DAELLIPS Process

To access this process:

• Model ribbon >> Dynamic Anisotropy >> Validate.
• View the Find Command screen, select DAELLIPS and click Run.
• Enter "DAELLIPS" into the Command Line and press <ENTER>.

See this process in the Command Table.

Process Overview

Create ellipsoids from dynamic anisotropy points or model.

Input is either a points or a block model file (not both).

Typically, points data will be created by the ANISOANG process, although it can be from other sources. An input points file must contain coordinate fields (XPT/YPT/ZPT) and at least one angle field. Up to three angle fields can be specified, representing the dip direction (DIPDIR), dip (DIP) and roll (ROLL). Providing at least one directional field is set, the remaining orientations can be static and specified using the @DIPDIR, @DIP and/or @ROLL field.

Model data will typically be as produced by anisotropic modelling functions. As with points, each cell record must contain at least one angle field.

Ellipsoid centroids, derived from either &POINTS or &MODEL can be optionally declustered (multiple options) and 3 radii are specified to determine the final ellipsoid shape. @XGRID, @YGRID and @ZGRID parameters will define the declustering grid (if declustering is applied). The original of the grid can be specified (@XORIG, @YORIG and @ZORIG) if the input data is of the points type.

You can also choose (@CENTRE) as to how the ellipsoid centroid is positioned, either at the point or subcell centroid (0) or on the centre of the grid or the parent cell within which the point lies.

In all cases, output will be a data file of the ellipsoids data type, and can be loaded into a 3D view to visualize ellipsoid location(s) and orientation(s).

Input Files

Name	Description	I/O Status	Required	Type
POINTS	Angle data in points format created by ANISOANG. It must include XPT, YPT, ZPT and at least one angle field. Either a POINTS or a MODEL file must be selected but not both.	Input	Yes, if &MODEL not specified	Points
MODEL	Angle data in model format created during dynamic anisotropy modelling. It must include at least one angle field. Either a POINTS or a MODEL file must be selected but not both.	Input	Yes, if &POINTS not specified	Block Model

Output Files

Name	I/O Status	Required	Type	Description
ELLIPSES	Output	Yes	Ellipsoid	Output ellipsoids. Ellipsoids to be displayed in the 3D Window.

Fields

Name	Description	Source	Required	Type	Default
DIPDIR	A field in the POINTS or MODEL file that includes the dip direction angle.	MODEL	No	Undefined	Undefined
DIP	A field in the POINTS or MODEL file that includes the dip angle.	MODEL	No	Undefined	Undefined
ROLL	A field in the POINTS or MODEL file that includes the roll angle.	MODEL	No	Undefined	Undefined

Parameters

Name	Description	Required	Default	Range	Values
DECLUST	Flag to select declustering option. Default (0). 0:do not use declustering. 1:random selection within each grid cell (different selection for each run). 2: pseudo random selection within each grid cell (repeatable).. 3: nearest to grid centre.	No	Yes	0,3	0,1,2,3
RAD1/2/3	Ellipsoid radius in X/Y/Z direction.	Yes	10	Numeric	Undefined
FACTOR	Dividing factor for adjusting size of RAD1, RAD2 and RAD3.	Yes	1	1	1
DIPDIR/DIP/ROLL	Dip direction, dip or roll angle. Only required if there is no corresponding DIPDIR, DIP or ROLL field specified.	No if DECLUST=0, otherwise yes	0	Numeric	Undefined
X/Y/ZGRID	Size of declustering grid in X/Y/Z direction. Not required if @DECLUST=0 or input file is MODEL.	No if DECLUST=0, otherwise yes	10	Numeric	Undefined
X/Y/ZORIG	X/Y/Z coordinate of grid origin. Not required if @DECLUST=0 or input file is MODEL. Default (0).	No if DECLUST=0, otherwise yes	0	Numeric	Undefined
CENTRE	Flag to define where the ellipsoid should be located. Only required if @DECLUST > 0. 0: centre the ellipsoid on the coordinates of the point or subcell centre. 1: centre the ellipsoid on the centre of the grid or parent cell within which the point lies. .	No if DECLUST=0, otherwise yes	1	0,1	0,1