| OpendTect User Documentation version 3.2 |
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Name
Reference shift -- Attribute that moves the extraction position in 3D space
Description
The Input attribute is extracted at the shifted position. The original reference (extraction) point has inline/crossline co-ordinates (0,0). Relative number 1 means the next inline or crossline, respectively. In case of input of a 2D attribute, the inline/crossline shift is replaced by a single trace shift. The vertical shift is specified in milliseconds using the Time option. Besides, there is also the option to use Steering while calculating the Reference shift.
Shifting the reference position is a form of directivity that is useful in multi-attribute analysis. For example, to highlight flat spots, one may consider attributes that are extracted in a horizontally aligned window.