Analysis Tab (Surface Style Dialog Box)

Use this tab to specify the display parameters for the surface analysis displays that have common view properties.

Directions

Specifies the display properties for directional (aspect) analysis. Renders surface triangles according to the direction that they face.

Group By

Specifies the direction ranges creation properties:

• Equal Interval: Divides the data into the specified number of ranges from the minimum value to the maximum. Also known as equal step, this method often over-generalizes the data, with large sets of values in one group while others have a sparse set of values.
• Quantile: Divides the data such that the specified number of ranges contains an equal number of values. Also known as equal count, this method is most appropriate where the data values are linear (equally distributed).
• Standard Deviation: Calculates and divides the data based on how far data values differ from the arithmetic mean. This method is most effective when the data approximates a normal distribution (bell-shaped curve), and because of this curve preference, it is best used with an even number of ranges. Standard deviations are often used to highlight how far above or below a specific value is in relation to the mean value.

Number of Ranges

Specifies the number of ranges to be used.

Range Precision

Specifies the range precision value.

Display Type

Specifies the element type to be drawn within the analysis view:

• 3D Faces: Generates a surface analysis display containing 3D Faces. Useful when viewing the object in 3D. If you use the AutoCAD Explode command, the analysis view explodes to 3D Face elements.
• 2D Solid: Generates a surface analysis display containing 2D Solid hatching. Useful when viewing the object in 2D. If you use the AutoCAD Explode command, the analysis view explodes to Solid elements.
• Hatch Solid: Generates hatching within polygons containing triangle faces that match the criteria for a specific range. Useful when viewing the object in 2D. If you use the AutoCAD Explode command, the analysis view explodes to Hatch elements.
• Mesh: Generates a surface analysis display containing a mesh. Useful when viewing the object in 3D.

Scheme

Specifies the color scheme for the range.

Legend Style

Specifies the default analysis table (legend) style. Click to select a style.

Directions Display Mode

Specifies watersheds display properties:

• Use Surface Level: Displays the directions at their actual level values.
• Flatten Levels: Flattens or projects the directions to the level value specified by the Flatten Directions To Level property.
• Exaggerate Level: Scales the directions by the factor specified in the Exaggerate Directions By Scale Factor property.

Flatten Directions To Level

Specifies the level used to flatten the directions display. Available only when you set the Directions Display Mode to Flatten Levels.

Exaggerate Directions By Scale Factor

Specifies the scale factor used to exaggerate the directions display. Available only when you set the Directions Display Mode to Exaggerate Level.

Levels

Specifies the display properties for level banding analysis. Renders surface triangles within a level range.

Note: Levels analysis display properties are the same as the Directions properties.

Slopes

Specifies the display properties for slope analysis. Renders surface triangles within a slope range.

Note: Slopes analysis display properties are the same as the Directions properties.

Slope Arrows

Used for slope direction analysis. Places a slope directional arrow at each triangle centroid. Arrow color is based on the color assigned to a slope range (similar to slope analysis).

Uses the same display properties as the Directions properties, with the following additional properties:

Arrow Type

Specifies the type of arrow to use:

• Filled:
• Closed:
• Open:
• Double:

Arrow Length

Specifies the length of the slope arrow that is displayed in a Slope Arrows surface analysis view.