source: palm/trunk/SCRIPTS/palm_csd_files/palm_csd_netcdf_interface.py @ 3574

#!/usr/bin/env python3
# -*- coding: utf-8 -*-
#--------------------------------------------------------------------------------#
# This file is part of the PALM model system.
#
# PALM is free software: you can redistribute it and/or modify it under the terms
# of the GNU General Public License as published by the Free Software Foundation,
# either version 3 of the License, or (at your option) any later version.
#
# PALM is distributed in the hope that it will be useful, but WITHOUT ANY
# WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
# A PARTICULAR PURPOSE.  See the GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License along with
# PALM. If not, see <http://www.gnu.org/licenses/>.
#
# Copyright 1997-2018  Leibniz Universitaet Hannover
#--------------------------------------------------------------------------------#
#
# Current revisions:
# -----------------
# 
# 
# Former revisions:
# -----------------
# $Id: palm_csd_netcdf_interface.py 3567 2018-11-27 13:59:21Z raasch $
# Initial revisions
#
#
# 
#
#
# Description:
# ------------
# NetCDF interface routines for palm_csd
#
# @Author Bjoern Maronga (maronga@muk.uni-hannover.de)
#
#------------------------------------------------------------------------------#

from netCDF4 import Dataset

def nc_read_from_file_2d(filename, varname, x0, x1, y0, y1):


   import numpy as np
   import sys
   
   try:
      f = open(filename)
      f.close()
#      print("Load: " + filename + ".")
   except FileNotFoundError:
      print("Error: " + filename + ". No such file. Aborting...")
      sys.exit(1)
   
   nc_file = Dataset(filename, "r+", format="NETCDF4")
   tmp_array = np.array(nc_file.variables[varname][y0:y1+1,x0:x1+1] , dtype=type(nc_file.variables[varname]))

   return tmp_array

def nc_read_from_file_2d_all(filename, varname):


   import numpy as np
   import sys
   
   try:
      f = open(filename)
      f.close()
#      print("Load: " + filename + ".")
   except FileNotFoundError:
      print("Error: " + filename + ". No such file. Aborting...")
      sys.exit(1)
   
   nc_file = Dataset(filename, "r+", format="NETCDF4")
   tmp_array = np.array(nc_file.variables[varname][:][:], dtype=type(nc_file.variables[varname]))

   return tmp_array

def nc_read_from_file_1d(filename, varname, x0, x1):

   import numpy as np
   import sys
   
   try:
      f = open(filename)
      f.close()
      #print("Load: " + filename + ".")
   except FileNotFoundError:
      print("Error: " + filename + ". No such file. Aborting...")
      sys.exit(1)
   
   nc_file = Dataset(filename, "r+", format="NETCDF4")
   tmp_array = np.array(nc_file.variables[varname][x0:x1+1] , dtype=type(nc_file.variables[varname]))

   return tmp_array


def nc_create_file(filename):

   import datetime

   try:
      f =  Dataset(filename, "w", format="NETCDF4")
      f.close()
      print("Created: " + filename + ".")
   except FileNotFoundError:
      print("Error. Could not create file: " + filename + ". Aborting...")
      sys.exit(1)

   return 0


   
def nc_write_global_attributes(filename,origin_x,origin_y,origin_lat,origin_lon,origin_time, global_acronym,global_angle,
                               global_author,global_campaign,global_comment,global_contact,global_data_content,
                               global_dependencies,global_institution,global_keywords,global_location,global_palm_version,
                               global_references,global_site,global_source,global_version):

   import datetime
   import os

   print("Writing global attributes to file...")

   f =  Dataset(filename, "a", format="NETCDF4")

   f.setncattr('Conventions',"CF-1.7") 
   
   f.origin_x = origin_x
   f.origin_y = origin_y
   f.origin_time = origin_time
   f.origin_lat = origin_lat
   f.origin_lon = origin_lon
   
   f.acronym = global_acronym
   f.rotation_angle = global_angle
   f.author = global_author
   f.campaign = global_campaign
   f.comment = global_comment
   f.contact = global_contact
   f.data_content   = global_data_content
   f.dependencies = global_dependencies
   f.institution = global_institution
   f.keywords = global_keywords
   f.location = global_location
   f.palm_version = global_palm_version
   f.references = global_references
   f.site = global_site
   f.source = global_source
   f.version = global_version
   

   f.close()

   return 0


def nc_write_dimension(filename,varname,array,datatype):

   try:
      f =  Dataset(filename, "a", format="NETCDF4")
      #print("Opened: " + filename + ".")
   except FileNotFoundError:
      print("Error. Could not open file: " + filename + ". Aborting...")
      sys.exit(1)

   print("Writing dimension " + varname + " to file...")
   
   f.createDimension(varname,len(array))
   temp = f.createVariable(varname,datatype,varname)
   temp[:] = array
   
   f.close()
   
   return 0

def nc_write_to_file_2d(filename,varname,array,datatype,dimname1,dimname2,fillvalue):

   try:
      f =  Dataset(filename, "a", format="NETCDF4")
      #print("Opened: " + filename + ".")
   except FileNotFoundError:
      print("Error. Could not open file: " + filename + ". Aborting...")
      sys.exit(1)

   print("Writing array " + varname + " to file...")
   
   temp = f.createVariable(varname,datatype,(dimname1,dimname2),fill_value=fillvalue)
   temp[:] = array
   
   f.close()

   return 0

def nc_overwrite_to_file_2d(filename,varname,array):

   try:
      f =  Dataset(filename, "a", format="NETCDF4")
      #print("Opened: " + filename + ".")
   except FileNotFoundError:
      print("Error. Could not open file: " + filename + ". Aborting...")
      sys.exit(1)

   print("Writing array " + varname + " to file...")
   
   temp = f.variables[varname]
   temp[:,:] = array
   
   f.close()

   return 0

def nc_write_to_file_3d(filename,varname,array,datatype,dimname1,dimname2,dimname3,fillvalue):

   try:
      f =  Dataset(filename, "a", format="NETCDF4")
      #print("Opened: " + filename + ".")
   except FileNotFoundError:
      print("Error. Could not open file: " + filename + ". Aborting...")
      sys.exit(1)

   print("Writing array " + varname + " to file...")
   
   temp = f.createVariable(varname,datatype,(dimname1,dimname2,dimname3),fill_value=fillvalue)
   temp[:,:,:] = array
   
   f.close()

   return 0


def nc_write_attribute(filename,variable,attribute,value):

   f = Dataset(filename, "a", format="NETCDF4")

   var = f.variables[variable]
   var.setncattr(attribute,value) 
   
   f.close()

   return 0

def nc_write_crs(filename):

   try:
      f =  Dataset(filename, "a", format="NETCDF4")
      #print("Opened: " + filename + ".")
   except FileNotFoundError:
      print("Error. Could not open file: " + filename + ". Aborting...")
      sys.exit(1)

   print("Writing crs to file...")
   
   temp = f.createVariable("crs","i")
   
   temp.long_name = "coordinate reference system"
   temp.grid_mapping_name = "transverse_mercator"
   temp.semi_major_axis = 6378137.0
   temp.inverse_flattening = 298.257222101
   temp.longitude_of_prime_meridian = 0.0
   temp.longitude_of_central_meridian = 9.0
   temp.scale_factor_at_central_meridian = 0.9996
   temp.latitude_of_projection_origin = 0.0
   temp.false_easting = 50000.0
   temp.false_northing = 0.0
   temp.units = "m"
   temp.epsg_code = "EPSG:25833"
   
   f.close()

   return 0