The ocean floor looks like THIS?That is very weird.How do they even know this? It's not like they can take photos from satellites. I'm pretty sure they haven't gone over the entirety of the ocean's surface with echo sounding for some database.
>>526474278im convinced they are hiding many islands on google earth
>>526474278>what is lidar
Yep
>>526474278ship going beep beep beep
>>526474278> I'm pretty sure they haven't gone over the entirety of the ocean's surface with echo sounding for some database.Just the interesting bits, which is what you have pictured there.
>>526474278Lidar on a plane can cover a lot of territory in a single flyover. Ocean is pretty much an open empty space, there's no need to account for vegetation and human structuees. Its the same concept as echolocation but with lasers pulses.
>>526474811The amount of shipwrecks that have been found due to LIDAR is amazing. Having a clear picture of what you are diving down to makes recovery missions way easier.
>>526474633They have scanned the entire oceans with LIDAR satellites. It's just that most of the ocean floor is nothingness.
>>526474811How's that going to work with 3000 feet of water depth.
>>526474311they do censor and hide certain places from aerial but it's very obvious. There's too many players in the map game to hide something now.
>>526475031Use a wavelenght that water doesnt absorb
>>526474811Alright but the topic is also the ocean floor itself, not just the surveying technology. The fact it's super flat and then has that edge where it drops to greater depth, all those grooves and canyons in the edge, etc.
>>526475031While light (laser wavelengths) is eventually attenuated too much at great depth, sonar can be used at any depth with just less fidelity. As mentioned though, there are lots of 'patches' of poorly mapped ocean floor, but many many very good ones. This isn't new technology at all, but people having the computing power and platforms to do it quickly is more recent.
>>526475336have you seen the above earth?
>>526474979>>526474811lidar does not penetrate water well, it's not useful as a technique to mapping anything deeper than river bottoms and even then it's not done from a satellite.Lidar is not used for mapping the ocean floor on high level detail like this, it can be used by submersibles to get fine detail of wrecks or something but not topography data.
>>526474330no. Drumbf got rid of the EF
>>526474278As usual no one knows what they are talking about.Each satellite image costs google a lot of money they have to pay to the company that takes the photo with the satellite they stitch these photos together to make it look seemless but it really is not.So over areas like the ocean they dont bother wasting money on what would literally just be blue photos (70% of earth is ocean) and just give an artistic visualisation of what the ocean floor would look like from the sea floor topology.It is just saving money.
>>526474278No they haven't mapped the entire ocean floor. Not even fuckng close. What is your point?
>>526477290They want us to believe in space but they can't even map the ocean.
>>526475336>grooves and canyons in the edgeSea level was a little over 100m lower for 95% of the last 700,000 years.That's as far back as we have data. Probably been that way for millions of years.
>>526477426>he doesn't knowWhether you believe we can get to space or not, space as described is infinitely easier to engineer for than the deep sea. The maximum pressure differential you have to build for in outer space is 14.7lbs, 1 atmosphere compared to sea level pressure. You only have 14.7psi pushing out on the structure you're in. On the other hand underwater you only have to go about 30ft to hit 14.7psi inward pressure, and it doesn't stop rising as you go deeper. You're talking like 1000bar in the deepest ocean crevasses we know about. If SAR can't do it and we have to send hardware down there to scan physically that shit is infinitely gayer to build for than space. Conversely>he believes in oceanslmao
its a combination of satellite, aircraft and ship scan data.
>>526474811lidar schmidar
>>526474979low res bs that doesnt show details, thats why you still gotta drag boyeys under water to scan for a shipwreck
>>526480185Was expecting Saddam Hussein at the bottom. Am disappoint.
>>526474327>>526474811Just hand over the treasures you're hiding down there neptune and nobody gets hurt.
>>526474278dunno
>>526477173>He believes the lies of Big Mapngmi
>>526474979where's mh370 then
>>526484491shot over ukraine
