度換算成度分秒的Python操作方法，gis里進行單位轉換

#!/usr/bin/env python

# -*- encoding:utf-8 -*-

"""

輸入文件格式:

107.0381,29.1470;

107.0429,29.1880;

107.0654,29.2076;

107.1492,29.1774;

107.1767,29.1532;

107.1518,29.1260;

107.0822,29.1201;

107.0743,29.1248;

107.0566,29.1338;

107.0381,29.1470;

文件最后沒有空行。

不要求度形式的坐標小數點后面一定是四位。

python num_convert.py [-o outputfilename] inputfilename

python num_convert.py -v 打印版本信息

python num_convert.py -h 打印幫助信息

"""

import sys

import getopt

def datafromfile(f):

ret = []

for line in f:

if line:

line = line[:-2]

num1,num2 = line.split(r',')

ret1,ret2 = conv(num1),conv(num2)

ret.append([ret1,ret2])

else:

ret='\n'

return ret

def conv(num):

'''

bef0: 小數點前面的值

aft012: 轉換后小數點后面第一二位數

aft034: 轉換后小數點后面第三四伴數

'''

num = eval(num)

bef0, aft0 = int(num), num-int(num)

aft012, aft034_t = int(aft0*60), aft0*60-int(aft0*60)

aft034 = int(round(aft034_t*60))

if aft034 < 10:

aft034 = '0'+str(aft034)

elif aft034 == 60:

aft034='00'

aft012 += 1

elif aft034 > 60:

print "error:%s"%aft034

if aft012<10:aft012 = '0' + str(aft012)

sys.stderr.write("bef0:%s,aft012:%s,aft034:%s;"%(bef0, aft012, aft034)

)

return "%s.%s%s"%(bef0, aft012, aft034)

def main():

try:

opts, args = getopt.getopt(sys.argv[1:],"ho:v")

except getopt.GetoptError, err:

print str(err)

sys.exit(2)

version = False

help_ = False

output_t = ''

for o,a in opts:

if o == '-v':

version = True

elif o == '-h':

help_ = True

elif o == '-o':

output_t = a

else:

assert False, "unhandled option"

if help_:

sys.stdout.write('''

#-------www.iplaypy.com------------

num_convert.py

basic usage:

python num_convert.py [-o outputfilename] inputfilename

python num_convert.py -v print version information

python num_convert.py -h print this help.

''')

sys.exit(0)

if version:

sys.stdout.write("version 0.1")

sys.exit(0)

if len(args) == 0:

sys.stderr.write("NEED INPUT FILE!!!")

sys.exit(2)

else:

file_in = args[0]

if len(output_t) == 0:

output = sys.stderr

else:

try:

output = open(output

966

_t,'w')

except:

raise

with open(file_in,'r') as f:

datas = datafromfile(f)

#sys.stderr.write(str(datas))

for data in datas:

packed_data = ','.join(data)+';\n'

output.write(packed_data)

if __name__ == "__main__":

main()

玩蛇網文章，轉載請注明出處和文章網址：https://www.iplaypy.com/code/algorithm/a2378.html

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