It depends on how precise or pedantic you want to be. In the photo you provided, a single location for a vehicle would commonly be called a parking spot, particularly in the commercial transportation industry where each location is uniquely numbered. I would propose this as the best answer regarding the information you have given.
Another common term for the same thing is a parking space, though you are probably more likely to hear that term regarding locations along a street. Although these may also be numbered, it is not as common.
A parking stall impiles that there is a three-dimensional structure fencing in the location, though this, too, is a generally used term, particularly in an enclosed or walled-in area.
A parking bay is like a stall, but is typically a larger area that may contain multiple spaces or stalls for large vehicles, such as trailers or buses. Access is usually limited by walls or posts, as you would find in a multi-level parking deck or under a roofed area like a bus terminal.
Parking slot would not be incorrect, either. I would say this term should be reserved for locations that tend to be used by uniformly-sized vehicles. It also brings to mind an automated parking system where vehicles may have to be placed by some means other than simply driving into the space.
Parking lane would be for multiple vehicles, usually placed end-to-end in a queue. The last vehicle would be driven into one end of the designated area and the first vehicle would be driven out. Other vehicles in the line would typically have to wait until they are at one end or the other before they could be removed from the lane. Informally, this same term could be used for a line of parking spaces along a street or road where vehicles may parallel-park.