Mapping Forest resource assessment 2010 data – part II

I am creating a series of maps based on the Global forest resources assessment 2010 (FRA). A first example is the map below with the forest and woodland cover per country as percentage of the total land area. The pie charts show the proportion of the forest-woodland area covered by forest and the portion covered by woodland per country. There are obviously other, and possible better, ways to present this information, but I wanted to try out and demonstrate the use of chart overlay in QGIS. Continue reading

Mapping Forest resource assessment 2010 data – part I

About a year ago I wrote a post about how to make a map showing deforestation rates in Africa based on the Global Forest Assessment 2005 by the Food and Agriculture Organization of the United Nation (FAO). The main purpose was to show how this could be done in R. It has since become the most viewed post on my blog, mostly by people looking for maps on deforestation or forest cover in Africa.

Autumn last year the new Global forest resources assessment 2010 (FRA) has been published by the FAO. Time for an update Continue reading

A map of deforestation in Africa using R

Deforestation rates in Africa are in general high, but differences between countries are large. I want to illustrate these differences in a series of deforestation maps (change in forest and woodlands cover, including and excluding forest plantations, etc.). Normally I would use GRASS GIS or QGIS for such a task, but this should be easy to do in R too. Below I give a step-by-step description of my first attempt to make a Choropleth map in R (with the deforestation rates for 1990-2000 and 2000-2005). Continue reading