Deepbedmap Bed Topography

Description: A grid of bed topography from a deep neural network.

Dataset:

Leong, Wei Ji, and Huw Joseph Horgan. “DeepBedMap: A Super-Resolution Neural Network Created Bed Topography of Antarctica.” Zenodo, November 6, 2020. https://doi.org/10.5281/zenodo.4054246.

Associated paper:

Leong, Wei Ji, and Huw Joseph Horgan. “DeepBedMap: A Deep Neural Network for Resolving the Bed Topography of Antarctica.” The Cryosphere 14, no. 11 (November 5, 2020): 3687–3705. https://doi.org/10.5194/tc-14-3687-2020.

%%capture
%load_ext autoreload
%autoreload 2

from polartoolkit import fetch, maps, regions, utils

data = fetch.deepbedmap(
    # available options
    region=regions.minna_bluff,
    # registration ("g" for gridline or "p" for pixel),
)
data

<xarray.DataArray 'z' (y: 760, x: 720)> Size: 2MB
array([[-889., -889., -889., ...,   90.,  104.,  -59.],
       [-891., -890., -890., ..., -100.,   13.,  194.],
       [-892., -892., -891., ...,  187.,  201.,  122.],
       ...,
       [-810., -810., -810., ..., -948., -927., -980.],
       [-809., -809., -809., ..., -945., -928., -931.],
       [-807., -807., -807., ..., -847., -860., -865.]],
      shape=(760, 720), dtype=float32)
Coordinates:
  * y        (y) float64 6kB -1.31e+06 -1.31e+06 ... -1.12e+06 -1.12e+06
  * x        (x) float64 6kB 2.101e+05 2.104e+05 ... 3.896e+05 3.899e+05
Attributes:
    Conventions:   CF-1.7
    title:         Produced by grdcut
    history:       gmt grdcut @GMTAPI@-S-I-G-M-G-N-000000 -G@GMTAPI@-S-O-G-G-...
    description:
    actual_range:  [-1678.  2949.]
    long_name:     z

xarray.DataArray

'z'

• y: 760
• x: 720

• -889.0 -889.0 -889.0 -888.0 -888.0 ... -832.0 -847.0 -860.0 -865.0

  array([[-889., -889., -889., ...,   90.,  104.,  -59.],
         [-891., -890., -890., ..., -100.,   13.,  194.],
         [-892., -892., -891., ...,  187.,  201.,  122.],
         ...,
         [-810., -810., -810., ..., -948., -927., -980.],
         [-809., -809., -809., ..., -945., -928., -931.],
         [-807., -807., -807., ..., -847., -860., -865.]],
        shape=(760, 720), dtype=float32)

• Coordinates: (2)
  • y
    (y)
    float64
    -1.31e+06 -1.31e+06 ... -1.12e+06

    long_name :

    y

    axis :

    Y

    actual_range :

    [-1310000. -1120000.]

    array([-1309875., -1309625., -1309375., ..., -1120625., -1120375., -1120125.],
          shape=(760,))

  • x
    (x)
    float64
    2.101e+05 2.104e+05 ... 3.899e+05

    long_name :

    x

    axis :

    X

    actual_range :

    [210000. 390000.]

    array([210125., 210375., 210625., ..., 389375., 389625., 389875.], shape=(720,))

• Indexes: (2)
  • y
    PandasIndex

    PandasIndex(Index([-1309875.0, -1309625.0, -1309375.0, -1309125.0, -1308875.0, -1308625.0,
           -1308375.0, -1308125.0, -1307875.0, -1307625.0,
           ...
           -1122375.0, -1122125.0, -1121875.0, -1121625.0, -1121375.0, -1121125.0,
           -1120875.0, -1120625.0, -1120375.0, -1120125.0],
          dtype='float64', name='y', length=760))

  • x
    PandasIndex

    PandasIndex(Index([210125.0, 210375.0, 210625.0, 210875.0, 211125.0, 211375.0, 211625.0,
           211875.0, 212125.0, 212375.0,
           ...
           387625.0, 387875.0, 388125.0, 388375.0, 388625.0, 388875.0, 389125.0,
           389375.0, 389625.0, 389875.0],
          dtype='float64', name='x', length=720))

• Attributes: (6)

  Conventions :

  CF-1.7

  title :

  Produced by grdcut

  history :

  gmt grdcut @GMTAPI@-S-I-G-M-G-N-000000 -G@GMTAPI@-S-O-G-G-G-Y-000001 -N -R210000.0/390000.0/-1310000.0/-1120000.0 -Vw

  description :

  actual_range :

  [-1678. 2949.]

  long_name :

  z

_ = utils.get_grid_info(data, print_info=True)

grid spacing: 250.0 m
grid region: (210000.0, 390000.0, -1310000.0, -1120000.0)
grid zmin: -1678.0
grid zmax: 2949.0
grid registration: p

fig = maps.plot_grd(
    data,
    title="DeepBedMap Bed Topography",
    coast=True,
    cbar_label="meters",
    hist=True,
    robust=True,
    cmap="rain",
    reverse_cpt=True,
    hemisphere="south",
)

fig.show(dpi=200)