How do I interpret resolution?

The better the resolution of an image, the smaller the pixel size in terms of centimeters. With a spatial resolution of 50 cm, each pixel corresponds to an area on the ground of 50 cm by 50 cm, but since the pixels will generally not perfectly align with the objects on the ground, an industry rule of thumb is that you can see consistently see objects that are between 30% and 50% larger than pixel size.