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Just_Graf2018-09-23 18:45:15
satellite navigation
Just_Graf, 2018-09-23 18:45:15

What are the services that provide up-to-date satellite images?

And satellite images are needed in high resolution.
I know about Google and Yandex maps, of course.

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6 answer(s)
D
dollar, 2018-09-24
@dollar

The resolution is equal to the wavelength divided by the lens diameter. For visible light (wavelength 550nm) and a lens diameter of 1m, the resolution will be 0.1".
Let the satellite be located at an altitude of 600 km. Then, armed with school trigonometry, we calculate that the resolution will be 29cm. A car with a length of 4m will occupy 13 pixels.
In general, it is quite difficult to surpass this indicator, except to shoot a lens of 2m or more into orbit, but it is not so easy, and no one needs it, so you should not expect a resolution of 20cm or better in the future.
However, do not forget that satellite images are often supplemented by aerial photography. This, although it comes out more expensive, but gives better quality pictures. Of course, no one will cover the entire planet with such images.

D
Dimonchik, 2018-09-23
@dimonchik2013

and who takes Yandex , do you know?

R
Roman Vladimirovich F., 2018-09-24
@FiLinX

By the way, here are a few related tools:
Google Map Alerts - https://followyourworld.appspot.com/
Timelapse - Google Earth Engine - https://earthengine.google.com/timelapse/
EOS Platform - EARTH OBSERVING SYSTEM - https ://eos.com/platform/
And of course the main mapping program on your computer:
SAS.Planet (SASPlanet) - http://www.sasgis.org/wikisasiya/doku.php/general_com...

T
Terratech, 2021-08-09
@Terratech

You can order a new shooting or selection of images according to the parameters on our website: https://terratech.ru/services/kosmicheskaya-syemka/
You can also buy satellite images yourself in our cloud service: https://cloud.terratech.ru/ #/
A large archive of images from Russian and foreign spacecraft. High and ultra-high resolution up to 30 cm per pixel.

G
GEO_INNOTER, 2021-10-01
@GEO_INNOTER

Geospatial Agency Innoter is the official distributor of all leading operators of Earth remote sensing satellites (ERS), supplies new satellite images from optical and radar satellites.
Contact us, we are ready to help you choose the optimal space imagery for solving your problem
https://innoter.com/products/prostranstvennie-dann... .

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