A topographic survey measures and maps ground elevations and selected visible site features within a defined scope.
Definition
A topographic survey records ground elevations and selected site features to provide a base for planning and design. Depending on the agreed scope, it may include contours, structures, pavement, visible utilities, vegetation, or other features. The surveyor and client set the coverage, accuracy, methods, coordinate system, and deliverable format. Owners should check these limits against the design team's needs, since a sparse survey can leave gaps and a broader survey can take more effort. Concealed or subsurface conditions are generally outside the work unless separately investigated or documented through another service. A topographic survey is not a boundary survey, geotechnical investigation, or guarantee that every site feature has been captured. The ASCE provides resources for civil engineering professionals.
How owners use it
- Owners compare the proposed feature list and accuracy requirements with the planned design and construction use.
- Project managers record coordinate references and survey limits when sharing base information with disciplines.
- A survey includes 6 specified feature groups, and 2 are omitted from scope; 6 - 2 = 4 groups are covered.
- Teams coordinate survey timing with site access and design milestones, then document any needed updates.
