----------- [modified] answer to beteljuice -----
Yeah, well, that's the problem of talking about idea's too fast. So no, it is not that 630 is infinity and up when a catastrophic class is added. It is the difference between a 5 point scale (which I currently have topped off at 700) and a 6 point scale (which will set a limit to red and from there goes on to infinity and beyond).beteljuice wrote:Sun 29 Sep 2019 1:26 amSo .... Keeping Max 'key' scale @ 700 (No point of infinity plus one !)you wrote: The definition of the zones of pwsFWI (at this moment, it may change as result of testing):
630 - : red
Note: I am thinking about a purple zone above red, 'Catastrophic' ....
... Everything higher than 630 should be regarded as extreme danger
Hope you get the difference and my point.
So in future, the graphic scale will be the same size in the output, but adding a limit to red and topping of by a figure of which I have not thought about yet. Fire Warning levels are no hard science, they are interpretation and agreement on the basis of the calculation.
But I probably will give a choice - parameter in ini - between a 5 point scale and a 6 point scale. Apparently fire warning in the Pays Basque and the Pays-Bas is different from the semi-arid zones who need an added, catastrophic, scale.
----------- end [modified] answer to beteljuice -----
So why keep a five point scale then? Simply because that is international, well not standardised, but highly accepted (e.g. look at the old FWIcalc program) and it all descends from the Canadian FWI. It is only since 2017 that Australia uses the Catastrophic class if I am well informed. And a country which has both climatic zones probably does not wish to use two different warning systems (e.g. Spain).
Whoever wishes to know more about the Australian warning system should read about the MacArthur FWI, a semi-arid variation of the Canadian FWI (for moderate zones) with different scaling (and probably tuning of the equations).
And btw, so far I am happy about the performance of pwsFWI in both zones. Let's see how it gets through the Australian summer. I will prepare the catastrophic level ASAP after version 1.0.0 (soon).
Hope this clarifies.