[GIS] run tools from QGIS using shell commands

qgisshell

Is it possible to script rutines in QGIS (python) and then runing them remotely? To illustrate, can I through a shell (ssh or telnet) ask to QGIS to transform a shapefile into a gjson format? Mostly, I'm thinking in the interaction of QGIS with another software like R for example, where I can generate command lines. (I'm not talking about QGIS internal command shell)

Best Answer

Most of the tools inside the qgis GUI are actually calls to gdal executables or python scripts, so the answer is yes.

You would ssh into your shell, and type for example: /path/to/gdal/gdal_translate parameters

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[GIS] How to run OSgo4W shell script on Windows

It turns out that I forgot to type sh before the shell script in the osgeo4w. I also had an extra pair of quotes after hillshade in script. Once I removed the quotes and typed "sh hillshade.sh" into the osgeo4w shell everything worked like a charm. See below for the updated and correct script.

for f in *.tif
do
  echo "Processing $f"
gdaldem hillshade $f $f-hillshade -z 1.0 -s 1.0 -az 315.0 -alt 45.0 -compute_edges -of GTiff
done

[GIS] Convert .asc format into shapefile

You can try the GDAL utility gdal_polygonize.py. For example, to create a shapefile output.shp from input.asc:

gdal_polygonize.py -f "ESRI Shapefile" input.asc output.shp

Prerequisites: GDAL, Python and GDAL Python bindings.

But... Are you sure that SHP is the right format in order to work with such huge data?

Best Answer

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[GIS] How to run OSgo4W shell script on Windows

[GIS] Convert .asc format into shapefile

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