I have a dataset like this:
DFgrid= data.frame(
lon=c(59.25, 59.75, 60.25, 60.75, 61.25, 61.75, 57.25, 57.75, 58.25, 58.75, 59.25, 59.75, 60.25, 60.75, 61.25, 61.75, 62.25, 57.25, 57.75, 58.25, 58.75, 59.25, 59.75, 60.25, 60.75, 61.25, 61.75, 62.25, 62.75, 53.25),
lat=c(25.25, 25.25, 25.25, 25.25, 25.25, 25.25, 25.75, 25.75, 25.75, 25.75, 25.75, 25.75, 25.75, 25.75, 25.75, 25.75, 25.75, 26.25, 26.25, 26.25, 26.25, 26.25, 26.25, 26.25, 26.25, 26.25, 26.25, 26.25, 26.25, 26.75),
value= rnorm(30)
)
Each value has the corresponding geographical coordinate at the centroid. This is at 0.5 degree (1/4) spatial resolution, how to interpolate to 0.0625 degree (1/16) centroid values? And how to interpolate to 1 degree spatial resolution centroid values in R? There are many grid cells.
Thanks for your help.