VTrack (version 1.21)

PointsCircuitous_crocs: Points File Containing VR2 Locations on the Wenlock River in 2008 with Waypoints Connecting Receivers

Description

This points file contains the locations of 20 VR2 receivers plus their corresponding detection radiuses for monitoring saltwater crocodiles on the Wenlock River in 2008. When receivers have an obstructed line of view to landscape features (i.e. an island or a bend in the river) waypoints were added to facilitate the course of the shortest path. This points file corresponds with crocs.

Usage

data(PointsCircuitous_crocs)

Format

A data frame with 149 observations on the following 4 variables.

LOCATION

a numeric vector containing the receiver serial number (i.e. RECEIVERID)

LATITUDE

a numeric vector containing the location's latitude in decimal degrees

LONGITUDE

a numeric vector containing the location's longitude in decimal degrees

RADIUS

a numeric vector containing the detection radius for the receiver in meters

Details

The coordinates are given in decimal degrees WGS 84, detection radiuses are in meters.

Examples

# NOT RUN {
# Load the points file for the Wenlock River
data(PointsCircuitous_crocs)
head(PointsCircuitous_crocs)
receiversonly <- na.omit(PointsCircuitous_crocs)

# Plot the locations of the receivers plus the waypoints
par(mfrow=c(1,1),las=1,bty="l")
plot(PointsCircuitous_crocs$LONGITUDE, PointsCircuitous_crocs$LATITUDE,
     pch=1,cex=0.5,col="grey",xlab="Longitude",ylab="Latitude")
points(receiversonly$LONGITUDE,receiversonly$LATITUDE,cex=1,pch=10)
# }