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#!/env/python | |
# coding=utf8 | |
""" | |
Converting Degrees, Minutes, Seconds formatted coordinate strings to decimal. | |
Formula: | |
DEC = (DEG + (MIN * 1/60) + (SEC * 1/60 * 1/60)) | |
Assumes S/W are negative. | |
""" | |
import re | |
def dms2dec(dms_str): | |
"""Return decimal representation of DMS | |
>>> dms2dec(utf8(48°53'10.18"N)) | |
48.8866111111F | |
>>> dms2dec(utf8(2°20'35.09"E)) | |
2.34330555556F | |
>>> dms2dec(utf8(48°53'10.18"S)) | |
-48.8866111111F | |
>>> dms2dec(utf8(2°20'35.09"W)) | |
-2.34330555556F | |
""" | |
dms_str = re.sub(r'\s', '', dms_str) | |
if re.match('[swSW]', dms_str): | |
sign = -1 | |
else: | |
sign = 1 | |
(degree, minute, second, frac_seconds, junk) = re.split('\D+', dms_str, maxsplit=4) | |
return sign * (int(degree) + float(minute) / 60 + float(second) / 3600 + float(frac_seconds) / 36000) |
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