Survey Works provides topographic surveys for civil engineers, architects, developers, and property owners working on projects across Texas. A topographic survey captures the three-dimensional shape of a piece of land, recording the location and elevation of natural and built features. Engineers use the deliverable to design grading, drainage, and foundation elevations. Architects use it to place buildings in relation to the existing terrain. Developers use it to evaluate a parcel before committing to a specific site plan and for feasibility studies.
Topographic surveys are commonly called topo surveys or topographic land surveys. The deliverable is a sealed survey drawing and CAD file showing the contours of the land, spot elevations on key features, and the location of structures, utilities, and other improvements that influence the design. Survey Works prepares the deliverable to whatever coordinate system and CAD format the design team requires.
What a topographic survey documents
Topographic surveys capture data related to the elevation changes of a property's terrain. Elevations: spot shots on key features, break-lines along ridges and drainage paths, and contours generated from point data across the site. Physical features: existing structures, hardscape, drainage features, and visible utilities. The data is referenced to a defensible coordinate system so it aligns with the boundary, adjacent surveys, and any existing site design.
The density of the data depends on the project. A site heading toward a detailed civil design gets a high-density topographic capture. A preliminary due-diligence scope can run lighter. Survey Works scopes the density to the decisions the data has to support, avoiding the cost of capturing detail the design team will not use.
When clients order a topographic survey
Most topographic surveys are ordered at the start of design. A civil engineer ordering the topo before beginning a grading and drainage plan needs contours accurate enough to support stormwater calculations and earthwork quantities. An architect ordering the topo before siting a building needs elevations on the proposed footprint. A developer ordering the topo as part of site due diligence needs enough coverage to validate the assumptions in the purchase decision.
Topographic surveys also come up on established properties planning additions or improvements, on sites with known drainage issues that need an engineered fix, on projects crossing difficult terrain where the design has to adapt to the land rather than the other way around, and on flood-prone parcels where an elevation certificate or grading plan requires documented ground elevations.
Traditional field methods vs. drone topography
Survey Works runs topographic surveys using both traditional rod-and-GPS field methods and aerial drone-based photogrammetry and LiDAR. The right method depends on the terrain, the vegetation, the accuracy requirements, and the size of the site.
"On small urban developments and heavily wooded parcels under 5 acres we still prefer traditional rod-and-GPS fieldwork because it gives us precise boundary measurement and more nuanced results. On mixed open terrain and moderately dense tree cover over 20 acres a drone run beats traditional topo by 2–3 days and delivers a high-fidelity Digital Terrain Model (DTM) and high-resolution imagery on the CAD side."
— Erik Olden, SIT
On small urban sites, wooded parcels, and any project where the accuracy of individual features such as a utility box or a specific elevation shot matters more than broad coverage, the field crew with a rod and GPS rover produces a cleaner result. On larger, more open terrain, the drone method collects far more data points in a fraction of the time, and the resulting DTM and orthorectified imagery give the design team more to work with downstream. Survey Works chooses the method during the initial scope conversation, based on the specific conditions of the site and what the deliverable has to support.
Survey Works has delivered topographic surveys across Texas for over 10 years, on everything from quarter-acre residential lots to multi-acre commercial sites and linear infrastructure corridors. Every project runs through the same process, with the capture method and data density calibrated to what the design team actually needs.
For a topographic survey anywhere in Texas, Survey Works has the field and aerial experience to deliver the terrain data the project needs in the format the design team works in.