rectGrid: Produce a grid of rectangles on a plot, filled with colors if...
In geo: Draw and Annotate Maps, Especially Charts of the North Atlantic

Description Usage Arguments Details Value Note Author(s) See Also Examples

Functions that plot a line grid or one filled with colors for rectangle codes in systems of various resolutions with call to geolines or geopolygon and perimeter utility functions (see rectPeri).

rgrid(r, fill = FALSE, ...)

srgrid(sr, fill = FALSE, ...)

mrgrid(mr, dlat = 5, dlon = 10, fill = FALSE, ...)

drgrid(dr, dlat = 1, dlon = 2, fill = FALSE, ...)

`r,sr,dr,mr`	Codes of rectangle to be outlined or filled. In different resolutions, `r, sr` with their own system (see `deg2rect`), `mr` dimensions based on minutes, `dr` on degrees.
`fill`	Logical, whether or not to fill the plotted rectangles.
`dlat,dlon`	Dimensions of latitude and longitude given in minutes and degrees for `mrgrid` and `drgrid`, respectively
`...`	other arguments to `geopolygon` or `geolines` as appropriate, notably `col`.

The functions simply outline or fill the rectangles they are given. whereas reitaplott and geoSR assume levels and are more hi-level.

No values returned, used for side-effects.

Functions reitaplott and geoSR have more in-built functionality to deal with level-plots of rectangles.

STJ

deg2rect, geolines, geopolygon, rectPeri, reitaplott, geoSR.

geoplot(grid = FALSE)
tmp <- island
tmp$sr <- d2sr(island)
srects <- aggregate(. ~ sr, tmp, length)
names(srects)[2] <- "count"
srects$lev <- cut(srects$count, c(0, 1, 5, 10, 20, 50, 100))
mycol <- heat.colors(length(unique(srects$lev)))
srgrid(srects$sr, fill = TRUE, col = mycol[srects$lev])
geolines(island)