Project

General

Profile

showing wrong coordinate information for the UKCP18 RCM data with CDO

Added by S BR about 3 years ago

Hello,
I am trying to do some analysis with the UKCP18 RCM data but when I used the 'cdo sinfo', it looks like the grid dimensions are displacing with CDO. The lat/lon coordinates are supposed to be over the UK but it shows much south of it. Please see the attached figure when I tried to plot it using NCL. The data is supposed to display over the UK, but surprisingly it displayed much over south of it. I am also attaching the data file for your information.

cdo sinfo tasmax_rcp85_land-rcm_uk_12km_time_1.nc
File format : NetCDF4 classic
-1 : Institut Source T Steptype Levels Num Points Num Dtype : Parameter ID
1 : unknown UKCP18 v instant 1 1 9184 1 F32 : -1
2 : unknown UKCP18 v instant 1 2 1 2 I32 : -2
Grid coordinates :
1 : curvilinear : points=9184 (82x112)
grid_longitude : -18.24146 to -6.580251 by 0.1037011 degrees_east
grid_latitude : -0.8710619 to 12.94984 by 0.103758 degrees_north
mapping : transverse_mercator
projection_x_coordinate : -210000 to 762000 by 12000 m
projection_y_coordinate : -102000 to 1230000 by 12000 m
available : cellbounds
2 : generic : points=1
Vertical coordinates :
1 : generic : levels=1
ensemble_member : 1 1
2 : surface : levels=1
Time coordinate : 1 step
RefTime = 1970-01-01 00:00:00 Units = hours Calendar = 360_day Bounds = true
YYYY-MM-DD hh:mm:ss YYYY-MM-DD hh:mm:ss YYYY-MM-DD hh:mm:ss YYYY-MM-DD hh:mm:ss
1980-12-16 00:00:00
cdo sinfo: Processed 2 variables over 1 timestep [0.00s 48MB]

Thank you.


Replies (2)

RE: showing wrong coordinate information for the UKCP18 RCM data with CDO - Added by Brendan DeTracey about 3 years ago

grid_longitude and grid_latitude are as specified in your file. The ranges displayed by sinfo are the values from your file. My guess is someone made a mistake (did not apply the false northing and easting?) before calculating the grid coordinates from the projection.

RE: showing wrong coordinate information for the UKCP18 RCM data with CDO - Added by S BR about 3 years ago

Hi, thanks for your reply but the file works fine with Python by using the OSGB projection.

    (1-2/2)