Modified generalWrangleRadar.R

[LaMargna]

Commented out some code I blieve not yet needed
Made projection strings global (for now)
Closed open netcdf files when no more needed
added a function “makeCellfunction” that as a function of a netcdf file creates a function mapping the Dutch grid (global SOURCE string) to the polar stereographic coordinate in the TARGET string (not yet obtained from the netcdf)

[LaMargna]

Commented out

library(sp)  
library(raster)

and

coordinates(pointDF)<-~pointX+pointY  
crs(pointDF)<-RDH

I don't think these are needed now (but might be later, so keep the comments). I try to use as minimal code as possible

I changed the references RDH and polar to SOURCE and TARGET, the idea being that we might end up with a more general code. I also defined SOURCE and TARGET globally for now.

I added two more global variables to aide development

exampleNetCDFfile <- "./KNMIdata/PrecipitationRadar/KNMI-Data/RAD_NL25_RAC_MFBS_5min_201501312355.nc"  
filepath <- exampleNetCDFfile

(maybe put the exampleNetCDFfile file itself somewhere else in the tree. I suggest to keep the original name. Odd path anyway now I see it written down: KNMIdata/.../KNMI-Data/....). Can you plaese add a KNMI netCDF file there?

I modified findCells and named that function makeCellfunction. findCells will serve its purpose when we are going to access the NetCDF files directly, for now I think for performance reasons I will focus on precipitation data using a key-value table (time, i, j, value) only.

makeCellfunction returns a function.

Btw: I think we made an error with the y-index (is still in findCells). I think, please check this, that the top row of the matrix is associated with the highest y-values. This is different from the x-values. In fact it may actually be the first column. I think we need to determine which dimension is which in the "variableOfInterest" (whether "y" is the first dimension in the variableOfInterest) from the NetCDF meta data some time.

I left getMetaDataNetCDF intact.

At some places I closed open NetCDF files when (I think) they are no more needed.

[LaMargna]

One error already, the path "KNMIdata/.../KNMI-Data/...." has already changed