Course Description:
The course aims to give participants an extensive hands-on experience with the use of GIS operations and to apply georeferenced data. A number of exercises will be given to allow students to become familiar with the essential GIS functionalities. Many of these exercises will provide students a model on how to populate a data table (that can later be used for a statistical analysis) with geographic or disaggregated variables. Lectures will be balanced between the theoretical and the practical with several examples. Examples are mostly drawn from the use of GIS for the study of civil armed conflict, but as the techniques are generic, course participants should be able to see their relevance for other purposes.
The course further aims to give participants and understanding on what GIS is as well as to provide participants with the necessary understanding of basic GIS concepts and tools, such as:
- GIS as Geographical Information System, Science and Studies.
- The nature of geographical data, the measurement levels after Stevens (nominal, ordinal, interval and ration) and some of their shortcomings when applied to geographical data. Spatial autocorrelation and how this may be problematic for conventional statistics.
- Representation of geographical data in GIS, discrete and continuous geographic data as well as their associated common representation: vector and raster data. Topological properties for vector data and how these facilitate spatial analysis.
- Representing statistical surfaces and terrain surfaces
- Coordinate systems; both coordinate system at the globe (geographical co-ordinates or latitude
/ longitude) and Cartesian (‘flat’) coordinate system
- Map projections and their properties, how measurements on a global scale becomes distorted because of map projections.
- Data capture methods (Global Positioning Systems (GPS), Remote Sensing, Screen and table digitizing, scanning, from table to map. Georeferencing a satellite image, aerial photograph or a scanned map)
- Queries based on attributes, queries based on location
- Area and distance measurement. How to measure distance and area correctly on a global scale? Eulidean distance versus geodesic distances.
- Basic vector based GIS tools: buffer and overlay
- Basic raster based tools: map algebra. Local, focal, zonal, and global map algebra functions. - Spatial modelling
- Presenting geographical data, thematic mapping (choropleth maps), map design - Geovisualization and participatory GIS
The course participants will be working with geographic representations of armed conflicts as well as phenomena often related to conflict. Dataset on armed conflicts could include geocoded conflict data from Uppsala/PRIO (point), localized Military Interstate Disputes (MID) data, conflict zones (polygon), Armed Conflict Location and Event Data - ACLED (points). Examples of other relevant georeferenced datasets that will be mentioned in lectures and may be used in exercises during the course include diamond sites, petroleum fields, ethnic groups, forests, and mountainous terrain and population density.
Lecture and lab constitute five days of teaching where tentatively more than half of these teaching hours will be lab hours. Examples of exercises would be:
- Understanding map projections
- From table to map – convert a table with coordinates with the ‘add events’ tool. Examples of tables with geographical coordinates that we can use are dataset on armed conflicts (the Uppsala/PRIO dataset), dataset on locations of military intrastate disputes (MIDLOC), and Armed Conflict Location and Event Data – ACLED.
- Representing the extension of internal armed conflicts by applying buffer and overlay operations.
- Combining dataset on the extension of internal armed conflicts with a population raster in order to estimate the number of people living in conflict affected areas with the use of zonal map algebra function (zonal statistics).
- Distance measures – how to get the measurement correct on a global scale by using geodesic distance measures
- Thematic mapping – how to make appealing and understandable maps
- Use of scripting to automate work-flows and to manage large dataset (for instance by batch processing)
As GIS also is a technology and since there are many different formats involved, some focus on the more technical side of GIS will also be covered. When working with other software for statistical analysis or word processing, course participants may be used to be working with one single file (or a limited number of files). Working with GIS, for one GIS project, it is not uncommon that the number of files becomes several hundred or more. For native users, this is often challenging, and the course therefore also aims to make course participants able to manage huge amount of GIS data.
Software
The software used will be ArcGIS Desktop (version 10.4) with the Spatial Analyst extension. Possibly also QGIS. Students should have ArcGIS and QGIS installed already at course start. A free trial version of the ArcGIS software is available from here:
http://www.esri.com/software/arcgis/arcgis-for-desktop/free-trial
NB! You need ArcMap – not ArcGIS Pro!