Construction Surveying and Layout

Construction Surveying: Site Control, Layout and Elevation Checks

Geo Vision Surveying Inc provides construction surveying for builders, general contractors, excavation and concrete crews, and developers across Southern Ontario. We transfer your approved engineering and architectural drawings onto the ground, check elevations at the stages that matter, and measure progress as the work goes in. You get one point of contact, a scope agreed before fieldwork, and field data your team can rely on.

What's Included

Every project is scoped to the drawings and the stage of construction. Typical tasks include:

• Site control and benchmarks: setting and checking control points and elevation benchmarks so every later layout ties to the same reference.
• Building and foundation layout: building corners, offsets, gridlines, footings, foundation walls, piers and anchor bolts for residential, commercial and industrial structures.
• Elevation checks before each pour: footing, slab and form elevations checked against the design while changes are still simple to make.
• Roads and site works staking: centrelines, curb and gutter, sidewalks, and storm, water and sanitary alignments from the supplied design.
• Earthwork and grading support: grade stakes, cut and fill marks and elevation checks for excavation and grading crews.
• Bridge and structural layout: survey support for defined bridge and structural layout packages, based on supplied engineering plans.
• Construction progress measurements: repeat measurements that document what has been installed, for project managers, owners and lenders.

When You Need a Construction Survey

• Before excavation, to set out the building or structure and the dig limits.
• Before footings and foundation walls are formed and poured.
• When gridlines, columns or anchor bolts must be placed for steel or precast.
• When curbs, sidewalks or underground services are being installed.
• At milestones, when an owner, lender or engineer needs proof of progress.
• Whenever something on site doesn't match the drawings and you need a fast check before the next trade starts.

Equipment and Methods

We work with robotic total stations and GPS/GNSS receivers, choosing the method to suit the site, the required tolerance and the stage of work. Tight structural layout is usually done by total station from established control. Open-site staking and grading work often uses GPS/GNSS. Layout is checked against control before we leave site, and tolerances are agreed with you before fieldwork starts.

All layout is performed from client-provided, approved drawings. Before any digging, the excavating contractor or owner requests utility locates through Ontario Dig Authority (formerly Ontario One Call). We can contract an Ontario Land Surveyor on your behalf.

Deliverables

Deliverables are tailored to each project and confirmed in the quotation. They may include:

• Marked stakes, nails, paint marks or offsets on site
• Layout and elevation check sheets
• Field coordinates and elevations in an agreed format
• CAD drawings of checked or as-installed features
• Progress measurement summaries for the project team

Our Process

1. Send the project information. Share the site location, approved drawings, schedule and the layout or checks you need.
2. Confirm the scope. We confirm control, tolerances, deliverables and timing, then send a clear quote.
3. Set and check control. We establish or verify site control and benchmarks before any layout.
4. Lay out and check. We stake or mark the agreed features and check them before leaving site.
5. Report. You receive the agreed check sheets, coordinates or drawings, and we stay available for the next stage.

See this work on real sites: bridge construction layout in Brantford, footing layout in Hamilton, foundation layout in Hagersville, foundation layout in North Dumfries and curb and sidewalk layout in Toronto. Before layout we often start with topographic surveys, and we finish with as-built surveys and grading surveys.