1 : 31680 This plan covers an area of Lincolnshire from Thrustorpe in the north to Skegness in the south. Sandy beaches, characteristic of the coastline, are represented by banks of yellow dots on a paler yellow wash. The locations of various hotels are indicated along the coast. Further inland, symbols formed of three vertically inclined strokes above a short horizontal line are used to indicate salt marshes. Stevens, H.