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Science & Alternative Science / Re: NASA’s Latest Moon Actors
« on: September 25, 2023, 02:26:11 PM »Also imagine this ichoosenonsense clown telling construction workers and engineers that they need to do their jobs differently and get new tools because level doesn't mean straight, it means curved because the Earth is "round".For projects where the deviation would make a difference, like the LIGO project they DO take it into account. For smaller structures it not only would be difficult and expensive but would serve no purpose so they do not do so.
lol The "LIGO GPS curvature proofsie" card. "GPS is mapped to follow the curve, so the curve exists because we use GPS and it works!". "We accounted for curvature because the GPS says so".
No, it's not just small structrue. No one accounts for curvature no matter the size of the structure. If you think so provide the blueprints as evidence. Not stories. Real blueprints that we know for a fact were used to build real things.
Sometimes though the existing maps aren't accurate enough. Here's some details going into digging the cross-rail tunnels under London. Due to the small gap that the tunnels had to go through, between existing infrastructure and other tunnels, existing maps were found to only be accurate to 20cm per KM in a 3d space due to the curvature of the Earth. So a new co-ordinate system was produced.
https://learninglegacy.crossrail.co.uk/documents/building-a-spatial-infrastructure-for-crossrail/
https://www.engineeringsurveyor.com/software/1-026%20-%20Topographical%20Surveys%20and%20Mapping.pdf
The following link talks about how engineers and surveyors are attempting to display routes of long train infrastructure on a 2d plane on blueprints. You will probably be interested in figure 1 showing a simplified version of the ratio that has to be applied to convert from one to the other.
https://learninglegacy.hs2.org.uk/document/advances-in-engineering-survey-grid-transformations-for-rail-infrastructure/
Quote
To demonstrate the reasons for using the HS2 Snake Projection, imagine a line approximating the route from London to Birmingham. Measuring the line first in British National Grid, and then measuring again in HS2 Snake Projection would reveal an apparent increase in length of 60 metres. In fact, the length of the project on the ground did not change – it is just that the British National Grid is a best-fit for the whole country which means the map distortion is far in excess of what is appropriate for precision engineering required on projects like HS2.