def run(title):
    if title == 'Migration':
        result = gravmag.imaging.migrate(xp, yp, zp, gz, bounds[-2], bounds[-1],
            meshshape, power=0.5)
    elif title == 'Generalized Inverse':
        result = gravmag.imaging.geninv(xp, yp, zp, gz, meshshape[1:],
            bounds[-2], bounds[-1], meshshape[0])
    elif title == 'Sandwich':
        result = gravmag.imaging.sandwich(xp, yp, zp, gz, meshshape[1:],
            bounds[-2], bounds[-1], meshshape[0], power=0.5)
    # Plot the results
    myv.figure()
    myv.polyprisms(prisms, 'density', style='wireframe', linewidth=2)
    myv.prisms(result, 'density', edges=False)
    axes = myv.axes(myv.outline(), ranges=[b*0.001 for b in bounds],
        fmt='%.0f')
    myv.wall_bottom(axes.axes.bounds)
    myv.wall_north(axes.axes.bounds)
    myv.title(title)
    myv.show()
area = bounds[:4]
axis = mpl.figure().gca()
mpl.axis('scaled')
model = [
    mesher.PolygonalPrism(
        mpl.draw_polygon(area, axis, xy2ne=True),
        # Use only induced magnetization
        0, 2000, {'magnetization':2})]
# Calculate the effect
shape = (100, 100)
xp, yp, zp = gridder.regular(area, shape, z=-500)
tf = polyprism.tf(xp, yp, zp, model, inc, dec)
# and plot it
mpl.figure()
mpl.axis('scaled')
mpl.title("Total field anomalyproduced by prism model (nT)")
mpl.contourf(yp, xp, tf, shape, 20)
mpl.colorbar()
for p in model:
    mpl.polygon(p, '.-k', xy2ne=True)
mpl.set_area(area)
mpl.m2km()
mpl.show()
# Show the prisms
myv.figure()
myv.polyprisms(model, 'magnetization')
myv.axes(myv.outline(bounds), ranges=[i*0.001 for i in bounds])
myv.wall_north(bounds)
myv.wall_bottom(bounds)
myv.show()
Beispiel #3
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"""
Meshing: Make and plot a 3D prism mesh
"""
from fatiando import mesher
from fatiando.vis import myv

mesh = mesher.PrismMesh(bounds=(-2, 2, -3, 3, 0, 1), shape=(4, 4, 4))

myv.figure()
plot = myv.prisms(mesh)
axes = myv.axes(plot)
myv.show()
from fatiando.mesher import Tesseroid
from fatiando.vis import mpl, myv

log = logger.get()
log.info(logger.header())

# Get the data from their website and convert it to tesseroids
# Will download the archive and save it with the default name
log.info("Fetching CRUST2.0 model")
archive = io.fetch_crust2()
log.info("Converting to tesseroids")
model = io.crust2_to_tesseroids(archive)
log.info('  model size: %d' % (len(model)))

# Plot the tesseroid model
myv.figure(zdown=False)
myv.tesseroids(model, 'density')
myv.continents(linewidth=3)
myv.show()

# Make the computation grid
area = (-180, 180, -80, 80)
shape = (100, 100)
lons, lats, heights = gridder.regular(area, shape, z=250000)

# Divide the model into nproc slices and calculate them in parallel
log.info('Calculating...')
def calculate(chunk):
    return gravmag.tesseroid.gz(lons, lats, heights, chunk)
def split(model, nproc):
    chunksize = len(model)/nproc
Beispiel #5
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"""
from __future__ import print_function
from fatiando.mesher import PrismMesh
from fatiando.vis import myv

mesh = PrismMesh(bounds=(0, 100, 0, 200, 0, 150), shape=(5, 6, 7))
# We'll give each prism a density value corresponding to it's index on the
# mesh. Notice that meshes take lists/arrays as their property values
mesh.addprop('density', list(range(mesh.size)))

# You can iterate over meshes like lists of elements
for p in mesh:
    print(p.props['density'], end=' ')

scene = myv.figure(size=(600, 600))
# Because you can iterate over a mesh, you can pass it anywhere a list of
# prisms is accepted
plot = myv.prisms(mesh, prop='density')
# The code below enables and configures the color bar. This will be automated
# on a function in the future (write to the mailing list if you'd like to help
# out!)
plot.module_manager.scalar_lut_manager.show_scalar_bar = True
plot.module_manager.scalar_lut_manager.lut_mode = 'Greens'
plot.module_manager.scalar_lut_manager.reverse_lut = True
plot.module_manager.scalar_lut_manager.label_text_property.color = (0, 0, 0)
plot.module_manager.scalar_lut_manager.title_text_property.color = (0, 0, 0)
plot.module_manager.scalar_lut_manager.scalar_bar_representation.position = \
    [0.9, 0.4]
plot.module_manager.scalar_lut_manager.scalar_bar_representation.position2 = \
    [0.1, 0.6]
from fatiando import gridder
from fatiando.gravmag import prism, harvester
from fatiando.mesher import Prism, PrismMesh
from fatiando.vis import myv

model = [Prism(200, 800, 400, 600, 200, 400, {'density': 1000})]
shape = (20, 20)
bounds = [0, 1000, 0, 1000, 0, 1000]
area = bounds[0:4]
x, y, z = gridder.regular(area, shape, z=-1)
gz = prism.gz(x, y, z, model)
mesh = PrismMesh(bounds, (10, 10, 10))
data = [harvester.Gz(x, y, z, gz)]
seeds = harvester.sow([[500, 500, 250, {'density': 1000}]], mesh)

fig = myv.figure(size=(700, 700))
plot = myv.prisms(model, style='wireframe', linewidth=4)
plot.actor.mapper.scalar_visibility = False
myv.prisms(seeds, 'density')
myv.outline(bounds)
myv.wall_bottom(bounds)
myv.wall_east(bounds)
for update in harvester.iharvest(data, seeds, mesh, compactness=0.5,
                                 threshold=0.001):
    best, neighborhood = update[2:4]
    if best is not None:
        myv.prisms([mesh[best.i]])
        plot = myv.prisms(
            [mesh[n] for neighbors in neighborhood for n in neighbors],
            style='wireframe')
        plot.actor.mapper.scalar_visibility = False
"""
Meshing: Make and plot a tesseroid mesh with topography
"""
from fatiando import gridder, utils, mesher
from fatiando.vis import myv

w, e = -2, 2
s, n = -2, 2
bounds = (w, e, s, n, 500000, 0)

x, y = gridder.regular((w, e, s, n), (50, 50))
height = (250000 +
          -100000*utils.gaussian2d(x, y, 1, 5, x0=-1, y0=-1, angle=-60) +
          250000*utils.gaussian2d(x, y, 1, 1, x0=0.8, y0=1.7))

mesh = mesher.TesseroidMesh(bounds, (20, 50, 50))
mesh.carvetopo(x, y, height)

scene = myv.figure(zdown=False)
myv.tesseroids(mesh)
myv.earth(opacity=0.3)
myv.continents()
scene.scene.camera.position = [21592740.078245595, 22628783.944262519, -28903782.916664094]
scene.scene.camera.focal_point = [5405474.2152075395, -1711034.715136874, 2155879.3486608281]
scene.scene.camera.view_angle = 1.6492674416639987
scene.scene.camera.view_up = [0.91713422625547714, -0.1284658947859818, 0.37730799740742887]
scene.scene.camera.clipping_range = [20169510.286021926, 69721043.718536735]
scene.scene.camera.compute_view_plane_normal()
scene.scene.render()
myv.show()
Beispiel #8
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"""
GravMag: Forward modeling of the gravitational potential and its derivatives
using tesseroids
"""
import time
from fatiando import gravmag, gridder, utils
from fatiando.mesher import Tesseroid
from fatiando.vis import mpl, myv

model = [
    Tesseroid(-60, -55, -30, -27, 0, -500000, props={'density': 200}),
    Tesseroid(-66, -62, -18, -12, 0, -300000, props={'density': -500})
]
# Show the model before calculating
scene = myv.figure(zdown=False)
myv.tesseroids(model, 'density')
myv.continents(linewidth=2)
myv.earth(opacity=0.8)
myv.meridians(range(0, 360, 45), opacity=0.2)
myv.parallels(range(-90, 90, 45), opacity=0.2)
scene.scene.camera.position = [
    23175275.131412581, -16937347.013663091, -4924328.2822419703
]
scene.scene.camera.focal_point = [0.0, 0.0, 0.0]
scene.scene.camera.view_angle = 30.0
scene.scene.camera.view_up = [
    0.083030001958377356, -0.17178720527713925, 0.98162883763562181
]
scene.scene.camera.clipping_range = [9229054.5133903362, 54238225.321054712]
scene.scene.camera.compute_view_plane_normal()
scene.scene.render()
Beispiel #9
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"""
Vis: Set the colors in figures, prisms, polygonal prisms and tesseroids.
"""
from fatiando.mesher import Prism, PolygonalPrism, Tesseroid
from fatiando.vis import myv

prism = Prism(1, 2, 1, 2, 0, 1, {'density': 1})
polyprism = PolygonalPrism([[3, 1], [4, 2], [5, 1]], -1, 2, {'density': 2})
tesseroid = Tesseroid(10, 20, 50, 60, 10**6, 0)

red, green, blue = (1, 0, 0), (0, 1, 0), (0, 0, 1)
white, black = (1, 1, 1), (0, 0, 0),

myv.figure()
# Make the prism red with blue edges, despite its density
myv.prisms([prism], 'density', color=red, edgecolor=blue)
# and the polyprism green with blue edges
myv.title('Body + edge colors')

myv.figure()
# For wireframes, color is usually set by the density.
# Overwrite this by setting *color*
# *edgecolor* is ignored
myv.polyprisms([polyprism],
               'density',
               style='wireframe',
               color=green,
               edgecolor=red,
               linewidth=2)
myv.title('Wireframe colors')
Beispiel #10
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"""
Meshing: Make and plot a tesseroid mesh
"""
from fatiando import mesher
from fatiando.vis import myv

mesh = mesher.TesseroidMesh((-60, 60, -30, 30, 100000, -500000), (10, 10, 10))

myv.figure(zdown=False)
myv.tesseroids(mesh)
myv.earth(opacity=0.3)
myv.continents()
myv.meridians(range(-180, 180, 30))
myv.parallels(range(-90, 90, 30))
myv.show()
Beispiel #11
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"""
from fatiando import gridder, gravmag
from fatiando.mesher import Prism, PrismMesh
from fatiando.vis import myv

model = [Prism(200, 800, 400, 600, 200, 400, {'density': 1000})]
shape = (20, 20)
bounds = [0, 1000, 0, 1000, 0, 1000]
area = bounds[0:4]
x, y, z = gridder.regular(area, shape, z=-1)
gz = gravmag.prism.gz(x, y, z, model)
mesh = PrismMesh(bounds, (10, 10, 10))
data = [gravmag.harvester.Gz(x, y, z, gz)]
seeds = gravmag.harvester.sow([[500, 500, 250, {'density': 1000}]], mesh)

fig = myv.figure(size=(700, 700))
plot = myv.prisms(model, style='wireframe', linewidth=4)
plot.actor.mapper.scalar_visibility = False
myv.prisms(seeds, 'density')
myv.outline(bounds)
myv.wall_bottom(bounds)
myv.wall_east(bounds)
for update in gravmag.harvester.iharvest(data,
                                         seeds,
                                         mesh,
                                         compactness=0.5,
                                         threshold=0.001):
    best, neighborhood = update[2:4]
    if best is not None:
        myv.prisms([mesh[best.i]])
        plot = myv.prisms(
Beispiel #12
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"""
Vis: Set the colors in figures, prisms, polygonal prisms and tesseroids.
"""
from fatiando.mesher import Prism, PolygonalPrism, Tesseroid
from fatiando.vis import myv

prism = Prism(1, 2, 1, 2, 0, 1, {'density': 1})
polyprism = PolygonalPrism([[3, 1], [4, 2], [5, 1]], -1, 2, {'density': 2})
tesseroid = Tesseroid(10, 20, 50, 60, 10 ** 6, 0)

red, green, blue = (1, 0, 0), (0, 1, 0), (0, 0, 1)
white, black = (1, 1, 1), (0, 0, 0),

myv.figure()
# Make the prism red with blue edges, despite its density
myv.prisms([prism], 'density', color=red, edgecolor=blue)
# and the polyprism green with blue edges
myv.title('Body + edge colors')

myv.figure()
# For wireframes, color is usually set by the density.
# Overwrite this by setting *color*
# *edgecolor* is ignored
myv.polyprisms([polyprism], 'density', style='wireframe', color=green,
               edgecolor=red, linewidth=2)
myv.title('Wireframe colors')

# Black background, white lines, green tesseroid
myv.figure(zdown=False, color=black)
myv.earth()
myv.continents(color=white)