A new spatial interpolation algorithm has been implemented: "NONE". This just fills the grid with nodata. Otherwise, an unnecessary check has been removed in Meteo2DInterpolator and some comments editing, white spaces...

Removing an external include out of the PSQLIO header (just in case), updating/fixing some plugin documentation (PSQLIO and GSNIO).

Reverting a change that made reading SMET files impossible with OpenMP. Pushing up version number to 2.4.2. Properly restoring ostream parameters before returning (in libinterpol1D, thanks to Coverity).

IOManager: added the option to clear the point cache through the clear_cache() procedure. Furthermore the point cache is cleared in case push_meteo_data is successful, i.e. when data (filtered or raw) is pushed into the IOManager. 

The equator was not at the right location for UTM coordinates, therefore zones xxN were supposed to be in the southern hemipshere...  This fixes issue 351

Adding a check on the arguments of "Accumulate". The tests' ini file had a typo, which was messing up the meteo_reading tests (using HNW::resample=linear instead of the accumulate), this has been fixed and the reference values have been updated (and manually checked).

The two arguments accumulate resampling algorithm has been removed. The distribute filter should be used instead. The missing files are now committed.

A new processing element has been added: HNW_DISTRIBUTE. This distributes accumulated precipitation over a number of preceeding time steps. This is useful, for example, when one has an hourly file that contains 24 hours sums of precipitation, written as nodata for all time steps and the accumulation on the last time step of the 24 hours period. Since this is implemented as a filter, it is then possible to also add an undercatch correction (and don't forget to re-accumulate anyway in the resampling methods!).

GeotopIO: Geotop deals with air pressure in mbar, thus the convertUnits and convertUnitsBack functions needed to be adapted.

A little more cleanup (constification, mostly) in GSNIO as well as documentation. Updated the example io.ini. And a new data generator: Brutsaert for clear sky ILWR.

Small cleanup in GSNIO, changing URL/USER/PASS to GSN_URL/GSN_USER/GSN_PASS. Updated the documentation version; fixed a documentation bug.

Using the new Coords constructor and making the list of STATIONS in GRIBIO support discontinuous numbering

A new concept has been introduced: virtual stations. These are points where the meteo data will be transparently spatially interpolated and returned to getMeteoData calls. This allows a point model like Snowpack to work on virtual stations without any internal changes. A few new keys have been introduced in order to provide the necessary information: virtual stations location, meteo parameters to interpolate. For example:
VIRTUAL_STATIONS = true
VIRTUAL_PARAMETERS = TA RH HNW HS VW RSWR ILWR
VSTATION1 = 46.8 9.833333
VSTATION2 = 46.7 9.9

A few drawbacks still exist: the time range getMeteoData call is not supported yet. A DEM must be provided (ie DEM key in ini file). Obviously, all interpolated parameters must have been associated with interpolation algorithms. The virtual stations have IDs such as VIR1, VIR2, etc For performance reasons, the interpolation is then performed on a one cell dem, which means that algorithms using dem characteristics would (currently) be messed up. Basically, this is still a work in progress before everything is robust!

Otherwise, some POPC ifdef have been removed and the "iomanager.interpolate(... Grid2DObject)" call has been removed since the "iomanager.getMeteoData(... Grid2DObject)" call should be used instead (for consistency).

Removing an unnecessary vector copying in BufferedIOHandler. A new private method has been added that IOManager can call.

In order to be able to read arc grids produced by R, the headers are now read in a case insensitive manner

speeding up IOUtils convertString<double>: Adding an explicit implementation for the conversion of strings to doubles, based on strtod from the cstdlib. This function cuts the runtime of this function to about a third.

libsmet: a new convert_to_double implementation, based on strtod from the cstdlib, cuts conversion time to about a fourth of the stringstream implementation.

GSNIO: Missing NULL values and missing fields and units keys in the header have been fixed on the GSN server side. Plugin updated accordingly.