Monthly Archives: February 2010

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 … Continue reading

Posted in forest, GIS, R computing environment | Tagged , , , , | 11 Comments

Making beautiful maps…

Well, in my (admittedly limited) experience, that is actually one of the weaker points of many open source GIS programs. Take for example GRASS or SAGA GIS. Both are very powerful analytical tools, but at the same time options to … Continue reading

Posted in GIS, GIS software, QGIS | Tagged , | 1 Comment

Sampling raster values at point locations in QGIS

Recently I received an excel file with the coordinates of 144 vegetation sample plots, with the request to get the altitude values for the plots. For those with little experience in GIS, this is easy enough in most GIS programs. … Continue reading

Posted in Data handling, GIS, GIS software, QGIS | Tagged , , , , , , | 20 Comments

New CGIAR Ongoing Research Map

To create more synergy between projects and research efforts of one or more organizations, it is essential to have a good overview of ongoing projects, including where those projects are being implemented. A good example is the The CGIAR (the … Continue reading

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Importing WorldClim climate .bil datalayers in GRASS GIS

In a previous post I wrote how you can generate bioclimatic data layers based on monthly rainfall and temperature data in GRASS GIS. Monthly climate data for future conditions can be downloaded from WorldClim in generic grid (raster) format only. … Continue reading

Posted in Data handling, GIS software, GRASS GIS, R computing environment | Tagged , , | 12 Comments

A map of Madidi National Park

See The grunts of the jaguar on Forestalis for a nice story by Jeroen van der Horst about his trip in Madidi National Park in Bolivia. I had no clue where to find this park so decided to look it … Continue reading

Posted in GIS, GIS software, Uncategorized | Tagged , , , , , | 1 Comment