I have nc files for global soil moisture,here is one file
https://echange-fichiers.inra.fr/get?k=f9DDllPKdUKs5ZNQwfq
from the metadata ,the projection is cylindrical and the resolution is 25
km(it is based on authalic sphere based on International 1924 ellipsoid).As
I want to compare with other data, I have to make them identical.
- my other data are in WGS84 with 0.25*0.25 degree resolution and extent
-180, 180, -90, 90.
So I want to re-project the data I have here
from
EASE grid, cylindrical,25 km ,1383 pixel 586 lines
to
WGS84,0.25*0.25 degree,1440 pixel 720 lines:
f=open.ncdf("C:\\Users\\aalyaari\\Desktop\\SM_RE01_MIR_CLF31D_20100812T000000_20100812T235959_246_001_7.DBL")
A =
get.var.ncdf(nc=f,varid="Soil_Moisture",verbose=TRUE)
I tried this:
d
<-raster("C:\\Users\\aalyaari\\Desktop\\SM_RE01_MIR_CLF31D_20100812T000000_20100812T235959_246_001_7.nc",
varname = "Soil_Moisture")
d:
class : RasterLayer
dimensions : 586, 1383, 810438 (nrow, ncol, ncell)
resolution : 0.2603037, 0.2916659 (x, y)
extent : -180, 180, -85.4581, 85.4581 (xmin, xmax, ymin, ymax)
coord. ref. : +proj=longlat +datum=WGS84
names : Retrieved.soil.moisture.value
zvar : Soil_Moisture
a <- spTransform(d, CRS ("+proj=longlat +ellps=WGS84 +datum=WGS84
+no_defs"))
but I got this error:
Error in function (classes, fdef, mtable) :
unable to find an inherited method for function ‘spTransform’
for signature ‘"RasterLayer", "CRS"’
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