getting data from an nc file

Maybe you are looking for something like this:

nc_data<-nc_open("chess-met_precip_gb_1km_daily_20150101-20150131.nc")
lon<-lon<-nc_data$dim$LON$vals
lat<-nc_data$dim$LAT$vals

or

lon<-ncvar_get(nc_data,nc_data$dim$LON)
lat<-ncvar_get(nc_data,nc_data$dim$LAT)

Note that the LON and LAT can be anything as Mike said. Hope it's helps.

Ani

On Wed, Nov 9, 2022 at 7:54 PM Nick Wray <nickmwray at gmail.com> wrote:

Hello

I am trying to get rainfall data from the UK chess-met site

https://catalogue.ceh.ac.uk/datastore/eidchub/2ab15bf0-ad08-415c-ba64-831168be7293/precip/

and here there are a large number of nc files eg

"chess-met_precip_gb_1km_daily_20150101-20150131.nc"

I?ve found various sources on the net for opening nc files, and getting

the

data but when I try instructions like

nc_data<-nc_open("chess-met_precip_gb_1km_daily_20150101-20150131.nc")

lon <- ncvar_get(nc_data, "lon")

lon



the code works but all I get is a series of element numbers and no data:

[,1]     [,2]     [,3]     [,4]     [,5]     [,6]     [,7]     [,8]

 [,9]

[,10]    [,11]    [,12]

          [,13]    [,14]    [,15]    [,16]    [,17]    [,18]    [,19]
[,20]    [,21]    [,22]    [,23]    [,24]



And similarly for latitude

But if I open the nc file as a raster I get a raster precipitation plot

of

Great Britain, which rather suggests that the lat and long values are in
there somewhere

Can anyone help with getting the actual data sets out of an nc file?

Thanks Nick Wray

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