent Margin is on, the margins are not displayed.
Color scheme Allows selection of the color gradient from a set of predefined schemes. Following schemes are available:
  • Red-Blue
  • Blue-Red
  • Monochrome
  • Topographic
  • Sea-Mountain
  • Custom

The Blue-Red and Red-Blue schemes produce a classic full color gradient. The Topographic and Sea-Mountain are typically used for height display. You can also create custom color schemes by selecting the custom option and changing the display gradient.

Color scheme: Red-Blue

Color scheme: Topographic

Display gradient The gradient allows you to customize the thematic display color gradient. Click and drag the upper buttons to move the color keys. Click the bottom buttons to adjust the key colors. Double clicking on the color bar will insert new color keys. In the example below the right-most key has been dragged to the right in order to move the "snow line" closer to the peak of the mountain.

You can delete a color key by any of the following methods:

  • Select the color key and press <Delete>.
  • Select the color key and press <Backspace>.
  • Select the color key and drag it in either end of the gradient.

Controlling range The check box and text fields below the gradient can be used to specify the thematic display range. If the check boxes are not selected then the range is calculated automatically. If the check boxes are selected then the text fields are enabled and you can fix the ranges by entering values in the text fields.