: How Google has mapped whole earth?
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Big ol cameras circling the earth from skies above can take thousands of pictures just by zooming into different parts of its own view.
The streets we’ve paved can be driven with a camera to map our cities, so long as we go there once, well have a permanent snapshot of that place. And there are a LOT of people working for google, all over the world, including people who aren’t employees, like small business owners taking pictures of their businesses
If you’re asking about satellite views, they didn’t. They license that data from other companies.
As for Street View, they can hire/contract people do drive around specific routes, or even walk/boat/whatever places that are not accessible by car. The street maps were already there (again, licensed from another company) so all they needed to do was come up with an algorithm, which is what Google is _really_ good at.
Remember that Street View took many years to complete, is far from being up to date, and there are still places you _cannot_ see on street view — the entire neighbourhood I live in, for example!
Big ol cameras circling the earth from skies above can take thousands of pictures just by zooming into different parts of its own view.
The streets we’ve paved can be driven with a camera to map our cities, so long as we go there once, well have a permanent snapshot of that place. And there are a LOT of people working for google, all over the world, including people who aren’t employees, like small business owners taking pictures of their businesses
They buy data from companies and assemble some themselves, but in short:
1) Satellites take photos. A satellite flying north-south will cover pole to pole, and the earth will rotate east-west below giving you full (somewhat low Res) coverage.
2) Software and humans stitch together photos – if there’s clouds you can use a different days photos for that spot.
3) high quality aerial footage taken from planes (as well as street footage for street view) is used in more populated areas of interest – compare a zoomed in view of rural North Korea to New York and you’ll see how much higher quality the latter is.
Some competitors, like Planet, take updated photos everyday – but Google just buys often quite old coverage.
Big ol cameras circling the earth from skies above can take thousands of pictures just by zooming into different parts of its own view.
The streets we’ve paved can be driven with a camera to map our cities, so long as we go there once, well have a permanent snapshot of that place. And there are a LOT of people working for google, all over the world, including people who aren’t employees, like small business owners taking pictures of their businesses
If you’re asking about satellite views, they didn’t. They license that data from other companies.
As for Street View, they can hire/contract people do drive around specific routes, or even walk/boat/whatever places that are not accessible by car. The street maps were already there (again, licensed from another company) so all they needed to do was come up with an algorithm, which is what Google is _really_ good at.
Remember that Street View took many years to complete, is far from being up to date, and there are still places you _cannot_ see on street view — the entire neighbourhood I live in, for example!
They buy data from companies and assemble some themselves, but in short:
1) Satellites take photos. A satellite flying north-south will cover pole to pole, and the earth will rotate east-west below giving you full (somewhat low Res) coverage.
2) Software and humans stitch together photos – if there’s clouds you can use a different days photos for that spot.
3) high quality aerial footage taken from planes (as well as street footage for street view) is used in more populated areas of interest – compare a zoomed in view of rural North Korea to New York and you’ll see how much higher quality the latter is.
Some competitors, like Planet, take updated photos everyday – but Google just buys often quite old coverage.
If you’re asking about satellite views, they didn’t. They license that data from other companies.
As for Street View, they can hire/contract people do drive around specific routes, or even walk/boat/whatever places that are not accessible by car. The street maps were already there (again, licensed from another company) so all they needed to do was come up with an algorithm, which is what Google is _really_ good at.
Remember that Street View took many years to complete, is far from being up to date, and there are still places you _cannot_ see on street view — the entire neighbourhood I live in, for example!
They buy data from companies and assemble some themselves, but in short:
1) Satellites take photos. A satellite flying north-south will cover pole to pole, and the earth will rotate east-west below giving you full (somewhat low Res) coverage.
2) Software and humans stitch together photos – if there’s clouds you can use a different days photos for that spot.
3) high quality aerial footage taken from planes (as well as street footage for street view) is used in more populated areas of interest – compare a zoomed in view of rural North Korea to New York and you’ll see how much higher quality the latter is.
Some competitors, like Planet, take updated photos everyday – but Google just buys often quite old coverage.
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