secchi: Secchi depth dataset

Description Usage Source References Examples

Description

Measurements of Secchi depth in the North and Baltic Seas

Usage

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Source

The data were downloaded as a file named Secchi_Ships.csv in October 2013 from https://ocean.ices.dk/Project/SECCHI/, and made into a data frame with new variable names, for use in R. See references for more on the data.

References

Thorkild Aarup 2002, Transparency of the North Sea and Baltic Sea–a Secchi Depth data mining study, Oceanologia, 44(3), 323-337.

Examples

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## Not run: 
library(oce)
data(secchi, package="ocedata")
mapPlot(coastlineWorld, longitudelim=c(-5, 20), latitudelim=c(50, 66),
        grid=5, fill='gray', proj="lambert",
        parameters=c(lat0=50, lat1=65))
col <- rev(oceColorsJet(100))[rescale(secchi$depth, xlow=0, xhigh=20, rlow=1, rhigh=100)]
mapPoints(secchi$longitude, secchi$latitude, pch=20, cex=1, col=col)
mapPolygon(coastlineWorld, col='gray')

## End(Not run)

ocedata documentation built on May 2, 2019, 3:39 p.m.