isolineSatin: Obtaining isolines from satellite data

In r-forge/satin: Functions for downloading, reading and displaying satellite data for oceanographic applications with R

Description

User defined isolines are calculated from satellite data and returned as polylines

Usage

isolineSatin(satin.obj, levels, image = 1, plot = TRUE)

Arguments

satin.obj	a satin object as returned by read.oceancolor
levels	vector of desired isolines
image	number of image to process
plot	logical, if TRUE a plot is produced (the default)

Details

Polyline coordinates of desired isolines are calculated via contourLines and convCP (from PBSMapping package). Perhaps only interesting with sea surface temperatures (isotherms).

Value

a data frame object of class "PolySet". See help(PolySet) for a complete description

Author(s)

Héctor Villalobos, from code in examples of PBSMapping package

References

Schnute, J.T., Boers, N.M., Haigh, R. and Couture-Beil, A. 2011. PBS Mapping 2.62: user's guide revised from Canadian Technical Report of Fisheries and Aquatic Sciences 2549:vi + 112 p. Last updated Feb 29, 2011.

See Also

contourLines, convCP, PolySet

Examples

data(dbsst)
sst0.5 <- scaleSatin(dbsst, extent=0.5) 
isolin <- isolineSatin(sst0.5, levels=c(13, 17, 21))
plotSatin(dbsst)
addLines(isolin$PolySet, col="black")

r-forge/satin documentation built on Feb. 18, 2022, 2:39 a.m.