Creating meteorological maps in R

[jlacko]

There are formats to facilitate this; NetCdf comes to mind.

On the other hand for an existing coordinate / value dataset ggplot2::geom_tile() might be easier.

Have a look at code in this older question; the use case is similar...

How to crop gridded data with shapefile

I don't know how to upload the shapefile, so the data, code and figure are shown below. Due to the large volume of the DFgrid file, I only included part of the dataset, but the dataframe structure is the same. The DFgrid covers whole shapefile border, but some grids are even outside of the border. I can only draw the two figures separately. How to crop the DFgrid file to the shapefile border, so that all grids are inside of the border and have perfect curves at the verge? I would really appreciate your help. ######################### example file library(ggplot2) 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, 6…