Created
December 16, 2021 10:32
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Raster calculator based on gdal's `gdal_calc` script for some environmental variables (CKI, WKI, IC, PWKI, PCKI)
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| #!/usr/bin/env python3 | |
| # -*- coding:utf-8 -*- | |
| """ | |
| Created Date: Saturday December 11th 2021 | |
| Author: Dmitry Kislov | |
| E-mail: [email protected] | |
| ----- | |
| Last Modified: Wednesday, December 15th 2021, 2:32:54 pm | |
| Modified By: Dmitry Kislov | |
| ----- | |
| Copyright (c) 2021 | |
| """ | |
| import subprocess | |
| import glob | |
| import string | |
| import os | |
| import sys | |
| def locate_files(path='data', ext='*.tif'): | |
| result = dict() | |
| for f in glob.glob(f'{path}/**/{ext}', recursive=True): | |
| filename = '.'.join(os.path.basename(f).split('.')[:-1]) | |
| var, month = filename.split('_')[-2:] | |
| result[(var.lower(), month)] = f | |
| return result | |
| def get_wki_command(threshold='5.0'): | |
| command = [sys.executable, | |
| rf'{os.environ.get("CONDA_PREFIX")}\Scripts\gdal_calc.py'] | |
| filtered_files = {k: v for k, v in locate_files().items() if 'tavg' in k} | |
| file_letters = [] | |
| for s, (_, f) in zip(string.ascii_uppercase, filtered_files.items()): | |
| command.extend([f'-{s}', f]) | |
| file_letters.append(s) | |
| command.append('--outfile=wki.tif') | |
| formula = '+'.join(f'{l}*({l}>{threshold})- {threshold}*({l}>{threshold})' for l in file_letters) | |
| command.append(f'--calc={formula}') | |
| return command | |
| #print(get_wki_command()) | |
| subprocess.call(get_wki_command()) | |
| def get_cki_command(threshold='5.0'): | |
| command = [sys.executable, | |
| rf'{os.environ.get("CONDA_PREFIX")}\Scripts\gdal_calc.py'] | |
| filtered_files = {k: v for k, v in locate_files().items() if 'tavg' in k} | |
| file_letters = [] | |
| for s, (_, f) in zip(string.ascii_uppercase, filtered_files.items()): | |
| command.extend([f'-{s}', f]) | |
| file_letters.append(s) | |
| command.append('--outfile=cki.tif') | |
| formula = '+'.join(f'numpy.abs({threshold} * ({l}<{threshold}) - {l}*({l}<{threshold}))' for l in file_letters) | |
| command.append(f'--calc={formula}') | |
| return command | |
| subprocess.call(get_cki_command()) | |
| from itertools import chain | |
| def get_pwki_command(threshold='5.0'): | |
| command = [sys.executable, | |
| rf'{os.environ.get("CONDA_PREFIX")}\Scripts\gdal_calc.py'] | |
| filtered_files_tavg = {k: v for k, v in locate_files().items() if 'tavg' in k} | |
| filtered_files_prec = {k: v for k, v in locate_files().items() if 'prec' in k} | |
| file_letters_tavg = [] | |
| file_letters_prec = [] | |
| for s, (_, f) in zip(string.ascii_uppercase, chain(filtered_files_tavg.items(), filtered_files_prec.items())): | |
| command.extend([f'-{s}', f]) | |
| if 'tavg' in f: | |
| file_letters_tavg.append(s) | |
| if 'prec' in f: | |
| file_letters_prec.append(s) | |
| command.append('--outfile=pwki.tif') | |
| formula = '+'.join(f'{p} * ({t}>{threshold})' for t, p in zip(file_letters_tavg, file_letters_prec)) | |
| command.append(f'--calc={formula}') | |
| return command | |
| subprocess.call(get_pwki_command()) | |
| def get_pcki_command(threshold='5.0'): | |
| command = [sys.executable, | |
| rf'{os.environ.get("CONDA_PREFIX")}\Scripts\gdal_calc.py'] | |
| filtered_files_tavg = {k: v for k, v in locate_files().items() if 'tavg' in k} | |
| filtered_files_prec = {k: v for k, v in locate_files().items() if 'prec' in k} | |
| file_letters_tavg = [] | |
| file_letters_prec = [] | |
| for s, (_, f) in zip(string.ascii_uppercase, chain(filtered_files_tavg.items(), filtered_files_prec.items())): | |
| command.extend([f'-{s}', f]) | |
| if 'tavg' in f: | |
| file_letters_tavg.append(s) | |
| if 'prec' in f: | |
| file_letters_prec.append(s) | |
| command.append('--outfile=pcki.tif') | |
| formula = '+'.join(f'{p} * ({t}<{threshold})' for t, p in zip(file_letters_tavg, file_letters_prec)) | |
| command.append(f'--calc={formula}') | |
| return command | |
| subprocess.call(get_pcki_command()) | |
| def get_ic_command(threshold='5.0'): | |
| command = [sys.executable, | |
| rf'{os.environ.get("CONDA_PREFIX")}\Scripts\gdal_calc.py'] | |
| filtered_files_tmin = {k: v for k, v in locate_files().items() if 'tmin' in k} | |
| filtered_files_tmax = {k: v for k, v in locate_files().items() if 'tmax' in k} | |
| file_letters_tmin = [] | |
| file_letters_tmax = [] | |
| for s, (_, f) in zip(string.ascii_uppercase, chain(filtered_files_tmin.items(), filtered_files_tmax.items())): | |
| command.extend([f'-{s}', f]) | |
| if 'tmin' in f: | |
| file_letters_tmin.append(s) | |
| if 'tmax' in f: | |
| file_letters_tmax.append(s) | |
| command.append('--outfile=ic.tif') | |
| formula = 'numpy.maximum.reduce([' + ','.join(file_letters_tmax) + '])' +\ | |
| '-numpy.minimum.reduce([' + ','.join(file_letters_tmin) + '])' | |
| command.append(f'--calc={formula}') | |
| return command | |
| subprocess.call(get_ic_command()) |
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