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ET-NCMP / NCMP

Software in R for calculating National Climate Monitoring Products
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Evaluate performace for small nations #66

Open ET-NCMP opened 6 years ago

ET-NCMP commented 6 years ago

Within the ET-NCMP there was little scope for investigating the behaviour of the code on small nations. Small can be defined in various ways: nations which cover a small area, nations with very few stations, nations with a single station. Specific feedback on these cases would be valuable.

ET-NCMP commented 6 years ago

We have a use case where a user tried to run the software with 2 stations. It failed at the variogram calculation stage because it can't fit a variogram to only two points.

It would be advantageous to add an exception to the variogram code so that in the case where there are fewer than ~10 stations, a default variogram is used with the nugget set to zero, the sill set to the variance of the index and the range set to 500 km (or some more sensible values).