Presentation library

Conditional Symbology Procedure SOUNDG03

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Loop for each point of the 3D edge spatial object
DEPTH_VALUE Input parameter Sounding Symbols List

12.2.16 Conditional Symbology Procedure SOUNDG03

Applies to: S-57 Object Class "soundings" (SOUNDG)
Spatial Object(s): 3D Edge (the array of points with three coordinates)
ECDIS Parameter(s):
Defaults: Display Priority given by look-up table;

OVERRADAR priority given by look-up table;

Display Category given by look-up table;

Viewing group given by look-up table.

Remarks: In S-57 soundings are elements of sounding arrays rather than individual objects. Thus this conditional symbology procedure examines each sounding of a sounding array one by one. To symbolize the depth values it calls the procedure SNDFRM04 which in turn translates the depth values into a set of symbols to be shown at the soundings position.
Figure 33 SOUNDG03 conditional symbology procedure

Entry point	The calling object SOUNDG
Get the calling object	Get the object which is calling this procedure.
Loop for each point of the 3D edge spatial object	Perform the loop for each spot sounding that is point (vertex) of the 3D edge spatial object. Setup - Get Object's Sounding Array; The Calling Object. Test - While there is unprocessed point of Sounding Array Body - Symbolize point of the Sounding Array
Exit procedure	Symbolization is finished

Figure 34 Loop for each Spot Sounding

LOOP entry point	For each sounding that is a part of the object's sounding array, perform this loop
Set DEPTH_VALUE	Get the depth value of the spot sounding from 3D edge vertex of the spatial object that is currently examined and set it to the local variable DEPTH_VALUE.
SNDFRM04 (DEPTH_VALUE)	Perform the symbology sub-procedure 'SNDFRM04 to select symbols to draw the depth value. Pass the value of the local variable DEPTH_VALUE, the calling object and attributes of spatial objects on to 'SNDFRM04'. A list of symbols is returned
DEPTH_VALUE	Input parameter
Sounding Symbols List	Output parameter
Draw Sounding Symbol(s)	Draw the symbols which were selected by 'SNDFRM04'. Place them at the position which is given by the currently examined spot sounding.
continue	Go to the next point of the 3D Edge spatial object.

Directory: iho pubs -> draft pubs -> PresLib e4.0.0 -> Part I

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