Fetch data from the internet (fatiando.datasets)

Load datasets from the internet.

CRUST2.0

Load and convert the CRUST2.0 global crustal model (Bassin et al., 2000).

Sample data

Download a Bouguer anomaly map of Alps (EGM 2008 model) in Surfer ASCII grid file format.

  • fetch_bouguer_alps_egm: Download the .grd archive with the Bouguer anomaly of Alps (EGM 2008 model) from the website

References

Bassin, C., Laske, G. and Masters, G., The Current Limits of Resolution for Surface Wave Tomography in North America, EOS Trans AGU, 81, F897, 2000.


fatiando.datasets.crust2_to_tesseroids(fname)[source]

Convert the CRUST2.0 model to tesseroids.

Opens the .tar.gz archive and converts the model to fatiando.mesher.Tesseroid. Each tesseroid will have its props set to the apropriate Vp, Vs and density.

The CRUST2.0 model includes 7 layers: ice, water, soft sediments, hard sediments, upper crust, middle curst and lower crust. It also includes the mantle below the Moho. The mantle portion is not included in this conversion because there is no way to place a bottom on it.

Parameters:

  • fname
    : str

    Name of the model .tar.gz archive (see fetch_crust2)

Returns:

fatiando.datasets.fetch_bouguer_alps_egm(fname='bouguer_alps_egm08.grd')[source]

Download the Bouguer anomaly of Alps (EGM 2008 model) in Surfer ASCII grid file format from https://gist.github.com/leouieda/6023922

Parameters:

  • fname
    : str

    The name that the archive file will be saved when downloaded

Returns:

  • fname
    : str

    The downloaded file name

fatiando.datasets.fetch_crust2(fname='crust2.tar.gz')[source]

Download the CRUST2.0 model from http://igppweb.ucsd.edu/~gabi/crust2.html

Parameters:

  • fname
    : str

    The name that the archive file will be saved when downloaded

Returns:

  • fname
    : str

    The downloaded file name