GRASS GIS 7.6.0 released

After almost 1 year of development the GRASS Development team has released the new stable release GRASS GIS 7.6.0. A big thanks to all developers for their work and dedication!

There is a lot to like, including further improvements to the user experience and new useful additional functionalities to modules. I, for example am curious to try out the new raster map type, the GRASS virtual raster (VRT). This is a virtual mosaic of a list of input raster maps.

But I would say, head over to the overview page where you can read more about the new features in the 7.6 release series: new features in GRASS GIS 7.6. Or update GRASS and check out yourself.

Advertisements

Update release GRASS GIS 7.4.4

For those who missed it, a new update release GRASS GIS 7.4.4 is available since the 4th of January. It mainly brings bugfixes, but it also includes an important new function, the module r.mapcalc.simple. This module is especially important for a better integration with QGIS. It therefore has already been dubbed the “QGIS friendship” release :).

For more information, see the detailed announcement on https://trac.osgeo.org/grass/wiki/Release/7.4.4-News. For an overview of the new features in the 7.4 release series see New Features in GRASS GIS 7.4.

 

Sample raster values at point location in QGIS – yet another way

A while back I wrote how one can sample raster values at point locations in QGIS using the Saga function ‘Add grid values to point’, which is available in the processing toolbox. Recently it was reported here that values uploaded from a floating raster layer are rounded up to an integer. I tried it myself in Saga, and it seems to work fine for me. But if you are running in problems with a function, it is good to remember that in QGIS you have have access to many libraries from multiple software tools. This means there are often more than one way to get things done.

And indeed, the processing toolbox offers another tool to sample raster values at point location; the GRASS GIS v.what.rast.points function. In this post I describe how to use this tool directly in GRASS, but you can use the tool in QGIS as well, as illustrated below. Continue reading “Sample raster values at point location in QGIS – yet another way”

GRASS GIS addon to create smoothed legend image

I just uploaded a small addon for GRASS GIS, r.out.legend, with which you can quickly create a smoothed legend image for floating point raster maps (continuous values as opposed to categories).

You just select the raster layer, the dimensions and resolution required and the name of the output image. Other options are to change the font and font size and the image type (PNG, BMP, PDF and SVG).

r_out_legend_4
Example of an output of the r.out.legend addon

Continue reading “GRASS GIS addon to create smoothed legend image”

Finding open data for the Netherlands

Open data is  becoming increasingly important and there are considerable advantages, such as accountability, cost and time savings for users, easier knowledge sharing and increased efficiency in public services.

The importance of open data is more and more recognized (see e.g., this blog article (in Dutch) and this and this report). However, to bank on such advantages, there is a need to increase awareness about open data and make it easy to find and use the open data.  Continue reading “Finding open data for the Netherlands”