The hardware and bandwidth for this mirror is donated by dogado GmbH, the Webhosting and Full Service-Cloud Provider. Check out our Wordpress Tutorial.
If you wish to report a bug, or if you are interested in having us mirror your free-software or open-source project, please feel free to contact us at mirror[@]dogado.de.
We need to plot satellite remote sensing chlorophyll-a data with the NASA palette and a correct scale.
The R package palr contains a function to return the required colours and values, but it contains a large maximum value to account for large possible summary values.
We specify a maximum range on the values, and plot the scale in two different ways.
maxrange <- c(0.01, 10)
library(palr)
pal <- chl_pal(palette = TRUE)
sb <- which(pal$breaks >= maxrange[1] & pal$breaks <= maxrange[2])
plot(pal$breaks, col = pal$cols, log = "y", ylim = maxrange)
## select values from the NASA legend
abline(h = c(0.01, 0.03, 0.1, 0.3, 1, 3, 10))
op <- par(fig = c(0.3, 0.7, 0, 1));
plot(NA_real_, xlim = c(0, 1), ylim = maxrange, xlab = "", ylab = "", log = "y")
rasterImage(matrix(rev(pal$cols[sb])), 0, 0.01, 1, 10)
abline(h = c(0.01, 0.03, 0.1, 0.3, 1, 3, 10))
Compare these plots with the official NASA legend here.
https://oceancolor.gsfc.nasa.gov/l3/
These binaries (installable software) and packages are in development.
They may not be fully stable and should be used with caution. We make no claims about them.
Health stats visible at Monitor.