Category Archives: GRASS GIS

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 to open the ‘add selected map … Continue reading

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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 … Continue reading

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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 appropriate function in any … Continue reading

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Stable GRASS GIS 6.4.3 released

GRASS GIS 6.4.3 released – Birthday release for 30 years of GRASS GIS on http://grass.osgeo.org

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GRASS GIS 6.4.3 RC4 released

Good news, check it out: http://grass.osgeo.org/news/25/15/GRASS-GIS-6-4-3RC4-released/

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Sharing geotiff raster files

One of my favourite raster formats to share is the geotiff, mostly because I always thought it is one of the most portable formats. But yesterday I got an email from a colleague that the geotiffs I shared looked strange … Continue reading

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Rounding of floating numbers in GRASS GIS r.mapcalc

The GRASS GIS development team keeps on introducing new features and enhancements to GRASS 7.0. One of the latest examples is the enhancement of the round() function in r.mapcalc. Previously this function would always returns an integer, regardless of its … Continue reading

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GRASS gis scripts to import data from Worldclim, CSFR and PISM

I just came across these GRASS GIS scripts by Julien Seguinot to import multiple files from the WorldClim current climate dataset, the  Climate Forecast System Reanalysis (CSFR) data and some other reanalysis data sets. Furthermore, there is a script (r.in.pism) … Continue reading

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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

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Presentation of map query result improved in GRASS 7.0

GRASS GIS (version 6.4, and up to recently 7.0 too) would present map query results in the command console. I have never really got used to it though. Often when I needed to query some points on the map, I … Continue reading

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