Clik here to view.
Creating a QGIS color map from text file
I recently found the interesting USGS map of global ecosystems. The data can be viewed online but can also be downloaded as geotif files, which is great as about every GIS program on the planet can...
View ArticleClik here to view.
QGIS auto-trace plugin
Last time I opened QGIS there was a notification that there was a new plugin; the auto-trace plugin. I just tried it out to see what it is all about. I must say, it is a pretty nifty tool. It let’s you...
View ArticleClik here to view.
Installing Google Earth on Ubuntu 13.10 64-bit
Google earth cannot be installed on Ubuntu 64-bit systems anymore. It requires the ia32-libs which is unfortunately deprecated in Ubuntu 13.10. Luckily I found a solution by mc4man on the Ubuntu...
View ArticleClik here to view.
A new great version of QGIS
Are you one of those people eagerly waiting for all those new features in QGIS that have been mentioned in the last couple of months on various forums and blogs? Well, the waiting is (almost) over....
View ArticleClik here to view.
Rescale your raster data layer
Sometimes you want to rescale a raster layer, e.g., to reduce the number of categories, or to create a common scale for different raster layers. Very basic of course, so you can expect to find an...
View ArticleClik here to view.
Reverb makes it easy to find and download satellite data
If you need MODIS satellite data, you should check Nasa’s Reverb web portal. It is a, and I quote, “next generation metadata and service discovery tool”. But, as it turns out, is is already available...
View ArticleClik here to view.
A quick list for one-click access to a list of often used xsetwacom settings
I just bought a small Wacom drawing tablet to use as alternative mouse and for my photo editing. According to the manual this tablets, like most on the market, are only compatible with Windows or OS X....
View ArticleClik here to view.
GRASS 7.0 beta1 is out
After a long wait, GRASS 7.0 beta is out! See here a summary of what is new in this release. Take your time, is is a long list :-). In fact, GRASS 7.0 has been available for some time now for those...
View ArticleClik here to view.
Add multiple raster or vector map layers to current map display in GRASS GIS
If your mapset contains many raster or vector layers GRASS offers a very handy feature to quickly select the layers you want to add to your current map display. In the layer manager, click Ctrl+Shift+L...
View ArticleClik here to view.
A new method and tool (ExDet) to evaluate novelty environmental conditions
A common objective of correlative species distribution model is to be able to project the potential distribution of the target species into a new environmental space. This can be a new geographic space...
View ArticleClik here to view.
Saving layer styles to your Spatialite database
Just discovered this option in QGIS to save styles for Spatialite layers to the Spatialite database. I don’t know when this option was introduced (I am running the development version at the moment),...
View ArticleClik here to view.
One of those handy GRASS GIS functions I didn’t know about
Recently I needed to create a series of temporally interpolated rasters in between two input raster maps, viz., a suitability distribution map under climate conditions in 2000 and under projected...
View ArticleClik here to view.
Creating a raster layer with a weighted random sample of points (or, my first...
I needed to create a raster map layer with a weighted random sample of all raster cells, using the percentage of crop land as weight. I couldn’t find a function to create such a weighted sample, so I...
View ArticleClik here to view.
A Zim-wiki export template for a adaptive website
I wrote before about Zim, a graphical text editor used to maintain a collection of wiki pages. Although mostly aimed at individual use, notebooks can also be shared as html files (and a few other...
View ArticleClik here to view.
A new search engine to search the R documentation
Just to quickly share this great new website where you can search the documentation of all R packages and functions available on CRAN (6688 R packages and 136342 R functions at the moment of writing!)....
View ArticleClik here to view.
Installing Google Earth on Ubuntu 14.04
Since Ubuntu 13.10 Google earth cannot be installed out of the box on Ubuntu 64-bit systems because it requires the deprecated ia32-libs package. The previous solution I wrote about, for Ubuntu 13.10,...
View ArticleClik here to view.
Using GDAL from within QGIS: trouble shooting
Some notes to self about steps I had to take to make GDAL work from within QGIS. Both where compiled from source and run without problems. However, there are still a few issues with running gdal from...
View ArticleClik here to view.
Stable GRASS GIS 6.4.4 released
A new stable version GRASS GIS 6.4.4 has been released. It sports various bug fixes and a number of new features. Go here for more information. You may be aware that there is also a GRASS GIS version...
View ArticleClik here to view.
QGIS 2.4 is out
Just a few days after the release of GRASS GIS 6.4.4, now the latest and greatest QGIS Chugiak. And this new version comes with a whole bunch of improvements and new features. Check out this nice...
View ArticleClik here to view.
Sampling raster values at point locations in QGIS – an update
In a by now fairly old post I described how to sample raster values at point location in QGIS. The method I described used the ‘Point Sampling Tool’ addon. However, the function creates a new point...
View Article