getting data from an nc file
HDF Viewer<https://www.hdfgroup.org/downloads/hdfview/> can be a good way to look at the structure of nc files to see where different information is stored in the file.
From: R-sig-Geo <r-sig-geo-bounces at r-project.org> on behalf of Nick Wray <nickmwray at gmail.com>
Sent: Wednesday, November 9, 2022 5:53 AM
To: r-sig-geo at r-project.org <r-sig-geo at r-project.org>
Subject: [R-sig-Geo] getting data from an nc file
Sent: Wednesday, November 9, 2022 5:53 AM
To: r-sig-geo at r-project.org <r-sig-geo at r-project.org>
Subject: [R-sig-Geo] getting data from an nc file
Hello I am trying to get rainfall data from the UK chess-met site https://nam04.safelinks.protection.outlook.com/?url=https%3A%2F%2Fcatalogue.ceh.ac.uk%2Fdatastore%2Feidchub%2F2ab15bf0-ad08-415c-ba64-831168be7293%2Fprecip%2F&data=05%7C01%7Cailich%40usf.edu%7C39cfc2a140934dc323d408dac240b9c0%7C741bf7dee2e546df8d6782607df9deaa%7C0%7C0%7C638060296454914830%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=AJ5Q%2BWYYGxbXJZjHxisFdGAAomjtIWn95k5r9vtXniw%3D&reserved=0 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 [[alternative HTML version deleted]] _______________________________________________ R-sig-Geo mailing list R-sig-Geo at r-project.org https://nam04.safelinks.protection.outlook.com/?url=https%3A%2F%2Fstat.ethz.ch%2Fmailman%2Flistinfo%2Fr-sig-geo&data=05%7C01%7Cailich%40usf.edu%7C39cfc2a140934dc323d408dac240b9c0%7C741bf7dee2e546df8d6782607df9deaa%7C0%7C0%7C638060296454914830%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=dOzJYz06Zy8XUTh05KFvBI%2BMF3n0clxcgCsILupkkps%3D&reserved=0 [EXTERNAL EMAIL] DO NOT CLICK links or attachments unless you recognize the sender and know the content is safe.