Area with wilderness and encroachment. Visualization of change of wilderness status.
Wilderness degradation happens when new encroachments are made changing the wilderness status of an area. It is a complex issue which does not easily lend it self to a GIS based analysis. I will refer to my posting on wilderness for a peek into the complex world of wilderness philosophy.
It is possible to set up a system like FME to do an analysis of changes in wilderness due to new encroachments. The procedure I made generates a wilderness degradation data set based on wilderness and (new) encroachment data. It is based on procedures used by the Norwegian government in their analysis of wilderness and encroachment. The system should however be easy to accommodate for different preconditions by manipulating the number of wilderness zones and/or their buffer distances.
To visualize the degradation of wilderness it is necessary to make a categorization and furthermore establish a cartography to carry the information to the reader. In my view this can not be done unless the author/mapmaker to some extent takes side in what is good or not good related to wilderness degradation. This will be the focus on a forthcoming posting, but I will touch into the issues here as well.
FME is but one of the potential solutions for producing the results. QGIS, GeoKettle and even PostGIS could be good alternatives. The GitHub project has room for alternative implementations.
A philosophical approach towards wilderness analysis has been written. A FME-script has been designed and appropriately discussed. Now time has come to run the script on national level data to prove the concept and also open up for a discussion on challenges with the method and its results.
I have done this for several countries and will deliver the results and discuss them appropriately.
All examples are delivered as-is. There is no governmental context to the analysis. The data used for the analysis is OpenStreetMap data.
At the time of writing this article the number of examples has yet to be decided. The following are available as of writing this posting:
I visited Bulgaria in December 2014. Based on discussions with BBF while contributing to their GIS training I decided to do a national wilderness analysis for Bulgaria. The Bulgaria analysis was done using OpenStreetMap data.
The above map is based on publicly available vector data from the OpenStreetMap-project covering Bulgaria. A wilderness analysis based on insufficient data will only represent a map of more or less mapped areas. In this case the basis for the analysis is decent. There will still be many errors.
The analysis has not in any way been sanctioned by Bulgarian authorities. But then again, why should it be? A map like this could be made by anyone having access to encroachment data and the tools to do the analysis.
The criteria used to map the wilderness areas based on OpenStreetMap in Bulgaria is as follows:
Land use: industrial, reservoir, military, farmland, residential, orchard, commercial, quarry, farmland and salt_pond
The choice of data representing encroachments is highly subjective. A Bulgarian might have a completely different view of what qualifies as encroachment. And based on this one might establish a constructive dialogue on land use issues.
The map in this posting is the results of a calculation of wilderness based on methods discussed earlier in this series using OpenStreetMap data for Guinea.
One of the reasons why I choose Guinea for a wilderness analysis is that I do not know the country. I have not worked with anyone in the conservation scene in Guinea. I barely know the geography of the country. Guinea did however seem to have a decent OSM coverage. It has also had a lot of focus lately due to the ebola virus. Continue reading →
Any analysis of wilderness areas will be based on an understanding of environmental, philosophical, religious, human and political factors. In Norway this understanding has over the years led to a categorization of wilderness into different area classes based on distance to defined encroachments. Roads, railways, towers, and more represent encroachments in the context of wilderness.
Through a couple of blog posts I will look more broadly at terrestrial wilderness analysis using different GIS tools. The tools this time will be FME desktop, QGIS and Geonode. I will present methods for generating a wilderness layer and visualization. I will also present tools for analyzing changes in wilderness status based on new encroachments. The work will be done in collaboration with Tanzania Conservation Resource Centre which allowed me to use their FME license for this work.
Recreational road/track in Serengeti, June 2006. (photo: Ragnvald Larsen)
The term wilderness deserves more than a flat technical consideration. In my view our definition of wilderness also defines us as humans – for better and worse. In this posting, the first in this series, I will focus on the more philosophical side of the term wilderness. I did however choose to be a geographer and not a philosopher, so bear with me… Had I chosen to be a philosopher it would probably have been a lousy one – I hope I am a better geographer.