Saik0Shinigami

You are not getting a 3 dimensional location. That’s why GPS coordinates only exist on 2 planes. You don’t know what you’re talking about.

Proven wrong, as it's a "2d" map that only exists on a 3d plane. It's a slice of space that represents the moving target of "ground level". The point that this is a problem to take it as just a "2d map" is that you can't take 3 point readings from on top of a 1000 ft cliff and 3 feet away at the bottom of a cliff and expect 3 point measurements to actually give you accurate measurements since it's just "2d" right? Elevation matters as it needs to be accounted for during the calculations.

So which coordinate accounts for elevation? Latitude or Longitude?

Where elevation = ground. As stated...

Then you assert.

It’s like you’re making my point for me.

Which was in response to a post stating that the watch would need a 4th satellite or "elevation" in order to get a valid GPS value.

And after I further clarified for you how it works... again... and that I was NOT making your point. I assumed you simply didn't understand the point I was actually making.

My point, exactly

No... It wasn't your point at all because you asserted that GPS is 3 point triangulation. When it's 4 point Trilateration which only has the option of 3 point when the fourth value of elevation is already known, which the vast majority of devices that use GPS don't know.

What have I straw-manned? Can you point to it? What part of GPS needs 4 nodes/data points is vague?

Clearly you didn't... You keep asserting false statements that have already been disproven with sources.

But ultimately it’s the same thing. You need 4 pieces of input. Either 3 satellites AND elevation. Or 4 satellites.

If a watch doesn't "know" elevation (barometer or other sensor providing such information) as the fourth data point... Then it NEEDS 4 satellites to make the data points whole. Making your statements yet again wrong. I've covered the cases... but you keep pushing false statements like "gps is triangulation" (completely incorrect) or "GPS uses 3 satellites" which is also only correct in one very specific case... Where it's largely 4 or more, with reality being more like as many satellites as the device can read the pulses for. Often being a dozen or even more...

I am making accurate and complete statements. You are the one peddling misinformation.

Hell to prove the point... my time server grabs GPS as it's primary source. It grabs up to 12 satellites to sync time. It shows me my sync status for lat/long as well... At 3 satellites it CANNOT get a lock for location OR time. At 4 it gets a weak lock.

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Which is why they'd need 4 satellites. Read the whole post. Read the given sources. Stop being stupid.

A watch... or other simple gps device doesn't know what the elevation is.

Only one of the 2 selected points in a 3 satellite setup will be valid. And your device would have no idea which one is valid without elevation knowledge or a 4th satellite. Some devices can figure it out with just 3 satellites. Many/most won't. But ultimately it's the same thing. You need 4 pieces of input. Either 3 satellites AND elevation. Or 4 satellites.

So no. I've not made a point "for" you. You're just ignorant or specifically being obtuse on something you clearly don't understand.

Deleted your comment because you looked at the last image?

Edit: The images on the site depict the exact thing I've been referencing.

1 satellite = whole sphere of options.
2 satellites = a whole circle of options
3 = 2 points
4 = 1 point.

No.

Satellites project a sphere, you need 4 in order to get to a singular point. I've outlined each step. Fourth isn't for clock correction only. And even outlined why sometimes 3 is okay, but that requires additional logic that many gps devices sometimes can't compute, and even outlined that the vast majority of devices will use way more than 4.

https://gisgeography.com/trilateration-triangulation-gps/
https://www.gps.gov/multimedia/tutorials/trilateration/

Lat/Long is only valid if elevation is valid. You can't reference a lat/long that is miles into space... or beneath the crust of the earth.

You are not getting a 3 dimensional location. That’s why GPS coordinates only exist on 2 planes. You don’t know what you’re talking about.

Coordinates on a sphere is a 3 dimensional location. The earth isn't flat.

Edit: Please education yourself before you're so confident in your own bullshit answer. https://gisgeography.com/trilateration-triangulation-gps/ and https://www.gps.gov/multimedia/tutorials/trilateration/

Satellites broadcast a sphere, not a circle. And that sphere doesn't land on the earth as a perfect circle for relatively obvious reason... since the ground isn't perfect flat, nor is the earth perfectly spheroid.

No, you need 4 minimum.

Two satellites intersection places you on a circle. (all points possible)

Three satellites intersection places you on two possible points.

The last satellite give you the exact location.

However, the 4th can be omitted if one of the 2 points is not in a sane location. (eg well below the crust). And it's trilateration not triangulation.

The reality is that your phone/device will use like a dozen satellites.

Yeah I'm gunna be frank on this one... it's GOOD that it broke. If you're in a car fire (which these seem to do often), you want to be able to break out a fucking window to get out.

Any civilian that wants a window that strong is too stupid to properly risk evaluate the features of a car.

Ever heard of counting attempts? Log the IP, present a CAPTCHA after 100 requests in a minute.

Ever heard of IP rotation? This is one malicious source rotating through IPs over the course of 24 hours. They're attempting to credential stuff my logins ( on a production service ).

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not everything is about porn.

You speak only for yourself.