Topographic surveys for design and planning
A topographic survey records selected site features and elevations to help project teams understand existing conditions. Terrascribe plans field scanning and collection, aerial photogrammetry, or a combination of methods around the site, required coverage, control needs, and intended use of the mapping. The survey scope identifies the features to capture, level of detail, coordinate basis, and deliverable formats.
When appropriate to the site and project requirements, a GPS control network can tie field observations and scanning data to an agreed coordinate system. Control and source information are documented so design teams can understand how the mapping was positioned and what it represents.
Field scanning and collection
METHOD 01
Field Scanning & Collection
On-site fieldwork captures site features, elevations, and surface details. Total station and GNSS observations can be combined with terrestrial laser scanning or LiDAR-based capture, when suited to the site, to document building edges, pavement, curbs, accessible routes, and complex surfaces. Dense point clouds can support measurements and modeling of existing conditions.
METHOD 02
Aerial Photogrammetry
Aerial imagery can be processed into orthophotography and mapping data to document broader site conditions. Aerial coverage can complement field-collected details, while ground observations help address features that require additional measurement or verification. The appropriate method depends on access, vegetation, surface conditions, and the required accuracy and detail.
Mapping deliverables
Deliverables are selected with the client and design team to fit the project. Depending on scope, they may include:
- Site features, spot elevations, breaklines, contours, and site area calculations
- Orthophotography, point clouds, and terrain models
- AutoCAD deliverables and GIS spatial data in agreed formats
- Field notes and control information appropriate to the commissioned work
Project scope and deliverables vary with site conditions and intended use. Include the project location, available plans, coordinate requirements, schedule, and desired information when you request a quote.