##### https://github.com/geodynamics/citcoms
Tip revision: 93827a4
zslice.py
``````#!/usr/bin/env python
#
# ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
#
#
# CitcomS.py by Eh Tan, Eun-seo Choi, and Pururav Thoutireddy.
# Copyright (C) 2002-2005, California Institute of Technology.
#
# This program is free software; you can redistribute it and/or modify
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
#
#
# ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
#

"""
Slice horizontal layer(s) from CitcomS output (from batchcombine.py).
Also convert the (x, y) coordinate to (lon, lat).

usage:
zslice(prefix, layer1 [,layer2 [,...]] )
-- slice the specified layer(s)
layer# : layer(s) to plot (count from 0)

zslice(prefix)
-- slice all layers

It can be used in the command line as well.

input:
prefix
outout:
prefix.z###
"""

all = ('zslice', 'zslicefile')

def zslicefile(prefix, layer):
return '%s.z%03d' % (prefix, layer)

def zslice(prefix, *ilayers):

from math import pi
r2d = 180.0 / pi

infile = open(prefix)
nodez = int(nodez)
#print nodez, ilayers

## validate ilayers
layers = check_layers(ilayers, nodez)
nlayer = len(layers)

## allocate arrays
output = range(nlayer)
lines = range(nodez)

## open output files
for i in range(nlayer):
zfile = zslicefile(prefix, layers[i])
output[i] = open(zfile, 'w')

try:
while 1:
for j in range(nodez):

## file is empty or EOF?
if not lines[nodez-1]:
break

for i in range(nlayer):
layer = layers[i]

## spilt the first 3 columns only, the rest will be
## output as-is
data = lines[layer].split(' ', 3)
lat = 90 - float(data[0])*r2d
lon = float(data[1])*r2d
output[i].write( '%f %f %s' % (lon, lat, data[3]) )

infile.close()

finally:
for i in range(nlayer):
output[i].close()

return

def check_layers(layers, nodez):
if layers == ():
## if empty, we will slice every layer
layers = range(nodez)
else:
## otherwise, check bounds of layers
for layer in layers:
if not (0<= layer < nodez):
raise ValueError, 'layer out of range (0-%d)' % (nodez - 1)

return layers

## if run as a script
if __name__ == '__main__':
import sys

if len(sys.argv) < 2:
print __doc__
sys.exit(1)

prefix = sys.argv[1]
layers = [ int(x) for x in sys.argv[2:] ]

zslice(prefix, *layers)

# version
# \$Id\$

# End of file
``````