gfa 1.3.3

Python tools for the geospatial analysis of a velocityfield, using Davis & Titus (2011) and Bevis & Brown (2014) papers.

# GNSS Field Analysis (GFA)

My name is Vicente Yañez and I’m a geologist interested in computer science. GFA is a compilation of python’s functions that I wrote for my internship in [Centro Sismológico Nacional](http://www.sismologia.cl/) (CSN), during my undergraduate thesis and that I am still developing it.

GFA have the functions to calculate vectors from a gnss time series data with the trajectory model of [Bevis & Brown, 2014](https://link.springer.com/article/10.1007/s00190-013-0685-5) and with this, obtain a velocity field that represent the cortical deformation. Also, for the calculation of the velocity field, GFA has the distance-weighed function from [Cardozo & Allmendinger](http://www.sciencedirect.com/science/article/pii/S0098300408002410).After, from the velocity field this program include the tools to calculate the velocity tensor, and from this, the vorticity and stretching tensors (from the equations of [Davis & Titus, 2011](http://www.joshuadavis.us/teaching/2013fcomps/davistitus2011.pdf)).

I am sorry if you read any misspells o grammatical error. English is my second lenguage and my skills in it is far from perfect.

## Collaborators Francisco García. Francisco is a geologist who is doing his doctoral thesis in Universidad de Concepción about the connection of sismicity and volcanic eruptions in the southern Andes. You can contact him to his email [e-mail]

Also you can contact me to my mail [e-mail]

# Install

All the dependences necessary for run GFA are installable via pip. Also, the use of virtualev is recommended.

` sudo pip3 install virtualenv (if you don't have it installed) mkdir your_project cd your_project virtualenv your_project . your_project/bin/activate sudo pip3 install gfa `

If everything is alright, you can continue in the [How to start page](https://github.com/VicenteYanez/GFA/wiki/How-to-start)