def spitout(line):
dat=[] # initialize list for dec,inc,slat,slon
line.replace('\t',' ')
rec=line.split() # split each line on space to get records
for element in rec : # step through dec,inc, int
dat.append(float(element)) # append floating point variable to dat list
dec,inc=pmag.vgp_di(dat[0],dat[1],dat[2],dat[3]) # call vgp_di function from pmag module
print '%7.1f %7.1f'%(dec,inc) # print out returned stuff
return dec,inc
def main():
"""
NAME
vgp_di.py
DESCRIPTION
converts site latitude, longitude and pole latitude, longitude to declination, inclination
SYNTAX
vgp_di.py [-h] [-i] [-f FILE] [< filename]
OPTIONS
-h prints help message and quits
-i interactive data entry
-f FILE to specify file name on the command line
INPUT
for file entry:
PLAT PLON SLAT SLON
where:
PLAT: pole latitude
PLON: pole longitude (positive east)
SLAT: site latitude (positive north)
SLON: site longitude (positive east)
OUTPUT
D I
where:
D: declination
I: inclination
"""
if '-h' in sys.argv:
print main.__doc__
sys.exit()
if '-i' in sys.argv: # if one is -i
while 1:
try:
ans=raw_input("Input Pole Latitude [positive north]: <cntrl-D to quit> ")
plat=float(ans) # assign input to plat, after conversion to floating point
ans=raw_input("Input Pole Longitude [positive east]: ")
plon =float(ans)
ans=raw_input("Input Site Latitude: ")
slat =float(ans)
ans=raw_input("Input Site Longitude: ")
slong =float(ans)
dec,inc=pmag.vgp_di(plat,plon,slat,slong) # call vgp_di function from pmag module
print '%7.1f %7.1f'%(dec,inc) # print out returned stuff
except EOFError:
print "\n Good-bye\n"
sys.exit()
elif '-f' in sys.argv: # manual input of file name
ind=sys.argv.index('-f')
file=sys.argv[ind+1]
f=open(file,'rU')
input = f.readlines() # read from standard input
for line in input: # read in the data (as string variable), line by line
dec,inc= spitout(line)
else:
input = sys.stdin.readlines() # read from standard input
for line in input: # read in the data (as string variable), line by line
spitout(line)
def spitout(data):
pole_lat,pole_lon=pmag.bc02(data)
dec,inc=pmag.vgp_di(pole_lat,pole_lon,data[1],data[2])
paleo_lat=pmag.magnetic_lat(inc)
return ' %7.1f %7.1f %7.1f %7.1f %7.1f %7.1f\n' %(data[3],paleo_lat,dec,inc,pole_lat,pole_lon)
