Field Run Topographic Survey is the appropriate survey when which features are needed?

• A. Hydrographic survey only
• B. Cadastral boundary survey
• C. Field Run Topographic Survey is used when contours and mean high water line are needed
• D. Photogrammetry mapping only

Answer: (C)

Field Run Topographic Survey is used when you need elevation information along with surface features—specifically contours and the mean high water line. This method involves traversing the site and recording elevations at regular points, which lets you generate contour lines that depict slopes, elevations, and terrain shape. The mean high water line is a tidal boundary captured during the survey, essential for coastal or flood-related design and mapping. Hydrographic surveys focus on underwater depths, cadastral surveys map property lines, and photogrammetry relies on imagery rather than on-the-ground elevation verification for this level of detail. So, when contours and the mean high water line are required, field run topo is the appropriate choice.