Creates a SpatRasterDataset (terra R-package) object from a variable from wrf file (or another compatible NetCDF) for all times and levels
Usage
wrf_sds(
file = file.choose(),
name = NA,
map,
latlon = FALSE,
method = "bilinear",
flip_h = FALSE,
flip_v = FALSE,
verbose = FALSE,
...
)Arguments
- file
wrf file
- name
variable name
- map
(optional) file with lat-lon variables and grid information
- latlon
logical (default is FALSE), set TRUE project the output to "+proj=longlat +datum=WGS84 +no_defs"
- method
method passed to terra::projection, default is bilinear
- flip_h
horizontal flip (by rows)
- flip_v
vertical flip (by cols)
- verbose
display additional information
- ...
extra arguments passed to ncdf4::ncvar_get
Value
SpatRasterDataset object (from terra package), each time-step is considered one subdatasets and each layer is one nlyr.
Note
The convention adopted to select specific times and atmospheric layers on wrf_sds is sds[time,layer] to keep consistence with sds.
Examples
file <- paste0(system.file("extdata",package="eva3dm"),"/wrf_4d_o3_Boston.nc")
O34d <- wrf_sds(file,'o3',verbose = TRUE)
#> reading o3 from /home/runner/work/_temp/Library/eva3dm/extdata/wrf_4d_o3_Boston.nc
#> creating SpatRasterDataset for o3
# selecting one time, keeping multiple layers
O34d[1,]
#> class : SpatRaster
#> size : 15, 15, 11 (nrow, ncol, nlyr)
#> resolution : 12000, 12000 (x, y)
#> extent : 702000.3, 882000.3, 564000.8, 744000.8 (xmin, xmax, ymin, ymax)
#> coord. ref. : +proj=lcc +lat_0=36.7999992370605 +lon_0=-80.8000030517578 +lat_1=33 +lat_2=45 +x_0=0 +y_0=0 +R=6370000 +units=m +no_defs
#> source(s) : memory
#> names : o3_level_01, o3_level_02, o3_level_03, o3_level_04, o3_level_05, o3_level_06, ...
#> min values : 2.448919e-05, 0.003329671, 0.02056964, 0.02271221, 0.02671067, 0.03475916, ...
#> max values : 4.445846e-02, 0.044524230, 0.04455488, 0.04457706, 0.04460543, 0.04464806, ...
#> unit : ppmv
#> time : 2024-01-01 01:00:00 UTC
# selecting one layer, keeping multiple times
O34d[,1]
#> class : SpatRaster
#> size : 15, 15, 2 (nrow, ncol, nlyr)
#> resolution : 12000, 12000 (x, y)
#> extent : 702000.3, 882000.3, 564000.8, 744000.8 (xmin, xmax, ymin, ymax)
#> coord. ref. : +proj=lcc +lat_0=36.7999992370605 +lon_0=-80.8000030517578 +lat_1=33 +lat_2=45 +x_0=0 +y_0=0 +R=6370000 +units=m +no_defs
#> source(s) : memory
#> names : o3_level_01, o3_level_01
#> min values : 2.448919e-05, 8.437687e-05
#> max values : 4.445846e-02, 4.394168e-02
#> unit : ppmv
#> time : 2024-01-01 01:00:00 to 2024-01-01 02:00:00 UTC (2 steps)