Which of the following best describes the function of a route survey in practice?

• A. It is used for reconnaissance, preliminary survey and location survey for an alignment or linear feature
• B. It is used solely for boundary disputes
• C. It focuses on mapping entire regions from aerial photos
• D. It is identical to a hydrographic survey

Answer: (A)

Route surveying focuses on finding and documenting the best path for a linear project, like a road, rail line, or pipeline, by collecting data along a corridor to support planning and design. In practice, it combines reconnaissance, a preliminary survey, and a location survey for the alignment. The survey team investigates the terrain along the proposed route, noting topography, cross-sections, drainage, soils, existing utilities, access points, environmental constraints, and potential right-of-way needs. They establish control points and the route centerline so designers can evaluate options, estimate costs, and resolve constraints before detailed design begins. This type of survey is not primarily about resolving parcel boundaries—that’s boundary surveying—nor about broad regional mapping from aerial photos, which is photogrammetry, nor about hydrographic work, which focuses on water depths and submerged features.