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RE: 'timselmean' method too slow ยป fileStructure.txt

Xiangfei LI, 2022-09-08 15:18

 
================================== large File ================================================================

>> ncdisp('largeFile.nc')
Source:
C:\myWorks\3.CoastalErosionExtremeSeaLevel\DATA\TotalWaterLevel\HadGEM3-GC31-HM_future_waterlevel_2041_01_v1.nc
Format:
netcdf4
Global Attributes:
Conventions = 'CF-1.6'
featureType = 'timeSeries'
id = 'GTSMv3_totalwaterlevels'
naming_authority = 'https://deltares.nl/en'
Metadata_Conventions = 'Unidata Dataset Discovery v1.0'
title = '10-minute timeseries of total water levels'
summary = 'This dataset has been produced with the Global Tide and Surge Model (GTSM) version 3.0. GTSM was forced with wind speed and pressure fields from HadGEM3-GC31-HM dataset'
date_created = '2021-03-31 15:11:54.110827 UTC'
project = 'GTSMip and C3S_435_Lot8 Deltares'
acknowledgment = 'The development of this dataset was financed with Deltares Strategic Research Program. Additional funding was received by Contract C3S_435_Lot8 Deltares'
license = 'Copernicus Products License'
institution = 'Deltares & Vrije Universiteit Amsterdam'
sea_name = 'global'
source = 'GTSMv3 forced with HadGEM3-GC31-HM dataset'
keywords = 'sea-level rise; climate change; water level; climate; tides; hydrography; global tide and surge model;'
keywords_vocabulary = 'http://www.eionet.europa.eu/gemet'
standard_name_vocabulary = ''
geospatial_lat_min = '-84.712'
geospatial_lat_max = '83.65'
geospatial_lon_min = '-179.985'
geospatial_lon_max = '179.956'
geospatial_lat_units = 'degrees_north'
geospatial_lat_resolution = 'point'
geospatial_lon_units = 'degrees_east'
geospatial_lon_resolution = 'point'
geospatial_vertical_min = '-7.351'
geospatial_vertical_max = '8.41'
geospatial_vertical_units = 'm'
geospatial_vertical_positive = 'up'
time_coverage_start = '2041-01-01 00:00:00'
time_coverage_end = '2041-01-31 23:50:00'
experiment = 'highres-future'
date_modified = '2021-05-14 23:11:37.704130 UTC'
_NCProperties = 'version=2,netcdf=4.7.3,hdf5=1.10.4'
contact = 'Please contact Copernicus User Support on the Copernicus Climate Change Service website (https://climate.copernicus.eu/).'
history = 'This is version 1 of the dataset'
Dimensions:
time = 4464
stations = 43119
Variables:
waterlevel
Size: 43119x4464
Dimensions: stations,time
Datatype: int16
Attributes:
_FillValue = -999
coordinates = 'station_x_coordinate station_y_coordinate'
scale_factor = 0.001
station_x_coordinate
Size: 43119x1
Dimensions: stations
Datatype: int32
Attributes:
_FillValue = -999
units = 'degrees_east'
short_name = 'longitude'
long_name = 'longitude'
crs = 'EPSG:4326'
scale_factor = 0.001
station_y_coordinate
Size: 43119x1
Dimensions: stations
Datatype: int32
Attributes:
_FillValue = -999
units = 'degrees_north'
short_name = 'latitude'
long_name = 'latitude'
crs = 'EPSG:4326'
scale_factor = 0.001
time
Size: 4464x1
Dimensions: time
Datatype: double
Attributes:
_FillValue = NaN
axis = 'T'
long_name = 'time'
short_name = 'time'
units = 'seconds since 1900-01-01'
calendar = 'proleptic_gregorian'
stations
Size: 43119x1
Dimensions: stations
Datatype: uint16



================================== extracted File =========================================================================



>> ncdisp('extractedFile.nc')
Source:
C:\myWorks\3.CoastalErosionExtremeSeaLevel\DATA\TotalWaterLevel\test.nc
Format:
netcdf4
Global Attributes:
CDI = 'Climate Data Interface version 1.9.9rc1 (https://mpimet.mpg.de/cdi)'
Conventions = 'CF-1.6'
history = 'Thu Sep 08 20:57:44 2022: cdo selname,waterlevel HadGEM3-GC31-HM_future_waterlevel_2041_01_v1.nc test.nc
This is version 1 of the dataset'
_NCProperties = 'version=2,netcdf=4.7.3,hdf5=1.10.4'
source = 'GTSMv3 forced with HadGEM3-GC31-HM dataset'
institution = 'Deltares & Vrije Universiteit Amsterdam'
featureType = 'timeSeries'
id = 'GTSMv3_totalwaterlevels'
naming_authority = 'https://deltares.nl/en'
Metadata_Conventions = 'Unidata Dataset Discovery v1.0'
title = '10-minute timeseries of total water levels'
summary = 'This dataset has been produced with the Global Tide and Surge Model (GTSM) version 3.0. GTSM was forced with wind speed and pressure fields from HadGEM3-GC31-HM dataset'
date_created = '2021-03-31 15:11:54.110827 UTC'
project = 'GTSMip and C3S_435_Lot8 Deltares'
acknowledgment = 'The development of this dataset was financed with Deltares Strategic Research Program. Additional funding was received by Contract C3S_435_Lot8 Deltares'
license = 'Copernicus Products License'
sea_name = 'global'
keywords = 'sea-level rise; climate change; water level; climate; tides; hydrography; global tide and surge model;'
keywords_vocabulary = 'http://www.eionet.europa.eu/gemet'
geospatial_lat_min = '-84.712'
geospatial_lat_max = '83.65'
geospatial_lon_min = '-179.985'
geospatial_lon_max = '179.956'
geospatial_lat_units = 'degrees_north'
geospatial_lat_resolution = 'point'
geospatial_lon_units = 'degrees_east'
geospatial_lon_resolution = 'point'
geospatial_vertical_min = '-7.351'
geospatial_vertical_max = '8.41'
geospatial_vertical_units = 'm'
geospatial_vertical_positive = 'up'
time_coverage_start = '2041-01-01 00:00:00'
time_coverage_end = '2041-01-31 23:50:00'
experiment = 'highres-future'
date_modified = '2021-05-14 23:11:37.704130 UTC'
contact = 'Please contact Copernicus User Support on the Copernicus Climate Change Service website (https://climate.copernicus.eu/).'
CDO = 'Climate Data Operators version 1.9.9rc1 (https://mpimet.mpg.de/cdo)'
Dimensions:
time = 4464 (UNLIMITED)
stations = 43119
Variables:
time
Size: 4464x1
Dimensions: time
Datatype: double
Attributes:
standard_name = 'time'
long_name = 'time'
units = 'seconds since 1900-01-01'
calendar = 'proleptic_gregorian'
axis = 'T'
station_x_coordinate
Size: 43119x1
Dimensions: stations
Datatype: int32
Attributes:
standard_name = 'longitude'
long_name = 'longitude'
units = 'degrees_east'
station_y_coordinate
Size: 43119x1
Dimensions: stations
Datatype: int32
Attributes:
standard_name = 'latitude'
long_name = 'latitude'
units = 'degrees_north'
waterlevel
Size: 43119x4464
Dimensions: stations,time
Datatype: int16
Attributes:
CDI_grid_type = 'unstructured'
coordinates = 'station_y_coordinate station_x_coordinate'
add_offset = 0
scale_factor = 0.001
_FillValue = -999
missing_value = -999
    (1-1/1)