region_definitions: region definitions dataframe

Description Usage Format Value Author(s) See Also Examples

Description

dataset providing spatial extent and color bar placement information by a region-keyword in later related function-calls (see: v, plotmap and regions). Information consists of a region-keyword, -longname, its spatial extent (longitudes and latitudes), grid resolution, as well as default colorbar position and figure size. Region definitions can be added, backed up or restored by add.region or deleted by calling delete.region.

ATTENTION! When reinstalling or updating the oceanmap package, previous region definitions are getting lost! It is therefore highly recommanded to take and restore own backups (see: backup and restore).

Usage

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Format

data.frame

Value

dataframe with the following header, containing the summary information of the region specified:

label name latn lats lonw lone ncol nrow px cbx1 cbx2 cby1 cby2 gradient oticks figxdim figydim grid.res

label

region-keywords

name

the long name of the region

latn & lats

northern and southern most latitude of the region

lonw & lone

western and eastern most longitude of the region

ncol, nrow & px

default matrix size per region described by the number of columns, rows and pixels. ATTENTION!! Regions of the same spatial extent but different default (matrix-) resolution may cause errors when reading or writing '.gz'-files and must therefore be distinguished by different keywords.

cbx1 & cbx2

x-coordinates for colorbar

cby1 & cby2

y-coordinates for colorbar

gradient

the color-gradient of the colorbar (x for horizontal, and y for vertical)

oticks

the margin where the colorbar ticks should be plotted, relative to the colorbar rectangle ('l' left, 'r' right and 'b' for bottom)

figxdim & figydim

the region-specific default plot device size (width and height in inches)

grid.res

the default grid resolution in degrees

Author(s)

Robert K. Bauer

See Also

See add.region to add new, backup or restore region definitions, and plotmap for basic landmask plots

Examples

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data(region_definitions)
head(region_definitions)
region_definitions$label
# ?region_definitions

# figure(width=15,height=15)
# par(mfrow=c(5,6))
# for(n in region_definitions$label) plotmap(region = n,main=n)


# Mediterranean Sea with a spatial resolution of 4km (e.g. MODIS-Aqua)
region_definitions[region_definitions$label == 'med4',]

# Mediterranean Sea with a spatial resolution of 9km (e.g. dekkar)
region_definitions[region_definitions$label == 'med9',]

# plotting same landmasks by different region-keywords
plotmap('med4')
plotmap('med9')


## Example for selecting wrong area definition when saving files
path <- system.file("test_files", package="oceanmap")
gz.files <- Sys.glob(paste0(path,'/med4*.gz')) # load sample-med4'.gz'-files

fname <- name_split(gz.files[1])
param <- fname$parameter
gz <- readbin(gz.files[1])
dim(gz)
v(gz.files[1])

## reset region name
# fname$area <- 'med9'
# fname <- name_join(fname)
# writebin(gz,fname,param=param)
# v(fname,folder=".")
# system(paste('rm', fname))

oceanmap documentation built on March 23, 2020, 5:06 p.m.