Grade Check

The Grade Check tool lets you click multiple points on the map and compare their survey elevations against the design surface. Each point is classified as pass, marginal, or fail based on a configurable tolerance, with colour-coded markers on the map and a detailed results table. This is your primary tool for QA on finished surfaces.

Activating the Tool

Open the Measurements tab in the site detail floating panel and click the Grade Check icon, or press K on your keyboard. The cursor changes to a crosshair.

⚠️ Watch out!

The Grade Check tool requires a design surface to be loaded for your site. Without a design surface, SiteView has no target elevation to compare against and the tool cannot be activated. Upload a design surface file (DXF or KML/KMZ) before using this tool.

Placing Check Points

Click on the map to place grade check points. Each click creates a new check point:

1. Click to place a point — SiteView immediately reads the survey elevation (from the DEM) and the design elevation (from the design surface) at that location
2. Continue clicking to add more check points across the area being checked
3. Each point is instantly classified and displayed as a colour-coded marker

There is no need to double-click to finish. You can keep adding points for as long as you need. The results table updates with each new point.

💡 Tip

Place check points on a regular grid across the surface being checked — for example, at 5-metre or 10-metre intervals. Also add points at critical locations such as drainage points, junction with other surfaces, and edges of the work area.

Configuring Tolerance

Before or during the grade check, set the tolerance that defines the acceptable range. The tolerance selector offers preset values and a custom option:

The tolerance is applied symmetrically — a 50mm tolerance means the survey elevation can be up to 50mm above or 50mm below the design level and still pass.

Pass, Marginal, and Fail Classification

Each check point is classified based on how its survey elevation compares to the design elevation:

Marginal points are within tolerance but close to the boundary, giving you an early warning that the surface is drifting towards non-compliance.

ℹ️ Did you know?

The marginal classification is a visual aid — it does not mean the point has failed. A marginal point is technically passing but is close enough to the limit that you may want to investigate further or take additional readings in that area.

Map Display

Each check point is displayed on the 3D globe as a colour-coded marker:

• Green circles for pass points
• Amber circles for marginal points
• Red circles for fail points

The markers are sized and positioned to be clearly visible without obscuring the underlying surface data. You can see at a glance which areas of the surface are within tolerance and which need attention.

Results Table

The results panel shows a table with one row per check point:

The table also shows a summary row at the bottom with:

• Total points checked
• Pass count and percentage
• Marginal count and percentage
• Fail count and percentage

Practical Uses

• Subgrade verification — check that the subgrade level is within tolerance before placing road base or structural fill
• Finished surface QA — verify that concrete slabs, pavements, and graded surfaces meet design levels
• Kerb and gutter — spot-check kerb flow-line levels against the design
• Building pads — confirm that the building pad has been graded to the correct RL before construction begins
• Drainage grades — check that invert levels at pits and channels match the design

💡 Tip

Run a grade check at the start of each site visit to establish the current state of the surface. Save the results with the date and any notes about remedial work required. Over multiple visits, the saved grade checks create a record of surface accuracy throughout the project.

Changing Tolerance After Checking

You can change the tolerance at any time after placing points. All existing points are reclassified immediately using the new tolerance. This lets you quickly see, for example, how many points would pass at 20mm versus 50mm tolerance without re-measuring.

Saving the Measurement

Click Save to record the grade check. The saved record includes all check points, their elevations, differences, classifications, and the tolerance used. Add a category, notes (such as the area checked and the specification reference), and photos. Saved grade checks appear in the Measurements tab and can be recalled to display the colour-coded markers on the map.

What's Next?

• Cross-Section — generate cross-section profiles comparing survey and design
• Volume & Stockpile — calculate cut/fill volumes against the design surface
• Measurement Tools Overview — return to the full list of measurement tools