John Rocque’s 1746 Map?

Although this has been labelled as Rocque’s map of 1746, the original 24 sheet map does not extend this far north. I wonder if anyone knows whose map this really is and the date of it.

 

 

Land Utilisation Survey 1935

This is an unusual way to view an area. The key shows: light areas as Meadowland, purple areas as Gardens and Orchards, and pink areas as Land Agriculturally Unproductive