For those of you who are not familiar with the term GIS, it stands for Geographic Information Systems, a computer-based system designed to capture, manipulate, and present geographic data in visual form. It is now the most common basis for creating modern maps. It is probably familiar to most Americans through the use of GPS (Global Positioning System) navigation systems available in cars, trucks, boats/ships, and increasingly in smart phones. GIS and GPS are not the same thing, but both use satellite positioning to locate coordinates on Earth’s surface (click on the red links for more information on each system).
Screen shot of a GIS software program – in this case, QGIS.
If you have been following this blog, you know that I am learning how to construct digital maps in order to reconstruct a visual representation of Albuquerque’s historic Red Light District, which disappeared sometime in the first half of the 20th Century. That means that I have to learn to use a GIS program, and probably learn a bit of programming.
Recently I started to learn how to use QGIS, a powerful and flexible GIS program. QGIS is an open source alternative to proprietary GIS software systems like ArcGIS by ESRI. QGIS can be used on a PC, Mac, or Linux platforms (unlike ArcGIS, which can only be used with Microsoft Windows). In addition, since QGIS is open source, there are no licensing fees – an important consideration for my mapping project, since the funding for the project will be scarce at best. One other thing: by using QGIS instead of other proprietary GIS programs, my mapping project will be supporting the free-flow of ideas and an intellectual commons that is open not just to users, but also to anyone capable of making a useful contribution to GIS technologies – even without having to jump through academic hoops and hoopla.
Here is a screen shot of my first QGIS map – New Mexico!!
To begin my studies, I followed a tutorial available on the blog, Geospatial Historian, which is maintained by a group of scholars located in Canada. Conceptually, QGIS was a little difficult to wrap my head around (I’m still struggling a bit), and like all software GIS technologies have their own unique terminology. Luckily, I was invited by my colleague Elena Friot to attend a GIS workshop given by Dr. Karl Benedict, assistant professor in the Earth Data Analysis Center at the University of New Mexico. Dr. Benedict gave a very clear introduction to the basics of GIS. This made my own efforts with QGIS much more productive. I am looking forward to learning more.
Our GIS workshop at the Earth Data Analysis Center, University of New Mexico