#Horizontal shift manual#

In the associated example we can see four fiducial point pairs generated after four subsequent alignments.

#Horizontal shift manual#

As you pick, the points are also added to the Point Table.Ĭontour matching will display two square icons with a connecting line that indicates the start and end location of the manual contour shift. In this example, the user chose a simple bump that appeared in both surfaces. The panels below show how the icons appear as you start and finish your pick on a feature. You can start a pick pair in either surface view. As fiducial pairs are registered by clicking on like features or manually aligning contours, symbolic color coded icons appear that represent the location of each pick.įeature matching will display a circular icon that has a 'tail' that extends to the corresponding fiducial position in the opposite surface view. The average horizontal offset is computed by averaging the horizontal displacement of all fiducial pairs in the Point Table. When satisfied, the user can then choose to apply a shift to the raw sonar files in the dynamic surface to minimise this difference.

Qimera collects a table of these differences as the user moves around the surface adding more and more pairs, automatically computing the average difference. Feature matching allows the user to select a number of corresponding point pairs on each surface while contour matching allows the user to visually align two contours within a given area. The Static Horizontal Shift Tool allows a user to align a Dynamic Surface from a survey to another reference surface using either point selection feature matching or contour matching.

Static Horizontal Shift Tool option from the Tools→Dynamic Surface Shifts menu in the Main Menu bar.