Archives for posts with tag: airquality

Within the UncertWeb project the ifgi provides a SOS with parts of the AirBase dataset provided by the EEA. Release 0.1-15 contains a great demo on what you can do with that data: How to build up a spatial interpolation, in this case inverse distance weighting (IDW), on top of a GetObservation result. This comprises some data formatting and spatial projection.

Thanks go to Edzer Pebesma for contributing the interpolation examples using the packages gstat and spacetime and pointing out bugs in the package!

Some plots generated by the demo are:

  1. overview plot of the available offerings,
  2. a histogram of all downloaded NO2 values,
  3. a bubble plot of the data for Germany,
  4. the stations in Germany in an UTM projection,
  5. two IDW interpolations, one aggregated over time and one for a specific time stamp, and last but not least
  6. a time series plot for a whole year for one station including a polynomically fitted regression line.

Go ahead and run the analysis yourself:


library("sos4R")

demo("airquality")

After version 0.1-12 got lost in the development process, yesterday version 0.1-13 was released on CRAN and today the binary builds are available. The release contains quite a few bug fixes and also some useful new features like plotting, which is based on converting objects to Spatial objects from the package sp.

Furthermore demos were extended considerably, especially airquality and southesk, with plotting, data fusion and coercion examples. All this, naturally, is documented well in the vignette, too.

Allow me a little anecdote from programming this release: Read the rest of this entry »