This process computes the curvature for a volume based upon a dip field. It can highlight subtle flexures and faults missed by other similarity based tools (incoherence, semblance, etc.). See Insight's Structural Curvature fundamentals for more details on curvature and how to apply it.
Several different curvature properties can be output by the process:
- Max Curvature: Calculate the highest magnitude curvature for each surface point.
- Min Curvature: Calculate the curvature perpendicular to the max curvature.
- Most Negative Curvature: Show the most negative curvature value for each point.
- Most Positive Curvature: Show the most positive curvature value for each point.
- Dip Curvature: Calculate the curvature in the direction of maximum dip.
- Strike Curvature: Show the curvature perpendicular to the direction of maximum dip.
Shape Curvature: The shape described by the curvature in the range [-1, +1], where:
- +1 describes a dome
- +0.5 describes a ridge
- 0 describes a flat plane or a saddle
- -0.5 describes a channel
- -1 describes a bowl
Calculate Curvature for a 3D volume
- The Curvature attributes are calculated from a dip field on a 3D volume.
- First create a Dip Field for your volume (see the Dip Field process for details).
- Add a new Curvature process via the Add button and select it.
- Choose the Dip Field to analyse.
Note: Curvature cannot be calculated from a 2D dip field.
- In the Output attributes panel, select the curvature attribute you are interested in.
- Each selected attribute will create a new output volume in the Volume tab.
Note: Calculating dip for a large volume can be slow! Consider exporting dip results to disk to improve the speed of curvature calculations
View Curvature for 3D volume
- Open Map View via Control Panel >> View >> New Map View.
- Select or search the Curvature attributes from the Volume selector.
Note: Use shortcut keys F5 or F6 to adjust the colour temparature of the Curvature.