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Estimate: Unfolding Using the Unfolding screen of the Estimate dialog. |
Estimate - Unfolding Screen
To access this dialog:
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Type 'ESTIMATE' in the Command window. In the Estimate dialog, click Next to show the Unfolding tab.
The Unfolding tab contains the Unfold sub-tab that comprises the following fields. If you select the Unfold Wizard parameter file in the Files tab of the Estimate dialog, and click Apply, then the relevant default values are automatically added to the following fields.
Field Details:
Unfold Strings File: allows you to select the strings file produced by the unfolding operation. By default, the validated and converted HW and FW strings file produced by the Unfold Wizard is selected (STR09_HWFW_VALID).
Unfold strings file: the validated and converted HW and FW strings file produced by theUnfold Wizard.
Fields: allows you to select fields from the file specified in the Unfold strings file box to represent the section identifier, boundary (HW/FW) id., within section tag and between section tag.
SECTION: the field containing the section identifier. This is a numeric value identifying each section.
BOUNDARY: the field containing the boundary (HW/FW) identifier. This is a numeric value that identifies the hangingwall and footwall strings. A value of '1' represents the hangingwall strings, and a value of '2' represents the footwall strings.
WSTAG: the field containing thewithin section tag identifier. This is a numeric value identifying each within section tag.
BSTAG: the field containing thebetween section tag identifier. This is a numeric value identifying each between section tag.
Parameters: by default, the values that were specified in the Unfold tab of the Unfold Wizard are selected.
Link Mode: allows you to specify whether within section or between section tag strings are used.
Unfolded Coordinate Type: allows you to specify the scaling applied to each axis in the Unfolded Coordinate System (UCS). This defines the relative position of the associated unfolded data for each axis. The following options can be selected:
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- Normalised (between 0 and 1): a
normalised coordinate uses a value between '0' and '1' to
represent a position on the applicable axis. This is the distance
as a proportion of the total distance along the axis, as shown
in the example below.
- Adjusted (normalised * av. length): the
normalised coordinate value multiplied by the average length
of the applicable axis, based on data from all sections. This
is shown in the example below.
- True Length: the true length coordinate is the distance from the origin of the applicable axis in the Unfolded Coordinate System, measured in standard World Coordinate System units, as shown in the example below.
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- For UCSA, this provides a measure of width, or true width.
- For UCSB, this is the distance along the dip-direction of the strata.
- For UCSC, `adjusted' units are used by default. This
is generally satisfactory as the UCSC coordinate should
correspond to the direction of the fold axis.
- Normalised (between 0 and 1): a
normalised coordinate uses a value between '0' and '1' to
represent a position on the applicable axis. This is the distance
as a proportion of the total distance along the axis, as shown
in the example below.
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World X / World Y / World Z Coordinate: the value on an axis in the Unfolded Coordinate System corresponds to one of the standard (X,Y,Z) axes in the World Coordinate System.
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UCSA type (across strike): select the scaling type applied to the A axis in the Unfolded Coordinate System (UCS).
UCSB type (down dip): select the scaling type applied to the B axis in the Unfolded Coordinate System (UCS).
UCSC type (along strike): select the scaling type applied to the C axis in the Unfolded Coordinate System (UCS).
Plane: the plane in which the sections were defined. By default, this is perpendicular to the plane of the strike string: if the strike string is defined in a horizontal plane then Vertical section is selected; if the Strike String is defined in a vertical plane, then Horizontal plane is selected.
Tolerance: a value, defined as a proportion of the UCSA width, which allows samples which are just outside the hangingwall or footwall to be unfolded.
UCSA Limit: if a Tolerance value greater than ‘0’ is set, then one of the following conditions is applied to the UCSA value. These options are defined in terms of the Normalised mode.
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1: No restriction on UCSA: values can be less than ‘0’, or greater than ‘1’.
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2: UCSA <= 1: values calculated as greater than ‘1’ are reset to '1'.
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3: UCSA >= 0: values calculated as less than '0' are reset to '0'.
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4: UCSA >= 0 and UCSA <=1: values calculated as less than '0' are reset to '0', and values calculated as greater than '1' are reset to '1'.
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UCSB Originn Tag Number: allows you to specify the origin for the UCSB coordinate by selecting a Between Section string.
Hangingwall BOUNDARY value: allows you to specify the numeric value that identifies the hangingwall string. By default, this value is '1'.
Footwall BOUNDARY value: allows you to specify the numeric value that identifies the footwall string. By default, this value is '2'.
