CDUrGetGriddingAzimuthToMinimizePadding Method

Return the gridding azimuth (degrees CW from north) that minimizes padding.

Namespace: Geosoft.Desktop.GXNet
Assembly: geosoft.desktop.gxnet (in geosoft.desktop.gxnet.dll) Version: 2024.2.0.25

Syntax

C++

Copy

public static double rGetGriddingAzimuthToMinimizePadding(
	CDB db,
	int xCh,
	int yCh,
	int mCh,
	ref double x1,
	ref double y1,
	ref double x2,
	ref double y2,
	ref double x3,
	ref double y3,
	ref double x4,
	ref double y4
)

public static double rGetGriddingAzimuthToMinimizePadding(
	CDB db,
	int xCh,
	int yCh,
	int mCh,
	ref double x1,
	ref double y1,
	ref double x2,
	ref double y2,
	ref double x3,
	ref double y3,
	ref double x4,
	ref double y4
)

Public Shared Function rGetGriddingAzimuthToMinimizePadding ( 
	db As CDB,
	xCh As Integer,
	yCh As Integer,
	mCh As Integer,
	ByRef x1 As Double,
	ByRef y1 As Double,
	ByRef x2 As Double,
	ByRef y2 As Double,
	ByRef x3 As Double,
	ByRef y3 As Double,
	ByRef x4 As Double,
	ByRef y4 As Double
) As Double

Public Shared Function rGetGriddingAzimuthToMinimizePadding ( 
	db As CDB,
	xCh As Integer,
	yCh As Integer,
	mCh As Integer,
	ByRef x1 As Double,
	ByRef y1 As Double,
	ByRef x2 As Double,
	ByRef y2 As Double,
	ByRef x3 As Double,
	ByRef y3 As Double,
	ByRef x4 As Double,
	ByRef y4 As Double
) As Double

public:
static double rGetGriddingAzimuthToMinimizePadding(
	CDB^ db, 
	int xCh, 
	int yCh, 
	int mCh, 
	double% x1, 
	double% y1, 
	double% x2, 
	double% y2, 
	double% x3, 
	double% y3, 
	double% x4, 
	double% y4
)

public:
static double rGetGriddingAzimuthToMinimizePadding(
	CDB^ db, 
	int xCh, 
	int yCh, 
	int mCh, 
	double% x1, 
	double% y1, 
	double% x2, 
	double% y2, 
	double% x3, 
	double% y3, 
	double% x4, 
	double% y4
)

static member rGetGriddingAzimuthToMinimizePadding : 
        db : CDB * 
        xCh : int * 
        yCh : int * 
        mCh : int * 
        x1 : float byref * 
        y1 : float byref * 
        x2 : float byref * 
        y2 : float byref * 
        x3 : float byref * 
        y3 : float byref * 
        x4 : float byref * 
        y4 : float byref -> float 


static member rGetGriddingAzimuthToMinimizePadding : 
        db : CDB * 
        xCh : int * 
        yCh : int * 
        mCh : int * 
        x1 : float byref * 
        y1 : float byref * 
        x2 : float byref * 
        y2 : float byref * 
        x3 : float byref * 
        y3 : float byref * 
        x4 : float byref * 
        y4 : float byref -> float

Parameters

db: Type: GeoEngine.Core.GXNetCDB
Database
xCh: Type: SystemInt32
X channel [<define>DB_LOCK_READONLY</define>]
yCh: Type: SystemInt32
Y channel [<define>DB_LOCK_READONLY</define>]
mCh: Type: SystemInt32
Data or mask channel [<define>DB_LOCK_READONLY</define>]
x1: Type: SystemDouble
Returned Corner 1 - X
y1: Type: SystemDouble
Returned Corner 1 - Y
x2: Type: SystemDouble
Returned Corner 2 - X
y2: Type: SystemDouble
Returned Corner 2 - Y
x3: Type: SystemDouble
Returned Corner 3 - X
y3: Type: SystemDouble
Returned Corner 3 - Y
x4: Type: SystemDouble
Returned Corner 4 - X
y4: Type: SystemDouble
Returned Corner 4 - Y

Return Value

Type: Double

Remarks

Especially if the survey lines do not run N-S or E-W, gridding parallel to the XY axes results in up to half the gridding area being dummies (padding), which is not only inefficient, but affects processes like filtering. This algorithm determines the data rotation required such that the gridding extents rectangle fit around the data minimizes the amount of padding. The result is good to the nearest degree. The corner points are returned and include a buffer around the edge equal to 1% of the maximum height/width. The returned azimuth will be in the range 0 to 89. Operates on all selected lines.

Reference

CDU Class

Geosoft.Desktop.GXNet Namespace

CDUAddLanguageSpecificTextSet("LST707F2C96_0?cpp=::|nu=.");rGetGriddingAzimuthToMinimizePadding Method

Parameters

Return Value

Reference

CDUrGetGriddingAzimuthToMinimizePadding Method