Category Archives: GIS

Active Tectonics of the Andes (ATA) active fault database now on GitHub

In order to facilitate collaboration in development of the Active Tectonics of the Andes (ATA), a database of active faults in the (northern, for now) Andes, we have hosted it on GitHub.  The development version is here, although the ‘release’ versions will continue to be posted on the KU HawkDrive, as before.  We have received some comments about incompleteness of the 1.0 version in certain areas (such as around Quito, Ecuador), and we used that information to expand the database in those areas.  The database is now at the 1.1 version, as well.  All New and Improved!

I would also happily field other requests for improvements in the database both geological (such as about specific faults or regions) and technical (new file formats, etc.).  Please, don’t hold back!  This is a free, public, open-source project and the more minds we have working on it, the better the database will be.  And as this database improves, so does knowledge of structures responsible for seismic hazard to communities in South America.

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HimaTibetMap now on GitHub

edit 9 June 2013: HimaTibetMap repo on GitHub updated to new address

I maintain HimaTibetMap, an open-source database of active faults in the Indo-Asian collision zone.  While I was in phd school, we hosted the data on KU’s proprietary HawkDrive system, which performed adequately but wasn’t super accessible for other things than downloading.  Furthermore, it was not clear if I would still have access to the site now that I’ve graduated.

So I  have made a HimaTibetMap page on GitHub, the new standard in collaboration websites.  This is where the version I maintain will be.  After discussion with collaborators, I may move the Active Tectonics of the Andes database there as well.

Ideally, this move will make it easier for others to contribute to the database as well.  So if you have anything to contribute, don’t hold back!

Active Tectonics of the Andes (ATA-1.0): A new open-source active fault database, and interpretation

The 1 October 2012 issue of GSA Today (a science and news magazine by the Geological Society of America) features a new article from our research group, primarily written by my friend and colleague Gabriel Veloza.  There are two contributions in this paper: the first is an open-source active fault database called Active Tectonics of the Andes, or ATA-1.0, and the second is an overview of northern Andean tectonics and an interpretation of the overall fault kinematics as resulting from variably-oblique subduction.

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HimaTibetMap-1.1: An expanded and updated version of the Database of Active Faults from the Indo-Asian Collision Zone- for ArcGIS, GMT, and Google Earth

Edit 3 May 2013: HimaTibetMap is now on GitHub!

I am pleased to announce the updated version of HimaTibetMap-1.1. HimaTibetMap is a database of active faults from the Indo-Asian collision zone, spanning from Iran to Myanmar, and India to Siberia, and contains over 1000 structures.  The area covered is approximately the same size as the contiguous US.  It was originally compiled by Mike Taylor and An Yin based on their field observations, remote sensing analysis, and reviews of the literature, as described in Taylor and Yin (2009). It was since updated slightly by Mike and myself, and released to the public as outlined in our Eos article from May 2010.

Map showing the extent of HimaTibetMap-1.1 made in ArcMap with topography from SRTM.

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How to create topographic profiles in ArcGIS with x,y coordinates, and plot them with projected sample locations in Python

I have been getting a lot of zircon (U-Th)/He cooling data these past couple of weeks from my South Lunggar project, and placing that data in a proper structural context for interpretation.  This involves drawing cross-sections and projecting my sample locations onto those cross-sections, which requires a topographic profile (drawn with no vertical exaggeration) that has proper geographic or projected coordinates.  Though this is a task that most geologists (especially structure/tectonics types) will have to do at some point, there is not a lot of information out there for doing it with modern tools.
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