GeoRef: Georeference the Dead Reckoning data

In TrackReconstruction: Reconstruct Animal Tracks from Magnetometer, Accelerometer, Depth and Optional Speed Data

Description

A wrapper function for the GeoReference function that georeferences a deadreckoning track with multiple GPS relocations.

Usage

GeoRef(drdata, gpsfdata)

Arguments

drdata	Data frame from, or similar in format as that produced by the DeadReckoning function.
gpsfdata	Data frame from, or similar in format as that produced by the GPStable function.

Details

Data that is not bookended by the DateTime stamp of the GPS relocations will be discarded. The DateTime stamp of the drdata and gpsfdata must be in the same format, see the strptime function help file for details.

Value

Returns a data frame with DateTime, Distance, LatRad, LongRad, Latitude, Longitude, Depth, Speed, NewX, NewY, and Bering of the Georeferenced Deadreckoned tracks. NewX and NewY are cartesian coordinates in meters. Distance is the distance from the origin to the georeferenced point in 2D.

Author(s)

Brian Battaile

References

Wilson R.P., Liebsch,N., Davies,I.M., Quintana,F., Weimerskirch,H., Storch,S., Lucke,K., Siebert,U., Zankl,S., Muller,G., Zimmer,I., Scolaro,A., Campagna,C., Plotz,J., Bornemann,H., Teilmann,J. and Mcmahon,C.R. (2007) All at sea with animal tracks; methodological and analytical solutions for the resolution of movement. Deep-Sea Research II 54:193-210

Examples

#Standardize tag output
betas<-Standardize(1,1,-1,1,1,1,-57.8,68.76,-61.8,64.2,-70.16,58.08,
	-10.1,9.55,-9.75,9.72, -9.91,9.43)
#get declination and inclination data for study area
decinc<-c(10.228,65.918)
#data set with 6 associated GPS fixes in the "gpsdata" data set
data(rawdata)
DRoutput<-DeadReckoning(rawdata,betas,decinc,Hz=16,RmL=2,DepthHz=1,SpdCalc=3,MaxSpd=3.5)
#prepare GPS data
data(gpsdata02)
gpsformat<-GPStable(gpsdata02)
Georeferenced<-GeoRef(DRoutput,gpsformat)
plot(Georeferenced$Longitude,Georeferenced$Latitude,pch=".")
points(gpsformat$Longitude[2],gpsformat$Latitude[2],pch="S",col="Red") #Start
points(gpsformat$Longitude[7],gpsformat$Latitude[7],pch="F",col="Blue") #Finish
#Intermediate GPS points
points(gpsformat$Longitude[3:6],gpsformat$Latitude[3:6],pch="*",col="Red")

TrackReconstruction documentation built on Dec. 11, 2021, 10:07 a.m.