Category Archives: Uncategorized

Update of the r.forestfrag addon for GRASS GIS

Some time ago I came across this post from Sylla Consult about a script to calculate forest fragmentation index suggested by Riitters et al. (2000). Obviously, it can be used for any land cover type, so perhaps landscape fragmentation index … Continue reading →

Aside | Posted on February 16, 2013 by | Tagged , , , | 7 Comments

Find Latitude and Longitude Values in Google Maps

Getting the coordinates of a location on Google maps isn’t as straight forwards as one may expect. But, as usual, if you know how, it is easy enough. And, there are actually several ways.

Aside | Posted on December 27, 2012 by | Tagged , , , | 1 Comment

pack up your GRASS raster layer

Posted on September 14, 2012 by

What if you  want to get a number of raster maps from a mapset to bring with you? Or you want to back up a number of layers, but not the whole mapset? Of course you can export it as … Continue reading →

Posted in GIS, GRASS GIS, Uncategorized | Tagged , , , , | Leave a comment

New: Quantum map, a simplified QGIS version

Posted on August 18, 2012 by

An announcement on the QGIS mailing list about NIWA Quantum map made me curious. How is this going to differ from QGIS? As it turns out, NIWA Quantum map is basically QGIS with a simplified interface, i.e., it has some … Continue reading →

Posted in Data sources, QGIS, Uncategorized | Tagged , , , | Leave a comment

Creating alternative emails from your gmail

Posted on July 28, 2012 by

In Gmail there is no easy way to sort. The good folks at Google seem to have this idea that everything should be done by searching. Sure, I use the search function all the time. But really… No option to … Continue reading →

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Creating a map using the command line

Posted on April 25, 2011 by

Although I like to carry out GIS analyses using the command line interface (CLI), creating maps is something I still tend to do using the graphical interface (GUI). And most of the time that makes perfect sense to me, creating … Continue reading →

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

Using the GRASS command g.list in R

Posted on February 23, 2011 by

Running grass commands within R is easy using either the system function or the spgrass6 package. But sometimes the GRASS outputs are not easy to read into a data frame or vector. For example, what if you want a vector … Continue reading →

Posted in Data handling, GIS, GRASS GIS, R computing environment, Uncategorized | Tagged , , , , | 1 Comment

Beautiful Kenya

Posted on November 12, 2010 by

I have lived in Kenya for seven years and this advert of Safaricom, a Kenyan mobile company, made me realize how much I miss it. It shows some of the beautiful and spectacular landscapes Kenya is famous for. For those … Continue reading →

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Exporting layers in GIMP file to single pdf file

Posted on October 5, 2010 by

[Update: there is a nice working plugin that does the trick, see here] In GIMP exporting multiple layers to one pdf file is surprisingly difficult. I found two solution, both require additional software besides GIMP, but are fairly easy to … Continue reading →

Posted in Uncategorized | Tagged | 11 Comments

A map of Madidi National Park

Posted on February 2, 2010 by

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