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Deprecation (definition 4):?ÿthe act or process of no longer supporting the use of a function, value, feature, etc., in software, but not removing the capability immediately, so as to allow for continued compatibility for a period of time.
That is indeed the case-the survey foot is not going away so long as you need to use or convert from legacy SPC values if your state used that foot.
Considering that the NGS doesn't technically have authority over the states, and the 2022 datums have been pushed back by several years, I don't think anyone can know whether they're ready or not. To be clear, I'm all for the switch, and all for the modernized NSRS.
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Here in WA we have already moved to the iFt by statute....except there was an Advisory Board memo that told everyone to use the USFt "until the NGS publishes a new Modernized NSRS".
Which is weird because we don't need the modernized NSRS to use meters or USFt or iFt, and never have, but that's the general implication. The memo is also, if not exactly "buried", certainly not front and center on the DNR/PLSO website, so that anyone who gets newly licensed in Washington might very well start using iFt because the statute says to.
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So now the NGS is deprecating the USFt but delaying the rollout of the NSRS (through no fault of their own as far as I can tell) while the State is saying to keep using the USFt even though we already changed our statutes. Situation normal, nothing to see here, move along folks...
@rover83 The States are free to do as they wish within thier borders but the feds have authority over anything related to interstate commerce. The NGS worked with NIST (the folks who set measurement and unit standards) to make the federal rule change. Although they buggered it up, it is done. The feds won't be supporting the USft after December 31.?ÿ
I disagree that we cannot 'know we are ready'. Many States amended laws relating to coordinates and units in preparation for the change. The model was designed to adopt changes by rule as the feds rolled them out. Idaho took this approach with a few fail-safe measures if the feds messed it up (worse). We are absolutely ready.
Oh, I'm sure some of us are ready. I'm aware of the history behind the change and the implications for federal/interstate vs. in-state work.
Sure, the states are technically "ready" from a statutory standpoint. I was speaking more generally, in the sense that not many surveyors seem to be following or tracking the switch and it's hard to get a read on whether the bulk of licensees really understand the implications.
We certainly haven't had more than one or two cursory internal discussions about the change, and we have several hundred geomatics staff with somewhere between 50 and 80 licensees across both iFt and USFt states. It's going to be a scramble for a while.
@rover83 'scramble' is a generous word...lol
Just how many people at NGS are going to be thrown out of work by this deprecation? Will the whole US Foot support team be released, or just reassigned? Perhaps the resources that are saved can be rolled into getting the geodetic triangulation network team some new subtense bars.?ÿ ?ÿ ?ÿ
Why is there even an International Foot? Who else still uses Imperial apart from the US?
The discrepancy came from industry using 25.4 cm/inch exactly, which converts to the international foot. It prevailed over the older US definition when reaching the International Yard and Pound Agreement of 1957.
Feet??ÿ Who uses feet??ÿ Report everything in fractional rods.
I suppose one could convert to International Rods.
Fortunately the only place it makes a practical difference is in SPC or similar projections.
Two locomotives are one mile apart travelling in opposite directions at the same speed on the same track. A fly is flying back and forth between the two locomotives. If the initial coordinates of one locomotive are (5000, 5000), the grid azimuth between the two is 45?ø, and the track follows a straight line on the grid, how far does the fly travel before being squished and what are the coordinates of the squish point? Express your answer in each of the following units:
A. in International Feet
B. in Survey Feet
C. in Egyptian Royal Cubits
It never happens.?ÿ Right?
Sort of like going half the distance from Point A to Point B.?ÿ The next step is to go half way from that point to Point B.?ÿ Then the next step keeps repeating, always getting closer, but never quite getting to Point B.
Or..........the locomotives are getting farther apart and that poor fly never gets squished.
BTW, the capital of Lithuania is L.
I love a good THRAC first thing in the day.
Two locomotives are one mile apart travelling in opposite directions at the same speed on the same track. A fly is flying back and forth between the two locomotives. If the initial coordinates of one locomotive are (5000, 5000), the grid azimuth between the two is 45?ø, and the track follows a straight line on the grid, how far does the fly travel before being squished and what are the coordinates of the squish point? Express your answer in each of the following units:
A. in International Feet
B. in Survey Feet
C. in Egyptian Royal Cubits
The fly will not be squished by the trains, if the "opposite directions" of travel are away from each other.
hmmmm so 5280 =x??2.....
t0.....tn
departure and latitude with diminishing vectors.
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I'll have to finish this later when I'm not supposed to be staking
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Hint: Assuming that the trains are travelling?ÿtowards each other, and will collide, squishing the fly, the fly will travel 1 mile.
I didn't see the speed of the fly given. If it is the speed of the train it flies a half mile. If it is super fast, it flies back and forth many times and goes many miles.