Created
September 17, 2015 18:37
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plot a merged port and sidescan, cropping to a user-specified maximum range
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import matplotlib.pyplot as plt | |
import os | |
import numpy as np | |
from scipy.io import loadmat | |
sonpath = '/home/mydata/sonpath' | |
humfile = '/home/mydata/humfile.DAT' | |
# maximum range in m to shwo | |
maxy = 35 | |
# if son path name supplied has no separator at end, put one on | |
if sonpath[-1]!=os.sep: | |
sonpath = sonpath + os.sep | |
base = humfile.split('.DAT') # get base of file name for output | |
base = base[0].split(os.sep)[-1] | |
# remove underscores, negatives and spaces from basename | |
if base.find('_')>-1: | |
base = base[:base.find('_')] | |
if base.find('-')>-1: | |
base = base[:base.find('-')] | |
if base.find(' ')>-1: | |
base = base[:base.find(' ')] | |
if base.find('.')>-1: | |
base = base[:base.find('.')] | |
meta = loadmat(os.path.normpath(os.path.join(sonpath,base+'meta.mat'))) | |
shape_port = np.squeeze(meta['shape_port']) | |
shape_star = np.squeeze(meta['shape_star']) | |
with open(os.path.normpath(os.path.join(sonpath,base+'_data_port_lw.dat')), 'r') as ff: | |
port_fpw = np.memmap(ff, dtype='float32', mode='r', shape=tuple(shape_port)) | |
with open(os.path.normpath(os.path.join(sonpath,base+'_data_star_lw.dat')), 'r') as ff: | |
star_fpw = np.memmap(ff, dtype='float32', mode='r', shape=tuple(shape_star)) | |
Zdist = meta['dist_m'] | |
extent = shape_port[0] | |
ft = np.squeeze(1/meta['pix_m']) | |
fig = plt.figure() | |
plt.imshow(np.vstack((np.flipud(port_fpw), star_fpw)), cmap='gray', extent=[np.min(Zdist), np.max(Zdist), -extent*(1/ft), extent*(1/ft)]) | |
plt.ylabel('Range (m)'), plt.xlabel('Distance along track (m)') | |
plt.axis('normal'); plt.axis('tight') | |
plt.ylim(-maxy, maxy) | |
plt.savefig(os.path.normpath(os.path.join(sonpath,'merged_cropped')),bbox_inches='tight',dpi=400) | |
del fig |
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