A surveyor's chart is a map used by surveyors to measure and record the size, shape, and elevation of land. It is also known as a PLAT, which is a four-letter word that is one of the solutions to this crossword. Surveyors use the chart to accurately measure and record the boundaries of a property, as well as the location of any structures or features on the land. The chart also includes information about the topography of the land, such as hills, valleys, rivers, and other features. The surveyor's chart is an important tool for surveyors, as it allows them to accurately measure and record the size, shape, and elevation of land.