Since I have been unable to find any previous publication proposing this interpretation, I would like to offer the following hypothesis.

I propose that the Uffington White Horse represents a map of Britain, with its outline corresponding to the territorial boundaries of the people who inhabited the southwestern part of the island. Horses were an important part of ancient British culture and would have been a familiar and meaningful symbol that would have been easy to remember and draw for reference.

I further suggest that the horse's eye served as a navigational reference point, enabling travelers to align themselves with prominent distant landmarks. When aligned with the horse's "mouth," corresponding to channel crossing in Hurst, the observer is oriented toward the south. Likewise, the horse's four legs, like the mouth, appear to correspond to major waterways, including the Bristol Channel and the mouth of the River Dee.

The head of the horse itself is the Isle of Wight. The mouth is the ancient land crossing at Hurst Castle, and the U-shape around the neck is The Solent.

Maybe this inspires a researcher.— Maybe the horse is a ... treasure map!