/[escript]/trunk/doc/examples/inversion/grav_netcdf.py
ViewVC logotype

Contents of /trunk/doc/examples/inversion/grav_netcdf.py

Parent Directory Parent Directory | Revision Log Revision Log


Revision 5707 - (show annotations)
Mon Jun 29 03:59:06 2015 UTC (3 years, 6 months ago) by sshaw
File MIME type: text/x-python
File size: 3200 byte(s)
adding copyright headers to files without copyright info, moved header to top of file in some cases where it wasn't
1 ##############################################################################
2 #
3 # Copyright (c) 2009-2015 by The University of Queensland
4 # http://www.uq.edu.au
5 #
6 # Primary Business: Queensland, Australia
7 # Licensed under the Open Software License version 3.0
8 # http://www.opensource.org/licenses/osl-3.0.php
9 #
10 # Development until 2012 by Earth Systems Science Computational Center (ESSCC)
11 # Development 2012-2013 by School of Earth Sciences
12 # Development from 2014 by Centre for Geoscience Computing (GeoComp)
13 #
14 ##############################################################################
15
16 """3D gravity inversion example using netCDF data"""
17 from __future__ import division, print_function
18
19 __copyright__="""Copyright (c) 2009-2015 by The University of Queensland
20 http://www.uq.edu.au
21 Primary Business: Queensland, Australia"""
22 __license__="""Licensed under the Open Software License version 3.0
23 http://www.opensource.org/licenses/osl-3.0.php"""
24 __url__="https://launchpad.net/escript-finley"
25
26 # Import required modules
27 from esys.downunder import *
28 from esys.weipa import *
29 from esys.escript import unitsSI as U
30 from esys.escript import saveDataCSV,getEscriptParamInt
31
32
33 haveNetcdf=(getEscriptParamInt("NETCDF_BUILD",0)==1)
34
35 # Set parameters
36 DATASET = 'data/GravitySmall.nc'
37 DATA_UNITS = 1e-6 * U.m/(U.sec**2)
38 PAD_X = 0.2
39 PAD_Y = 0.2
40 thickness = 40. * U.km
41 l_air = 6. * U.km
42 n_cells_v = 15
43 MU = 0.1
44
45 COORDINATES=CartesianReferenceSystem()
46 #COORDINATES=WGS84ReferenceSystem()
47
48 # Setup and run the inversion
49 def work():
50 source=NetCdfData(NetCdfData.GRAVITY, DATASET, scale_factor=DATA_UNITS, reference_system=COORDINATES)
51 db=DomainBuilder(dim=3, reference_system=COORDINATES)
52 db.addSource(source)
53 db.setVerticalExtents(depth=thickness, air_layer=l_air, num_cells=n_cells_v)
54 db.setFractionalPadding(pad_x=PAD_X, pad_y=PAD_Y)
55 db.fixDensityBelow(depth=thickness)
56
57 inv=GravityInversion()
58 inv.setSolverTolerance(1e-4)
59 inv.setSolverMaxIterations(50)
60 inv.setup(db)
61 inv.getCostFunction().setTradeOffFactorsModels(MU)
62
63 density = inv.run()
64 print("density = %s"%density)
65
66 g, w = db.getGravitySurveys()[0]
67 saveVoxet("result.vo", density=density)
68 if saveSilo("result_gravity.silo", density=density, gravity_anomaly=g, gravity_weight=w):
69 print("Results saved in result_gravity.silo")
70 else:
71 print("Failed to save result_gravity.silo. Possibly no Silo support.")
72
73 saveVTK("result_gravity.vtu", density=density, gravity_anomaly=g, gravity_weight=w)
74 print("Results saved in result_gravity.vtu")
75
76 saveDataCSV("result_gravity.csv", density=density, x=density.getFunctionSpace().getX())
77 print("Results saved in result_gravity.csv")
78
79 print("All done. Have a nice day!")
80
81 try:
82 import pyproj
83 except ImportError:
84 print("This example requires pyproj to be installed.")
85 import sys
86 sys.exit(0)
87
88 try:
89 import esys.ripley
90 HAVE_RIPLEY = True
91 except ImportError:
92 HAVE_RIPLEY = False
93
94 if 'NetCdfData' not in dir():
95 print("This example requires scipy's netcdf support which does not appear to be installed.")
96 elif not HAVE_RIPLEY:
97 print("Ripley module not available")
98 elif not haveNetcdf:
99 print("netCDF not available.")
100 else:
101 work()
102

  ViewVC Help
Powered by ViewVC 1.1.26