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Drafting Final Terms
Question | Answer |
---|---|
Planimetric | Northing and Easting |
Topographic | Northing, Easting, and Elevations |
Contour Lines | imaginary line connecting points of equal elevation |
Contour Intervals | difference in elevation between adjacent contour lines |
Types of Contours | Index, Intermediate, and Supplementary |
Contour Equation | X LP = (LP-RC)/(LP-RP) x Distance |
Cross Section | a view that cuts through an area to show detail that cannot be clearly identified in the plan view |
Profile | a cross section of a portion of land or along the length of a linear feature such as a road, sewer line, power line, or stream |
Vertical Alignment | defines the vertical form, or change in elevation, of a route on a vertical plane, or profile |
Profile Leveling | similar to standard differential leveling but additional intermediate shots are taken along the centerline of the route |
Plan and Profile | a type of drawing that combines the plan view of a project, or often a specific portion of a project, with the corresponding profile of the plan below |
Cutting Plane Line | a line drawn on a plan view to show the location of a cross section cut |
Invert Elevation | Represents the bottom inside of a pipe |
Vertical Alignment | defines the vertical form, or change in elevation, of a route on a vertical plane, or profile |
Vertical Curve | a feature that is provided to change vertical alignment between different slopes |
Sag Curve | a vertical curve that changes the vertical alignment of a road from downhill to level or downhill to uphill |
Crest or Summit Curve | a vertical curve that changes the vertical alignment of a road from uphill to level or uphill to downhill |
Tangent Distance | the measurement from the grade line to the profile of the curve at a station point |
Ordinate | the tangent distance from the top of the curve to the grade tangent line at each horizontal station point |
Earthwork | a term used in construction to describe quantities of earth excavated from or Filled areas |
Cut and Fill | a term used in construction to describe the method of cutting, or removing by excavating, material from a location to use to fill, or add, material to a different location |
Angle of Repose | the steepest slope at which a specific material is stable. The angle of repose is determined primarily by the type of soil or rock to be cut through or used as fill material. This value can be expressed as a horizontal angle or a ratio of run to rise. |
Percent Slope = Percent Grade | A 1% grade rises 1’ vertically for every 100’ horizontally. (1/100)(100) = 1% |
Full Station | 100 feet |
Plus Station | Specifies a point between full stations |
Stationing | locates station points every 100 feet from the beginning of the project |