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CVVUOffsetCorrect Method
Correct locations based on heading and fixed offset.

Available since Oasis montaj version: 5.0.8
License: Available to anyone with an Oasis Montaj license.  

Namespace: Geosoft.Desktop.GXNet
Assembly: geosoft.desktop.gxnet (in geosoft.desktop.gxnet.dll)
Notes
In many applications, measurements are taken with an instrument which is towed behind, or pushed ahead of where the locations are recorded. Use this function to estimate the actual location of the instrument. The method determines the heading along the line, using a "thinned" version of the line. The degree of thinning is based on the size of the offset; the larger the offset, the greater the distance between sample locations used to construct the thinned lined used for determining headings. The thinned line is splined at a frequency greater than the sample frequency, and the heading at any given point is determined from the vector formed by the closest two points on the splined line. The correction (behind, in front, left or right) is determined with respect to the heading, and added to the original location. IF this method fails, no dummies, no duplicated locations, no reversals are produced. The algorithm: 1. Determine average distance between each point = D 2. Smoothing interval = MAX(2*D, Offset distance) = I 3. Thin input points to be at least the smoothing interval I apart from each other. 4. Smoothly re-interpolate the thinned points at five times the original average distance D. 5. For each input point, calculate the bearing using the nearest points on the smoothed curve
Syntax
public static void OffsetCorrect(
	CVV oVV1,
	CVV oVV2,
	double d3,
	int i4,
	CVV oVV5,
	CVV oVV6
)

Parameters

oVV1
Type: GeoEngine.Core.GXNetCVV
Input X
oVV2
Type: GeoEngine.Core.GXNetCVV
Input Y
d3
Type: SystemDouble
Offset distance
i4
Type: SystemInt32
See VVU_OFFSETConstant
oVV5
Type: GeoEngine.Core.GXNetCVV
Output X
oVV6
Type: GeoEngine.Core.GXNetCVV
Output Y
See Also