66 lines
2.1 KiB
Python
66 lines
2.1 KiB
Python
#!/usr/bin/python
|
|
|
|
# Requirement:
|
|
# 1. DEM files download from ASTER GDEM. Total files is more than 300 GB.
|
|
# More information may be found in http://shud.ncdc.ac.cn/res/HydroCloud_cn.html
|
|
# 2. gdal and gdal-mergy.py files.
|
|
#
|
|
# The path of ASTER Global DEM files: '/Volumes/Spatial/World/DEM/Aster_GDEM/'
|
|
# Example files: ASTGTMV003_N00E011_dem.tif, ASTGTMV003_S83W143_dem.tif
|
|
#
|
|
# The OUTPUT:
|
|
# Option 1: gdal_merge.py command. You can copy, modify and execute the command by your own.
|
|
# Option 2: Execute the command via calling system command in python.
|
|
|
|
import sys
|
|
import math
|
|
import os
|
|
|
|
def funmerge(xmin, xmax, ymin, ymax, path, fout):
|
|
flist = []
|
|
xx = [x for x in range(int(xmin)-5, int(xmax)+1) if x % 5 == 0]
|
|
yy = [y for y in range(int(ymin)-5, int(ymax)+1) if y % 5 == 0]
|
|
print("xx =", xx)
|
|
print("yy =", yy)
|
|
#path = '/Volumes/SpatialData/World/DEM/Aster_GDEM/'
|
|
prefix = ''
|
|
sufix = '_elv.tif'
|
|
#fout = 'gdem'+'_'.join([str(xmin), str(xmax), str(ymin), str(ymax)])+'.tif'
|
|
cmd = 'gdal_merge.py -o ' + fout + ' '
|
|
for i in xx:
|
|
for j in yy:
|
|
sx = 'w' + str(abs(i)).zfill(3) if i < 0 else 'e' + str(abs(i)).zfill(3)
|
|
sy = 'w' + str(abs(j)).zfill(2) if i < 0 else 'n' + str(abs(j)).zfill(2)
|
|
fs = ''.join([str(path), prefix, sy, sx, sufix])
|
|
# print(fs)
|
|
if os.path.isfile(fs):
|
|
print('Exist: ', fs)
|
|
flist.append(fs)
|
|
else:
|
|
print('Missing: ', fs)
|
|
|
|
|
|
cmd = cmd + ' '.join(flist)
|
|
print('\n')
|
|
print(cmd)
|
|
print('\n')
|
|
#os.system(cmd) # uncomment this line, if you wanna execute the command.
|
|
|
|
#funmerge(101, 103, 34, 37)
|
|
|
|
print ('Number of arguments:', len(sys.argv), 'arguments.')
|
|
print ('Argument List:', str(sys.argv) )
|
|
|
|
nv = len(sys.argv)
|
|
if nv != 8 :
|
|
print('Usage: ')
|
|
print('\tpython3 merge.py lonmin lonmax latmin latmax Path_to_DEM_file')
|
|
print('\n')
|
|
else:
|
|
print(' '.join(sys.argv))
|
|
print('\n')
|
|
funmerge(sys.argv[1], sys.argv[2], sys.argv[3], sys.argv[4], sys.argv[5], sys.argv[6])
|
|
|
|
print('Done.\n\n')
|
|
|