Extend package to request precipitation as raster map waterinfo.be

[stijnvanhoey]

According to more recent documentation , precipitation radar images can be requested as well using the waterinfo.be API using a number of new calls:

• GetRasterTimeseriesValue (analogue to existing getTimeseriesvalues API call), returning HDF5 Opera files and metadata using the html format

e.g. https://hydro.vmm.be/grid/kiwis/KiWIS?datasource=10&service=kisters&type=queryServices&request=getrastertimeseriesvalues&ts_path=COMP_VMM/Vlaanderen_VMM/N/5m.Cmd.Raster.O.PAC_1h_1km_cappi_adj&period=PT1H&from=2018-10-09T15:00:00.000+01:00&format=hdf5

• GetRasterFile to get a single geotiff or AsciiGrid file
• GetRasterToPointValues request a timeseries for a single point of the raster image using raster_x and raster_y as query parameters

Note that the related reliability can also be requested using the existing GetTimeseriesValues request. Datasource for these raster datasets is 10.