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Merge pull request #224 from rmodrak/master
Group velocity window selection
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Original file line number | Diff line number | Diff line change |
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import numpy as np | ||
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from matplotlib import pyplot | ||
from obspy.geodetics import gps2dist_azimuth | ||
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def station_label_writer(ax, station, origin, units='km'): | ||
""" Displays station id, distance, and azimuth to the left of current axes | ||
""" | ||
distance_in_m, azimuth, _ = gps2dist_azimuth( | ||
origin.latitude, | ||
origin.longitude, | ||
station.latitude, | ||
station.longitude) | ||
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# construct station label | ||
if len(station.location) > 1: | ||
label = station.network + '.' + station.station + '.' + station.location | ||
else: | ||
label = station.network + '.' + station.station | ||
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# display station label | ||
pyplot.text(0.2,0.50, label, fontsize=11, transform=ax.transAxes) | ||
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# display distance | ||
if units=='m': | ||
label = '%d m' % round(distance_in_m) | ||
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elif units=='km': | ||
label = '%d km' % round(distance_in_m/1000.) | ||
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elif units=='deg': | ||
label = '%d%s' % (round(m_to_deg(distance_in_m)), u'\N{DEGREE SIGN}') | ||
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pyplot.text(0.2,0.35, label, fontsize=11, transform=ax.transAxes) | ||
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# display azimuth | ||
azimuth = '%d%s' % (round(azimuth), u'\N{DEGREE SIGN}') | ||
pyplot.text(0.2,0.20, azimuth, fontsize=11, transform=ax.transAxes) | ||
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def trace_label_writer(axis, dat, syn, total_misfit=1.): | ||
""" Displays cross-correlation time shift and misfit information below trace | ||
""" | ||
ymin = axis.get_ylim()[0] | ||
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s = syn.data | ||
d = dat.data | ||
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# display cross-correlation time shift | ||
time_shift = 0. | ||
time_shift += _getattr(syn, 'time_shift', np.nan) | ||
time_shift += _getattr(dat, 'static_time_shift', 0) | ||
axis.text(0.,(1/4.)*ymin, '%.2f' %time_shift, fontsize=11) | ||
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# display maximum cross-correlation coefficient | ||
Ns = np.dot(s,s)**0.5 | ||
Nd = np.dot(d,d)**0.5 | ||
if Ns*Nd > 0.: | ||
max_cc = np.correlate(s, d, 'valid').max() | ||
max_cc /= (Ns*Nd) | ||
axis.text(0.,(2/4.)*ymin, '%.2f' %max_cc, fontsize=11) | ||
else: | ||
max_cc = np.nan | ||
axis.text(0.,(2/4.)*ymin, '%.2f' %max_cc, fontsize=11) | ||
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# display percent of total misfit | ||
misfit = _getattr(syn, 'misfit', np.nan) | ||
misfit /= total_misfit | ||
if misfit >= 0.1: | ||
axis.text(0.,(3/4.)*ymin, '%.1f' %(100.*misfit), fontsize=11) | ||
else: | ||
axis.text(0.,(3/4.)*ymin, '%.2f' %(100.*misfit), fontsize=11) | ||
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# | ||
# utility functions | ||
# | ||
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def _getattr(trace, name, *args): | ||
if len(args)==1: | ||
if not hasattr(trace, 'attrs'): | ||
return args[0] | ||
else: | ||
return getattr(trace.attrs, name, args[0]) | ||
elif len(args)==0: | ||
return getattr(trace.attrs, name) | ||
else: | ||
raise TypeError("Wrong number of arguments") | ||
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