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        "description": "# litho1pt0\n\nA Python interface to TRIPACK and STRIPACK Fortran code for (constrained) triangulation in Cartesian coordinates and on a sphere. Stripy is an object-oriented package and includes routines from SRFPACK and SSRFPACK for interpolation (nearest neighbor, linear and hermite cubic) and to evaluate derivatives (Renka 1996a,b and 1997a,b).\n\n`stripy` is bundled with `litho1pt0` which is a python interface to the _crust 1.0_ dataset and the lithospheric part of the _litho 1.0_ dataset (Laske et al, 2013 and Pasyanos et al, 2014) which both requires and demonstrates the triangulation / searching and interpolation on the sphere that is provided by `stripy`.\n\n\n![Examples](https://github.com/University-of-Melbourne-Geodynamics/stripy/blob/master/Notebooks/Images/Examples.png?raw=true)\n\n\n_Sample images created with `stripy` illustrating the meshing capability, the ability to refine meshes to match criteria such as data density, and the ability to create distance-weighted averages to meshes and continuous interpolating functions_\n\n#### binder\n\nLaunch the demonstration at [mybinder.org](https://mybinder.org/v2/gh/lmoresi/stripy-binder/master)\n\n[![Binder](https://mybinder.org/badge.svg)](https://mybinder.org/v2/gh/lmoresi/stripy-binder/master)\n\n\n## Navigation / Notebooks\n\n\nThere are two matching sets of `stripy` notebooks - one set for [Cartesian Triangulations](#Cartesian) and one for [Spherical Triangulations](#Spherical). For most geographical applications, the spherical triangulations are the natural choice as they expect longitude and latitude coordinates (admittedly in radians).\n\n\nNote: the Cartesian and Spherical notebooks can be obtained / installed from `stripy` itself as follows:\n\n```bash\n   python -c 'import stripy; stripy.documentation.install_documentation(path=\"Notebooks\")'   \n```\n\n### Cartesian\n\n  - [Ex1-Cartesian-Triangulations.ipynb](CartesianTriangulations/Ex1-Cartesian-Triangulations.ipynb)\n  - [Ex2-CartesianGrids.ipynb](CartesianTriangulations/Ex2-CartesianGrids.ipynb)\n  - [Ex3-Interpolation.ipynb](CartesianTriangulations/Ex3-Interpolation.ipynb)\n  - [Ex4-Gradients.ipynb](CartesianTriangulations/Ex4-Gradients.ipynb)\n  - [Ex5-Smoothing.ipynb](CartesianTriangulations/Ex5-Smoothing.ipynb)\n  - [Ex6-Scattered-Data.ipynb](CartesianTriangulations/Ex6-Scattered-Data.ipynb)\n  - [Ex7-Refinement-of-Triangulations.ipynb](CartesianTriangulations/Ex7-Refinement-of-Triangulations.ipynb)\n\n### Spherical\n\n  - [Ex1-Spherical-Triangulations.ipynb](SphericalTriangulations/Ex1-Spherical-Triangulations.ipynb)\n  - [Ex2-SphericalGrids.ipynb](SphericalTriangulations/Ex2-SphericalGrids.ipynb)\n  - [Ex3-Interpolation.ipynb](SphericalTriangulations/Ex3-Interpolation.ipynb)\n  - [Ex4-Gradients.ipynb](SphericalTriangulations/Ex4-Gradients.ipynb)\n  - [Ex5-Smoothing.ipynb](SphericalTriangulations/Ex5-Smoothing.ipynb)\n  - [Ex6-Scattered-Data.ipynb](SphericalTriangulations/Ex6-Scattered-Data.ipynb)\n  - [Ex7-Refinement-of-Triangulations.ipynb](SphericalTriangulations/Ex7-Refinement-of-Triangulations.ipynb)\n\n\n### Examples\n\nNote, these examples are the notebooks from `litho1pt0` which are installed from the\npackage itself:\n\n```bash\n   python -c 'import litho1pt0; litho1pt0.documentation.install_documentation(path=\"Notebooks\")'\n```\n\nThe first three notebooks are an introduction to `litho1pt0` that does not explicitly mention `stripy` but\nthe next two worked examples show how to search, interpolate and plot with the help of `stripy` routines.\n\n  - [Ex1-Litho1Layers.ipynb](litho1pt0/Ex1-Litho1Layers.ipynb)\n  - [Ex2-Litho1Properties.ipynb](litho1pt0/Ex2-Litho1Properties.ipynb)\n  - [Ex3-CrustalRegionalisation.ipynb](litho1pt0/Ex3-CrustalRegionalisation.ipynb)\n  - [WorkEx1-CratonAverageProperties.ipynb](litho1pt0/WorkEx1-CratonAverageProperties.ipynb)\n  - [WorkEx2-OceanDepthAge.ipynb](litho1pt0/WorkEx2-OceanDepthAge.ipynb)\n\n\n\n\n## Installation\n\nTo install ([numpy](http://numpy.org) and fortran compiler, preferably\n[gfortran](https://gcc.gnu.org/wiki/GFortran), required):\n\n```bash\npython setup.py build\n```\n   - If you change the fortran compiler, you may have to add the\nflags `config_fc --fcompiler=<compiler name>` when setup.py is run\n(see docs for [numpy.distutils](http://docs.scipy.org/doc/numpy-dev/f2py/distutils.html)).\n```bash\npython setup.py install\n```\n\nAlternatively install using pip:\n\n```bash\npip install [--user] stripy\n```\n\n## Usage\n\nTwo classes are included as part of the Stripy package:\n\n- sTriangulation (Spherical coordinates)\n- Triangulation (Cartesian coordinates)\n\nThese classes share similar methods and can be easily interchanged.\nIn addition, there are many helper functions provided for building\n\nA series of tests are located in the *tests* subdirectory.\n\n\n## Docker\n\nA more straightforward installation which does not depend on specific compilers relies on the [docker](http://www.docker.com) virtualisation system.\n\nTo install the docker image and test it is working:\n\n```bash\n   docker pull lmoresi/stripy:latest\n   docker run --rm lmoresi/stripy:latest help\n```\n\nTo install the helper scripts for bash:\n\n```bash\n   docker run --rm lmoresi/stripy:latest bash_utils > bash_utils.sh\n   source bash_utils.sh\n```\n\n( you may find it helpful to move/rename this file and source it from\n  your bash profile at login time )\n\nThe bash_utils.sh script installs the following functions which are\navailable through the bash command line:\n\n```bash\n  stripy-docker-help\n  stripy-docker-sh\n  stripy-docker-nb\n  stripy-docker-browse\n  stripy-docker-serve\n  stripy-docker-terminal\n```\n\nFor more information on these functions, run\n\n```bash\n  source bash_utils.sh\n  stripy-docker-help\n```\n\nTo use the docker version as you would, say, using ipython to type on the command line:\n\n```bash\n   source bash_utils.sh  # (only needs to be done once)\n   stripy-docker-terminal\n   ls\n   ipython\n```\n\nTo use the docker version to run a script\n\n```bash\n   source bash_utils.sh  # (only needs to be done once)\n   stripy-docker-sh my_python_script.py\n```\n\n\n\n## References\n\n   1. Laske, G., G. Masters, and Z. Ma (2013), Update on CRUST1. 0\u2014A 1-degree global model of Earth's crust, Geophys Research Abstracts, 15, EGU2013\u20132658.\n\n   1. Pasyanos, M. E., T. G. Masters, G. Laske, and Z. Ma (2014), LITHO1.0: An updated crust and lithospheric model of the Earth, Journal of Geophysical Research-Solid Earth, 119(3), 2153\u20132173, doi:10.1002/2013JB010626.\n\n   1. R. J. Renka, \"ALGORITHM 751: TRIPACK: A Constrained Two- Dimensional Delaunay Triangulation Package\" ACM Trans. Math. Software, Vol. 22, No. 1, 1996, pp. 1-8.\n\n   1. R. J. Renka, \"ALGORITHM 752: SRFPACK: Software for Scattered Data Fitting with a Constrained Surface under Tension\", ACM Trans. Math. Software, Vol. 22, No. 1, 1996, pp. 9-17.\n\n   1. R. J. Renka, \"ALGORITHM 772: STRIPACK: Delaunay Triangulation and Voronoi Diagram on the Surface of a Sphere\" ACM Trans. Math. Software, Vol. 23, No. 3, 1997, pp. 416-434.\n\n   1. R. J. 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