-
Notifications
You must be signed in to change notification settings - Fork 14
/
pySeismicFMM3D.py
186 lines (149 loc) · 6.97 KB
/
pySeismicFMM3D.py
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
import numpy
import FMM3D
import matplotlib.pyplot as plt
import time
from geopy.distance import great_circle
class SeismicFMM3D():
def __init__(self):
print('FMM 3D initiated')
def SetModelSize(self, lat, lon, z):
self.size_lat = lat
self.size_lon = lon
self.size_z = z
def SetGridSize(self, dlat, dlon, dz):
self.dlat = dlat;
self.dlon = dlon;
self.dz = dz;
def CreateCalculationVariables(self):
self.time = numpy.zeros(self.model_velocity.shape, dtype=numpy.single)
self.accepted = numpy.zeros(self.model_velocity.shape, dtype=numpy.bool)
self.trace = numpy.zeros(self.model_velocity.shape, dtype=numpy.int32)
def __ReadBinaryFile(file, size, dtype):
return numpy.fromfile(file, dtype=dtype).reshape(size, order='F')
def ReadVelocityModel(self, file, dtype=numpy.single):
print('Reading velocity model from {0:s}..'.format(file), end='\t', flush=True)
self.model_velocity = SeismicFMM3D.__ReadBinaryFile(file, (self.size_lat, self.size_lon, self.size_z), dtype)
print('done.', flush=True)
def SetVelocityModel(self, M):
self.model_velocity = M
def ReadModel(self, file, dtype=numpy.single):
print('Reading model from {0:s}..'.format(file), end='\t', flush=True)
self.model = SeismicFMM3D.__ReadBinaryFile(file, (self.size_lat, self.size_lon, self.size_z), dtype)
print('done.', flush=True)
def SetModel(self, M):
self.model = M
def ReadTime(self, file, dtype=numpy.single):
print('Reading time from {0:s}..'.format(file), end='\t', flush=True)
self.time = SeismicFMM3D.__ReadBinaryFile(file, (self.size_lat, self.size_lon, self.size_z), dtype)
print('done.', flush=True)
def SetTime(self, T):
self.time = T
def ReadLatVector(self, file, dtype=numpy.single):
print('Reading latitude vector from {0:s}..'.format(file), end='\t', flush=True)
self.lat = SeismicFMM3D.__ReadBinaryFile(file, (self.size_lat), dtype)
print('done.', flush=True)
def SetLatVector(self, V):
self.lat = V
def ReadLonVector(self, file, dtype=numpy.single):
print('Reading longitude vector from {0:s}..'.format(file), end='\t', flush=True)
self.lon = SeismicFMM3D.__ReadBinaryFile(file, (self.size_lon), dtype)
print('done.', flush=True)
def SetLonVector(self, V):
self.lon = V
def ReadHVector(self, file, dtype=numpy.single):
print('Reading depth vector from {0:s}..'.format(file), end='\t', flush=True)
self.H = SeismicFMM3D.__ReadBinaryFile(file, (self.size_z), dtype)
print('done.', flush=True)
def SetHVector(self, V):
self.H = V
def GetVelocityAtXYZ(self, lat, lon, z):
return self.model_velocity[lon,lat,z]
def SetSource(self, lat, lon, z):
self.time[lon,lat,z] = 10e-6
def SetSourceGeo(self, source_lat, source_lon, source_ele):
#source_lat = 54.07505;
#source_lon = 17.63717;
#source_ele = 195;
La, Lo = numpy.meshgrid(self.lat, self.lon)
D = numpy.zeros_like(La)
for a in range(self.size_lat):
for b in range(self.size_lon):
D[b,a] = great_circle((source_lat, source_lon), (self.lat[a], self.lon[b])).meters
D2 = D.copy()
D2 = D2.reshape(self.size_lat * self.size_lon)
D2.sort()
idx1 = D<D2[4]
idx2 = numpy.abs(self.H - source_ele) <= self.dz
selected_lat = La[idx1]
selected_lon = Lo[idx1]
selected_ele = self.H[idx2]
for a in range(len(selected_lat)):
for b in range(len(selected_ele)):
distance = ((great_circle((source_lat, source_lon), (selected_lat[a], selected_lon[a])).meters)**2+(source_ele-selected_ele[b])**2)**.5
v = numpy.squeeze(self.model_velocity[self.lat==selected_lat[a], self.lon==selected_lon[a], self.H == selected_ele[b]]);
print(selected_lat[a], selected_lon[a], selected_ele[b], distance, v, sep='\t')
if v > 0:
self.time[self.lat==selected_lat[a], self.lon==selected_lon[a], self.H == selected_ele[b]] = distance / v
#print(self.time[self.time>0])
def SaveTime(self, file):
print('Saving result to file {0:s}..'.format(file), end='\t', flush=True)
self.time.reshape((self.size_lon * self.size_lat * self.size_z), order='F').tofile(file)
print('done.', flush=True)
def ReadTime(self, file, dtype=numpy.single):
print('Reading time from {0:s}..'.format(file), end='\t', flush=True)
self.time = SeismicFMM3D.__ReadBinaryFile(file, (self.size_lat, self.size_lon, self.size_z), dtype)
print('done.', flush=True)
def SaveTrace(self, file):
print('Saving result to file {0:s}..'.format(file), end='\t', flush=True)
self.trace.reshape((self.size_lon * self.size_lat * self.size_z), order='F').tofile(file)
print('done.', flush=True)
def Do(self, N, order='F'):
print('Setting model size and grid size...', end='\t', flush=True)
FMM3D.SetModelSize(self.size_lat, self.size_lon, self.size_z, self.dlat, self.dlon, self.dz)
print('done.', flush=True)
print('Preparing for FMM calculation...', end='\t', flush=True)
self.model_velocity = self.model_velocity.reshape((self.size_lon * self.size_lat * self.size_z), order=order)
self.time = self.time.reshape((self.size_lon * self.size_lat * self.size_z), order=order)
self.accepted = self.accepted.reshape((self.size_lon * self.size_lat * self.size_z), order=order)
self.trace = self.trace.reshape((self.size_lon * self.size_lat * self.size_z), order=order)
print('done.', flush=True)
print('++ FMM START ++', flush=True)
start_time = time.time()
FMM3D.FMM3D(self.model_velocity, self.time, self.accepted, self.lat, self.lon, self.H, self.trace, int(N))
end_time = time.time()
print('++ FMM FINISH in {0:10.6f}s ++'.format(end_time - start_time), flush=True)
print('Preparing data after FMM calculation...', end='\t', flush=True)
self.model_velocity = self.model_velocity.reshape((self.size_lat, self.size_lon, self.size_z),order=order)
self.time = self.time.reshape((self.size_lat, self.size_lon, self.size_z), order=order)
self.accepted = self.accepted.reshape((self.size_lat, self.size_lon, self.size_z), order=order)
self.trace = self.trace.reshape((self.size_lat, self.size_lon, self.size_z), order=order)
print('done.', flush=True)
def Plot(self):
plt.imshow(self.time[:,:,300])
plt.show()
def GetTimeGeo(self, lat, lon, ele):
xi = numpy.argmin(abs(self.lat-lat))
yi = numpy.argmin(abs(self.lon-lon))
zi = numpy.argmin(abs(self.H-ele))
#print(xi,yi,zi,self.time[xi,yi,zi])
min_time_val = 10e9#self.time[xi,yi,zi]
xm = xi
ym = yi
zm = zi
for x in range(xi-1,xi+2):
for y in range(yi-1,yi+2):
for z in range(zi-1,zi+2):
#print("\t",x,y,z, self.time[x,y,z])
if self.time[x,y,z] > 0:
if self.time[x,y,z] < min_time_val:
min_time_val = self.time[x,y,z]
xm = x
ym = y
zm = z
#print("\t\t",self.time[xm,ym,zm],self.model_velocity[xm,ym,zm])
distancev = great_circle((self.lat[xm], self.lon[ym]), (lat, lon)).meters
distanceh = abs(self.H[zm] - ele)
distance = numpy.sqrt(distanceh**2+distancev**2)
time = distance/self.model_velocity[xm,ym,zm]
#print(distance,time,self.model_velocity[xi,yi,zi])
return self.time[xm,ym,zm] + time