My favorite image standard! Dynamic quality loading could've been so useful, but computers didn't have the memory to run it when it first came out, and the benefits of dynamic quality proved difficult to realize with the way browsers downloads images... alas, what could've been. Now we're moving on to JPEG XL, I guess.
So close to home. Some people in the digital archives space thought this was inevitable and were then surprised when nobody rushed to use a computationally expensive with a fee-walled spec, no test suite, no good open source implementation, and thus poor interoperability. Things have improved a lot since OpenJPEG emerged and became the reference implementation but I don’t know that tiling is worth enough to take on the cost and security risk.
Pedantic answers to the Mathematician's questions on what precipitation chance means: https://www.weather.gov/ffc/pop If you know the meaning of the probability, you can answer the rest of his questions. The area one is basically a non-question: any forecast on weather.gov will show you the forecast area.
And for the question unasked: how do you end up with phrases like "scattered" or "this morning" in a forecast? NOAA again has you covered: https://www.weather.gov/bgm/forecast_terms
NOAA actually has a succinct explanation for part of this: https://www.weather.gov/ffc/popThe short of it is this: there is a X percent chance that rain will occur at any given point in the area over the next hour, independent of the other hourly predictions. This extrapolates to the daily forecast as well, which does have hourly bounds (though I forget what they are).
For a while the local meteorologist changed it from 30% chance of rain to 30% *coverage* of rain, meaning for the viewing area 30% of it was getting rain. I assume that's still what they use even though they switched back to "chance."
Or, at least, 30% of you would. But yeah, the way the husband of a meteorologist I used to work with explained it, "30% chance of rain" means, roughly, "It's going to rain somewhere. It's a 30% chance it'll be on YOU" (Though that is just how he put it. Technically, "30% chance" could mean "It's definitely going to rain, and 30% of the area will get it" or equally "It's only 1-in-3 that it will rain, but if it does, it will rain EVERYWHERE" But these two possibilities come out to the same thing assuming you are a stationary object within the area which is small enough that you can not meaningfully be "half-rained on"
Hi, I'm your new meteorologist and a former software developer. Hey, when we say 12pm, does that mean the hour from 12pm to 1pm, or the hour centered on 12pm? Or is it a snapshot at 12:00 exactly? Because our 24-hour forecast has midnight at both ends, and I'm worried we have an off-by-one error.
Hi, I'm your new meteorologist and a former software developer. Hey, when we say 12pm, does that mean the hour from 12pm to 1pm, or the hour centered on 12pm? Or is it a snapshot at 12:00 exactly? Because our 24-hour forecast has midnight at both ends, and I'm worried we have an off-by-one error.