Updated May 2026 · Field Documentation Comparison
The Main Difference
The main difference between Sitemark and OpenSpace is that OpenSpace documents what a job site looks like — 360-degree photos mapped to floor plans and site plans — while Sitemark documents whether a job site was built to the correct elevations. OpenSpace is visual evidence of construction progress. Sitemark is quantitative evidence of construction accuracy. For grading and sewer contractors who need as-built elevation reports accepted by engineers and inspectors, visual documentation does not substitute for structured elevation records.
OpenSpace is a purpose-built visual documentation platform that uses 360-degree camera technology to capture comprehensive photographic records of construction sites. Contractors wear a 360 camera clipped to a hard hat or carry it through the site, and OpenSpace automatically stitches the footage into a spatial record mapped to floor plans or site plans. Project managers, architects, and owners can virtually walk through the site at any point in time, compare different dates, and see what was built when.
For general contractors managing complex commercial or industrial projects, the ability to provide visual documentation of every square foot of a job site at any point in construction history is a powerful risk management and client communication tool. Disputes about what was built, when, and in what condition are much easier to resolve with a complete photographic record than with photos taken at random by field crews.
OpenSpace does not capture elevation data. A 360 photo of a graded pad shows that the pad exists and is roughly flat — but it does not tell an engineer whether the pad corner is at 412.3 feet or 412.6 feet, and whether that is within the 0.1-foot tolerance of the approved grading plan. That distinction is the difference between visual evidence and verification evidence, and only verification evidence satisfies a soils engineer's as-built requirement.
Similarly, OpenSpace cannot document sewer inverts in the structured format that municipal inspectors require. A 360 photo looking into a manhole does not constitute an invert elevation record. An invert record requires: the manhole identifier, the incoming pipe direction, the design invert elevation, the measured invert elevation, the deviation, and the calibrated instrument used to take the measurement. Sitemark captures that structure. OpenSpace does not.
Equipment calibration records, field calculators, AI troubleshooting — these are absent from OpenSpace's feature set by design. OpenSpace is a specialized visual documentation tool and makes no claim to replace structured field verification workflows.
| Feature | Sitemark | OpenSpace |
|---|---|---|
| Grade shot logging with design comparison | Yes | — |
| As-built PDF from field elevation data | Yes | — |
| Real-time deviation flagging | Yes | — |
| Sewer invert documentation | Yes | — |
| Pad elevation certification support | Yes | — |
| Equipment calibration tracking | Yes | — |
| 360-degree site photo capture | — | Yes |
| Photos mapped to floor plans or site plans | — | Yes |
| Visual progress documentation | Yes | Yes |
| Daily reports | Yes | — |
| Free field calculators (40+) | Yes | — |
| AI field assistant | Yes | — |
| Purpose-built for precision grade work | Yes | — |
There are two distinct types of field documentation in construction: visual documentation (photos, 360 captures, video walkthroughs) and verification documentation (measured values compared to design requirements). Both have legitimate roles, and they are not interchangeable.
Visual documentation is useful for showing what was built, when, and by whom. It supports claims resolution, client communication, and general progress tracking. OpenSpace excels at this category. Verification documentation is useful for proving that what was built meets specification requirements. It supports engineering sign-off, municipal inspection acceptance, and PE certification. Sitemark excels at this category.
For grading and sewer contractors, the deliverable that matters is verification documentation — the structured elevation record that proves the finished grade meets the approved plan. Visual documentation supplements that record but does not replace it. A soils engineer who signs a rough grade certification is doing so based on measured elevations, not photos.
On larger commercial or institutional projects where the GC has deployed OpenSpace for visual site documentation, grading subcontractors still need Sitemark for their precision field verification work. The OpenSpace walkthroughs show the site condition; the Sitemark as-built shows the elevation verification. Both outputs become part of the project record, serving different stakeholders.
Grading contractors working on projects where OpenSpace is standard practice upload their Sitemark as-built PDFs into the project document system alongside the OpenSpace capture data. The combination provides both visual and quantitative documentation — a stronger project record than either tool alone.
OpenSpace captures 360-degree visual documentation of job sites. Sitemark captures structured elevation measurements, compares them to design, and generates as-built reports. They document different aspects of construction — visual versus quantitative verification.
No. OpenSpace is a visual documentation platform. It does not capture elevation measurements, compare to design, or generate as-built reports. Sitemark is the purpose-built tool for that workflow.
Yes. They serve complementary documentation needs — visual documentation through OpenSpace and elevation verification through Sitemark. Both outputs become part of the project record.
No. A soils engineer's rough grade certification is based on measured elevation data, not photos. Visual documentation supplements the record but does not constitute a verified as-built. Structured elevation records from a calibrated instrument are required.
Sitemark captures the structured elevation records, deviation analysis, and as-built reports that engineers and inspectors require — not just photos of the work. Start with a free trial on your next grading or sewer project.
Start Free Trial