Gemini Software Operation
Gemini 720is Imaging Sonar
Document: 0703-SOM-00002, Issue: 7
46
© Tritech International Ltd.
5.2.6. Distance Marker
The
Distance Marker
provides a mechanism for measuring the distance between two
points in the Gemini data view. This is similar to the
Measurement Tool
but provides
additional options that allow it to be used as a more permanent measurement.
Enable the feature by clicking the
Enable Distance Marker
button. This will draw the
Distance Marker
as a horizontal line and the
Set Point
as a small circle in the Gemini
data view.
For both the
Distance Marker and Set Point
, the corresponding colour selector may
be used to distinguish the markers from the head image. Click on each colour box to open a
colour selection dialogue. Additionally, for each marker, the Cartesian coordinate is displayed
in the
Distance Marker
panel. The Distance Marker line width can be set by entering a
value into the
Marker Width
field.
In the Gemini data view, each marker can be clicked and dragged to a new position. The
distance measurement will continuously update and reflect the distance between the two
markers.
Note
In order to click and drag the markers the click must be within the head image.
For example, if a marker is at location (0, 0) the clickable area is fairly small and
care must be taken to click the correct area. In this case, the
Distance Marker
line may reach past the head image boundary and would only be clickable where
it overlaps the head image.
The distance between the
Distance Marker and Set Point
is displayed in the bottom
right of the Gemini data view (see image below). The displayed values are calculated as:
Distance (X, Y) = (Distance Marker - Set Point)
