Plan and Map Reading Flashcards

What is the purpose of a "legend" on a land survey map?

Answer: To explain the symbols and abbreviations used on the map

A legend on a land survey map serves as a crucial key, translating the various graphic symbols, line types, and abbreviations used into understandable terms. It ensures that anyone reading the map can correctly interpret the features and information presented. Without a legend, the specialized symbols used by surveyors would be meaningless to most viewers, hindering accurate understanding of the property.

In reading a topographic map, what does the contour interval represent?

Answer: The vertical distance between adjacent contour lines

On a topographic map, contour lines connect points of equal elevation. The contour interval represents the constant vertical difference in elevation between any two adjacent contour lines. This value is essential for understanding the steepness and overall shape of the terrain depicted on the map, allowing users to visualize changes in altitude.

What is the significance of "northing" and "easting" in coordinate systems?

Answer: They are used to describe the distances north and east of a specific origin point in a coordinate system

Northing and Easting are planar coordinates used in grid systems, such as UTM or State Plane Coordinate Systems. Northing measures the distance north from a specific origin point, while Easting measures the distance east from a central meridian or false origin. Together, these values provide a unique and precise two-dimensional location for any point within that particular coordinate system.

When reading a cadastral map, what does the term "parcel" refer to?

Answer: A unit of land that has been surveyed and mapped, often for legal or ownership purposes

On a cadastral map, which focuses on property boundaries and ownership, a 'parcel' refers to a distinct unit of land. This unit is typically defined by its legal description, ownership, and boundaries as determined by a survey. Cadastral maps and parcels are fundamental for property management, taxation, and legal transactions related to land.

What is the purpose of using "scale" on a map?

Answer: To represent the proportion of distance on the map to the actual distance on the ground

The scale on a map is fundamental for accurately interpreting distances and sizes. It establishes the precise ratio between a unit of measurement on the map and the corresponding actual distance on the ground. This allows users to calculate real-world distances and dimensions from measurements taken directly off the map, ensuring accurate spatial understanding.