Category Archives: QGIS

Wilderness 3d: The Canary Islands wilderness

Wilderness on Lanzarote, Canary Islands, Spain.

Wilderness on Lanzarote, Canary Islands, Spain.

Like many other Europeans I have had my share of visits to the Canary Islands (three and counting). The climate is decent from February until November. Some even like it in December and January. Most of us go to the Canary Islands for sunbathing, for long walks, to swim, spend time with friends or just get away from it all.

Few, if any, go to the Canary Islands for the wilderness. In this article I will be looking at your options if you were interested in getting away from people in the Canary Islands. It is not easy, but it is possible. If you are looking for wilderness in the Canary Islands I would suggest going to Lanzarote. Parque National de Timanfaya is the easiest accessible wilderness area.

The above map is based on publicly available vector data from the OpenStreetMap-project covering the Canary Islands. 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 Spanish authorities. It will not be used by the authorities and the audience (GIS geeks) of this posting is anyway quite limited.

The criterias used to map the wilderness areas based on OpenStreetMap in the Canary Islands are as follows:

  • Roads: primary, secondary, tertiary, unclassified, motorway, trunk
  • Land use: industrial, reservoir, military, farmland, residential, orchard, commercial, quarry, farmland and salt_pond
  • Railways
  • Waterways: canal

Like it or not – the presented map is what you get.

Wilderness 2: A practical approach to wilderness analysis using FME

Psalter World Map ca 1265

Psalter World Map ca 1265

In a former posting I discussed how wilderness is not only about politics, religion, philosophy and legal instruments. Unless we force it into a practical context, the term “wilderness” remains an intangible size. Geographers have a long history for making representations of the intangible – be it disease (John Snow), social justice and injustice, demography and more. To my knowledge one of the first impressions of wilderness or “the wild” is what we can find in some older maps. “Hic sunt dracones” (here be dragons) is an expression which can be found on the “Hunt-Lenox Globe” (c. 1503–07). Other maps bear similar indications of uncharted or remote areas. We, the geographers, have moved on. Today we paint our dragons in more sophisticated ways.

The use of technology to “find” or delimit wilderness has a long history in Norway and other countries. I will continue this tradition and do an analysis which in many ways is similar to those done in Norway. The encroachment types will be slightly different. So will the technology used to do the analysis.

In this posting I will look at how FME can be used to establish a wilderness areas data set. The results will be presented in a separate posting.

Continue reading

Uganda QGIS and remote sensing workshop

qgisThis week I had the privilege of coordinating a workshop on QGIS and remote sensing in Kampala, Uganda. Our trainers were Thomas Ballatore and Shane Bradt. We were very pleased with their walkthroughs and presentations of crucial software and plugins. The training is part of the Norwegian Oil for Development Program.

The focus was of course QGIS. But to be hones BEAM Visat was a real eye-opener. Yes, I have been introduced to the software while working in an expert group on satellite imagery. We earlier this year concluded a report for the Norwegian Space Centre where BEAM Visat was mentioned as one of several crucial components for handling remote sensing data. But – the workshop provided an applied context which gave me a whole new perspective to both software and methods.

Continue reading