I have to say that i agree with Sean. I think this can be done manually just fine.
My response was to answer the question if it were to be done, what
might it look like, and to indeed answer specific questions presented to me. I was not proposing the function myself.
You are right about the grib background. This procedure is something that is used in reading a graphic
weather map. Nothing to do with gribs, other than we can use the gribs to test the formula. Again, it is a crucial skill to have, but easily done by hand without an app or
plugin.
I can change the title of the video and leave it as a demo of how to do this... or just make a new one.
As far as what happens to the idea, we might keep in mind that we can always do just what was done in the video, namely load the model grib on top of the map we want to read, analysis or
forecast, and that way see what the winds are supposed to be. The only time we really need this manual analysis is when we do not have model data, or we have a case where the isobars of the models do not agree with the maps. In such a case we would defer to the maps, and then need to figure the winds. The table in our book solves this very well without calculations.
Getting the wind feathers on the conventional side of the barbs in another issue, and i would recommend fixing that.... meaning put it on a list for when the
hood is open the next time. Probably not worth a lot of extra
work on its own.
Quote:
Originally Posted by BILLY_BUDD
Well apparently Sean doesn’t feel this idea has much utility, or if it does, he doesn’t feel it is appropriate for Weatherfax. It does overlap GRIB strategies, but is more data frugal. (I think the video errantly inferred an entire grib vector field might be generated in this manner, though I am fairly certain that was not the point)
Sean has done great work with Weatherfax to his credit.
As an aside, I’ve used it very successfully to overlay USACE hydrographic surveys (Fathometry) of ICW and many class 1 and lesser inlets to great advantage from a piloting Thank You. Sean
But, that begs the question. Where to from here? Drop it, or discus the merits of the method in a should OpenCPN or shouldn’t it and should we continue with the definition? I’ve some opinions but prefer to hear from others.
Doesn’t OpenCPN user community accomplish this by way of crowd endorsement? The idea could easily die on the vine there as well in that deliberative process.
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