What is the concept of high-scoring satellite resolution of 2 meters?

The first explanation: two objects can only be separated if they are more than 2 meters apart, and less than 2 meters is regarded as a part of the city.

The second explanation: if the visible length and width of the object in the direction of the satellite lens are less than 2 meters, the photo of the object is only a pixel, that is, a small point, and the irregular shape, pattern and other details of the object cannot be seen. Only when its size is more than 2 meters, it will occupy more than 1 pixels in the photo, and it is possible to see its shape, pattern and other details.

The above two explanations are actually synonymous.

The following is from the Internet:

Ground resolution is an important index to measure the technical level of optical imaging satellites. Resolution refers to

The minimum distance between two objects in an image, not the minimum size of the object that can be seen. For example, the resolution on Google satellite map is about 1 meter. That is, when the distance between two people exceeds 1 m, two people can be seen in the image. When the distance between two people is less than 1 m, the images of two people are integrated, and only 1 points can be seen in the images.

A target with a plane size of about 1m is just a pixel on an image with a ground resolution of1m. Generally speaking, no matter how many times the image is enlarged, it is just an image point. However, the ground resolution does not reflect the smallest size of the ground object that can be "seen" from the image. In the visible satellite image with the resolution of 1 m, people whose vertical projection size is much smaller than 1 m can see it completely, but the green tents in the green space whose size is much larger than 1 m can't see it.