10, #number of air layers, set to 0 to incorporate bathymetry only
res_model=100, # halfspace resistivity value for reference model
n_layers=100, # total number of z layers, including air
z1_layer=10, # first layer thickness
pad_method='stretch', # method for calculating padding
z_mesh_method='new',
z_target_depth=
120000 # depth to bottom of core model (padding after this depth)
)
mo.make_mesh()
mo.write_model_file(save_path=workdir)
# Add topography from EDI data.
# This function takes the same arguments as `add_topography_to_model2`
# but instead of a DEM file it takes a Data object.
mo.add_topography_from_data(do)
mo.write_model_file(save_path=workdir)
# update data elevations
do.project_stations_on_topography(mo)
# show the mesh
mo.plot_sealevel_resistivity()
co = Covariance()
co.smoothing_east = 0.4
co.smoothing_north = 0.4
co.smoothing_z = 0.4
co.write_covariance_file(model_fn=mo.model_fn)
def build_modem_inputfiles(edi_path, output_path):
"""
For a given se to edi files in edi_path, build the ModEM input files into output_path
:param edi_path: # path where edi files are located r'C:\mtpywin\mtpy\examples\data\edi_files_2'
:param output_path: # path to save to r'C:\test\ModEM'
:return:
"""
# not nece os.chdir(r'C:\mtpywin\mtpy') # change this path to the path where mtpy is installed
## period list (won't include periods outside of the range of the edi file) ###
## comment/uncomment your desired method ######################################
###############################################################################
## example to specify start, stop and total number of periods
# start_period = 0.001
# stop_period = 1000
# n_periods = 25
# period_list = np.logspace(np.log10(start_period),
# np.log10(stop_period),
# n_periods)
# example to specify a number of periods per decade
start_period = 0.002
stop_period = 2000
periods_per_decade = 4
period_list = get_period_list(start_period,
stop_period,
periods_per_decade,
include_outside_range=True)
## an example to use the periods from a particular edi file
# edifile_periods = op.join(edipath,'Synth00.edi')
# eobj = Edi(edifile_periods)
# period_list = 1./eobj.freq
###############################################################################
workdir = output_path
edipath = edi_path
# list of edi files, search for all files ending with '.edi'
edi_list = [
op.join(edipath, ff) for ff in os.listdir(edipath)
if (ff.endswith('.edi'))
]
# make the save path if it doesn't exist
if not op.exists(workdir):
os.mkdir(workdir)
do = Data(
edi_list=edi_list,
inv_mode='1',
save_path=workdir,
period_list=period_list,
period_buffer=
2, # factor to stretch interpolation by. For example: if period_buffer=2
# then interpolated data points will only be included if they are
# within a factor of 2 of a true data point
error_type_z=np.array([
['floor_percent', 'floor_egbert'],
# error type, options are 'egbert', 'percent', 'mean_od', 'eigen', 'median', 'off_diagonals'
['floor_egbert', 'percent']
]), # add floor to apply it as an error floor
# can supply a 2 x 2 array for each component or a single value
error_value_z=np.array([
[20., 5.], # error floor value in percent
[5., 20.]
]), # can supply a 2 x 2 array for each component or a single value
error_type_tipper='floor_abs', # type of error to set in tipper,
# floor_abs is an absolute value set as a floor
error_value_tipper=.03,
model_epsg=28354 # model epsg, currently set to utm zone 54.
# See http://spatialreference.org/ to find the epsg code for your projection
)
do.write_data_file()
# set elevations to zero as we need to ensure the stations are on the topography
do.data_array['elev'] = 0.
do.write_data_file(fill=False)
# create model file
mo = Model(
station_locations=do.station_locations,
cell_size_east=8000,
cell_size_north=8000,
pad_north=
7, # number of padding cells in each of the north and south directions
pad_east=7, # number of east and west padding cells
pad_z=6, # number of vertical padding cells
pad_stretch_v=1.6, # factor to increase by in padding cells (vertical)
pad_stretch_h=1.4, # factor to increase by in padding cells (horizontal)
pad_num=
3, # number of constant-width cells to add to outside of model before padding cells start
# this number is currently multiplied by 1.5 internally
n_air_layers=
10, # number of air layers, set to 0 to incorporate bathymetry only
res_model=100, # halfspace resistivity value for reference model
n_layers=100, # total number of z layers, including air
z1_layer=10, # first layer thickness
pad_method='stretch', # method for calculating padding
z_mesh_method='new',
z_target_depth=
120000 # depth to bottom of core model (padding after this depth)
)
mo.make_mesh()
mo.write_model_file(save_path=workdir)
# add topography to res model
# if the number of air layers is zero - bathymetry only will be added.
# if the number of air layers is nonzero - topography will be added, discretised into that number of cells
# mo.add_topography_to_model2(r'C:\mtpywin\mtpy\examples\data\AussieContinent_etopo1.asc')
mo.add_topography_to_model2(
r'C:\Githubz\mtpy\examples\data\AussieContinent_etopo1.asc')
mo.write_model_file(save_path=workdir)
# update data elevations
do.project_stations_on_topography(mo)
# show the mesh
mo.plot_sealevel_resistivity()
co = Covariance()
co.smoothing_east = 0.4
co.smoothing_north = 0.4
co.smoothing_z = 0.4
co.write_covariance_file(model_fn=mo.model_fn)