Does it really matter if my house burns because of pole drift or because of climate change? I don't like it burning either way. So if there is something I can do against my house burning, (and I know there are things I can do against that) I will definitely try that. And I believe we agree that we could do things, right?
Can there even be geodetic drift of the poles? I sort of assumed that our lat/lon system is based on the poles being fixed points as a matter of definition.
Each ellipsoid is rigidly defined (well, some historic ones are sloppy), so WGS84 won't drift .. (that's a bold statement, is it true down to the micron and if so what are the absolute* datums to reference against?).
That said, there are literally hundreds of historic pre WGS84 ellipsoid|datum pairings, each with a somewhat different "survey map pole".
Historically geodectic poles have shifted as a function of datums.
The main point here, such as it is, was to poke at the infomation free aspect of "polar drift" as a comment .. which pole and what does that have to do with climate change? etc.
Does it really matter if my house burns because of pole drift or because of climate change? I don't like it burning either way. So if there is something I can do against my house burning, (and I know there are things I can do against that) I will definitely try that. And I believe we agree that we could do things, right?
Magnetic, rotational, geodetic .. ?
What are you trying to say?
> What are you trying to say?
Perhaps https://en.wikipedia.org/wiki/Cataclysmic_pole_shift_hypothe...
Might as well throw in the risk of being wiped out by a comet.
Climate risks are greater and more immediate than either comets or poles shifting.
Can there even be geodetic drift of the poles? I sort of assumed that our lat/lon system is based on the poles being fixed points as a matter of definition.
Each ellipsoid is rigidly defined (well, some historic ones are sloppy), so WGS84 won't drift .. (that's a bold statement, is it true down to the micron and if so what are the absolute* datums to reference against?).
That said, there are literally hundreds of historic pre WGS84 ellipsoid|datum pairings, each with a somewhat different "survey map pole".
Historically geodectic poles have shifted as a function of datums.
The main point here, such as it is, was to poke at the infomation free aspect of "polar drift" as a comment .. which pole and what does that have to do with climate change? etc.
2 replies →