Display the Dataflow window (F7).
Display a view showing the platform.
Click the Platform icon, 
.
Press F8
-OR-
Click Platform Properties on the Shortcut (right-click) menu
-OR-
Click Platform Properties on the Object menu
The Platform Properties dialog box is used to enter the properties of a platform.
Note: Platform properties affect transducer geometry (among other things). If you do not have a clear understanding of transducer geometry it is recommended that you read the About transducer geometry page before changing any settings on this dialog box.
To display the Platform Properties dialog box:
Display the Dataflow window (F7).
Display a view showing the platform.
Click the Platform icon, .
Press F8
-OR-
Click Platform Properties on the Shortcut (right-click) menu
-OR-
Click Platform Properties on the Object menu
The General page is used to enter general information about the platform.
|
Settings |
Description |
|
Name |
The name of the platform |
|
Notes |
Additional information about the platform |
The Position page is used to enter the details that define the type and position of the platform.
The Platform type box is used to specify the type of platform. You can select the following platform types:
Position determined by GPS for a mobile platform (for example, a boat), or
Fixed for a non-mobile platform.
This section is only displayed if Position determined by GPS fixes is currently selected as the Platform type.
The Position source box is used to select the position variable from which the platform's position will be calculated. In addition, along-track display cruise tracks for acoustic variables that are linked to this platform will be based on the selected position variable.
Note: Position source can default to a raw position variable or a virtual position variable. In some cases the position variable is one that was most recently used.
This section is only displayed if Position determined by GPS fixes is currently selected as the Platform type.
The settings in this section are used to specify the location of the GPS antenna on the platform relative to a system reference point (the same reference point from which water level, and transducer location is referenced, see About transducer geometry for more information).
|
Settings |
Description |
|
X (alongship) (m) |
The distance of the GPS antenna from the reference point on the alongship axis (positive towards the bow, negative towards the stern) |
|
Y (athwartship) (m) |
The distance of the GPS antenna from the reference point on the athwartship axis (positive towards starboard, negative towards port) |
|
Z (vertical) (m) |
The distance of the GPS antenna from the reference point on the vertical axis (positive downwards, negative upwards) |
This section is only displayed if Fixed is currently selected as the Platform type.
The settings in this section are used to specify the location of the system reference point of the platform, i.e. the point to which depth, transducer location, etc are referenced.
|
Settings |
Description |
|
Latitude / Northing (degrees / meters) |
The latitude or northing of the system reference point Notes:
See About mapping and projections for more information. |
|
Longitude / Easting (degrees / meters) |
The longitude or easting of the system reference point. Notes:
See About mapping and projections for more information. |
|
Altitude (m) |
The altitude (m) of the system reference point |
Note: Acceptable settings for this dialog box depend upon the Map projection selected in Echoview (on the Mapping page of the EV File Properties dialog box).
The Z co-ordinate of the water level (m) box is used to set the distance in meters (positive downwards, negative upwards) from a system reference point to the water level.
This section is only displayed if Position determined by GPS fixes is currently selected as the Platform type.
The Distance source box is used to select the distance variable (e.g. vessel log) that will be associated with the platform. The selected variables will be associated with all acoustic variables that are linked to this platform and may:
be used as the source of distance for time/distance grids,
be used as the source of distance for schools detection, and
be included in exported data, see About analysis variables.
The Attitude page is used to select attitude variables that are associated with a platform.
|
Setting |
Description |
||||||||
|
Heading source |
Is used to select the source of heading data. You can choose one of the following:
See: About heading data for further details. |
Notes:
Future versions of Echoview may also support yaw and heave sources.
Roll can be corrected for in Echoview, but this is not applied to the platform. It is applied to variables directly and makes specific limiting assumptions. See About roll data for further information.
Pitch can be corrected for in Echoview, but this is not applied to the platform. It is applied to variables directly and makes specific limiting assumptions. See About pitch data for further information.