Category Archives: Software release

Recode your raster file in GRASS GIS using a csv file

The two easiest ways to reclassify a raster layer in GRASS GIS are using the r.reclass or r.recode functions. Although both are easy enough to use, sometimes it would be nice if you could just provide the input layer and a simple table with re-class values to create new raster maps. A fairly trivial task, so ideal to make another attempt at creating a python script.

I create a small add-on (r.recode.attr) that let you reclass/recode a raster layer based on values in a csv (comma separated text) file. The csv file should include one column with the raster values and one or more columns with the reclassification values. For each of these columns a new map will be created.  See the manual page for more information. Continue reading

The all new and shiny QGIS 2.6 is out

QGIS Brighton (2.6) is out, with tons of new features and improvements. Check it out on

For an overview of the new features, check out this change log. You really should check it out. I just had a look and although I am using the trunk and beta versions for some time now, I still noticed quite a few new features I hadn’t discovered yet!

GRASS GIS 7.0.0 beta 3 is out, bringing further fixes and improvements

GRASS 7 sports very significant improvements and numerous new functions. For example, the improved graphical user interface makes it much easier to carry out complex GIS operations and handling of vector data has become much faster and more efficient with very large files. There is a large number of new analytical raster and vector modules and existing modules are now much faster (some even 1000 x faster). Beta 3 ships 390 fixes and improvements with respect to beta 2. For more details, go to

Version 0.61 of Zim is out

A new version (0.61) of the Zim desktop wiki, my favourite notebook / project organizer, was released today. Apart from a large number of under-the-hood improvements, it sports a number of very welcome new features.

  • A more flexible export, allowing to export pages recursively. I.e., apart from the whole notebook or a single page, you can now also export sub-nodes. This was very high on my wish-list, great!
  • And it is getting better with another point on my wish-list now implemented; the option to export multiple pages to a single output file.
  • Export templates now support many more instructions and expressions. I had a quick look at the help file, and it looks like this has become a very powerful tool, albeit with a steep learning curve. Let’s see how this can help to further improve my current export template for a adaptive website.
  • New plugin for editing sequence diagrams (sound interesting)
  • The “tags” plugin was changed to show full page paths in the per-tag view.
  • Floating ToC, see screenshot below.
  • Possibly my favourite new plugin, the Source view plugin, which allows inserting ‘code blocks’ in the page that will be shown as emdedded widgets with syntax highlighting, line numbers etc.

You can download the new version from the Zim wiki website.

The new floating ToC widget in action (Zim version 0.61)

The new floating ToC widget in action (Zim version 0.61)

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 7. So which version should you go for? Well, it depends. Is long-term support, backward-compatibility with the GRASS 6 line and stability important to you. Or do you use the QGIS GRASS GIS toolbox a lot (which is not yet compatible with GRASS 7)? Go for the new GRASS 6.4 series.

Are you always looking for the latest of the latests, or is speed or the ability to handle very large data sets important to you? Have a look at list of new and improved features in GRASS 7. It is still in beta, so in theory less stable. But I should add that I am using this version for some time now (on Linux) and in my experience it is very stable.

Of course, you can also install both, they should run happily next to each other.


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 willing to compile it themselves. So have I, and out of experience I can tell you, this is a great release, with tons of new features and improvements, including great speed improvements in handling vector layers, a whole new module for time series analysis, numerous interface improvements, etc.

Really, you should go over to the download page and give it a try! Good change you won’t look back after that.