transectHeading: transectHeading

In jasonfischer/rivSurveyR: A Package to Process Water Velocities Collected With SonTek Acoustic Doppler Current Profilers

Description

Determines the compass heading of a cross-section transect, assuming transect starts at river right

Usage

transectHeading(x, y, velE, velN, depth, flowHeading)

Arguments

x	A vector of x coordinates.
y	A vector of y coordinates. Must be the same length as x.
velE	A vector of velocities to the east. Must be the same length as x.
velN	A vector of velocities to the north. Must be the same length as x.
depth	A vector of water depths. Must be the same length as x.
flowHeading	Optional. Mean direction of flow over the cross-section. If provided velE, velN, and depth may be omitted.

Value

Returns the compass heading of a transect

Examples

data(vels)
velSub <- vels[transectName == "t1",,]
transectHeading(velSub$UTM_X_Proj, velSub$UTM_Y_Proj, velSub$Mean.Vel.E, velSub$Mean.Vel.N, velSub$depth)
#If flow heading is known
transectHeading(velSub$UTM_X_Proj, velSub$UTM_Y_Proj, flowHeading = 149)

jasonfischer/rivSurveyR documentation built on May 18, 2019, 5:54 p.m.