3.2 ALTA, Boundary, Construction, and Final Review
Key Takeaways
- An ALTA/NSPS land title survey is a title-transaction deliverable built from boundary evidence, title documents, observed improvements, access, easements, and any authorized Table A items.
- A boundary survey is a professional opinion formed by reconciling record title, physical evidence, occupation, measurements, and controlling legal principles.
- Construction layout stakes planned work before construction; an as-built or record-drawing survey documents measured conditions after construction.
- Route, topographic, subdivision, and consultation work use different deliverables: alignments and offsets, surface models and breaklines, recorded plats and easements, or development-risk advice.
- Final mixed review starts by identifying the survey type, governing standard, intended deliverable, datum/control basis, and required QA/QC check.
Applied surveys: match the problem to the deliverable
NCEES lists Areas of Practice as a 24-36 question domain, the largest single range in the current PS specifications. These questions test whether you can recognize the survey type and choose the right workflow, evidence, standard, and deliverable.
The same site can need several surveys over its life cycle. A lender may need an ALTA/NSPS land title survey, a developer may need a topographic survey and subdivision plat, a contractor may need construction layout, and the owner may later need as-built records. Do not let one deliverable stand in for another.
ALTA/NSPS vs boundary survey
An ALTA/NSPS land title survey supports a real estate transaction and title insurance. It uses the title commitment, record descriptions, survey-related exceptions, observed improvements, access, easements, and authorized optional items.
A boundary survey is a professional boundary opinion. It may support an ALTA survey, subdivision, dispute, or design project, but its core task is evidence reconciliation.
| Feature | ALTA/NSPS land title survey | Boundary survey |
|---|---|---|
| Primary purpose | Support title insurance, lender review, buyer due diligence, and transaction closing. | Locate and explain a boundary opinion under governing law and evidence. |
| Key inputs | Title commitment, deeds, easements, agreements, access documents, field observations, and selected Table A items. | Deeds, plats, monuments, occupation, adjoiner evidence, measurements, and legal principles. |
| Main output | Survey map showing the boundary, improvements, access, easements, encroachments, and required certifications. | Plat, map, report, legal description, monumentation, or opinion explaining the resolved boundary. |
| Common trap | Treating Table A items as automatic or treating title work as a substitute for field evidence. | Treating a fence, GIS parcel line, or mathematical closure as conclusive without weighing evidence. |
Table A items are optional scope items. If the client wants zoning data, utility information, parking counts, or other optional matters, they must be negotiated and authorized. Even then, the surveyor reports within the limits of the selected item, available records, and observable evidence.
Construction layout vs as-built work
Construction layout turns design intent into field marks. It happens before or during construction and depends on correct control, plan interpretation, datum handling, grid-to-ground treatment, and independent checks.
Typical construction layout controls include:
- Verify horizontal and vertical control before staking.
- Confirm the plan revision, benchmark, datum, units, and scale basis.
- Compute layout from the design documents, then check from an independent setup or method.
- Provide clear cut/fill, offset, line, grade, and point-identification notes.
- Communicate conflicts before the contractor builds from bad assumptions.
An as-built or record-drawing survey documents what was actually built. It should show measured final positions, elevations, slopes, invert data, deviations from plan where relevant, the control or datum used, and the survey date or limits. It should not merely redraw the design plan.
Route, topographic, subdivision, and consultation work
Applied survey questions often hide the answer in the deliverable:
- Route and utility surveys: Use stationing and offsets along an alignment. Existing utility records, paint marks, and valve boxes are evidence to be mapped and qualified, not guarantees of exact subsurface location.
- Topographic surveys: Capture terrain and planimetric features with enough control, breaklines, and checkpoints to support the intended design or mapping use. LiDAR, photogrammetry, hydrographic soundings, and remote sensing still need control, metadata, and validation.
- Subdivision plats: Create new lots, parcels, units, easements, rights-of-way, dedications, and restrictions under local approval rules. The surveyor must connect new geometry to the parent boundary, title, monuments, access, zoning, and recording requirements.
- Consultation services: Identify development constraints before a full design or acquisition decision. Common issues include topography, slope, access, zoning, floodplains, easements, and boundary uncertainty.
Final mixed-review pattern
For final review, do not memorize survey names in isolation. Ask what the scenario is trying to deliver and what professional risk must be controlled.
| Scenario clue | First question to ask |
|---|---|
| Title commitment, lender, buyer, Schedule B, Table A | Is this an ALTA/NSPS land title survey and are optional items authorized? |
| Fences, old monuments, occupation, conflicting records | What evidence controls the boundary opinion? |
| Stakes, offsets, cut/fill, anchor bolts, plan revisions | Has control, datum, and layout been independently checked before construction? |
| Record drawing, installed utility, final elevation | Does the deliverable show measured built conditions rather than design intent? |
| Alignment, stationing, utilities, corridor | Are features tied to the route reference and qualified by source and reliability? |
| Contours, breaklines, point cloud, bathymetry | Are surface data controlled, classified, validated, and described with metadata? |
| New lots, easements, dedications, covenants | Does the plat satisfy title, geometry, monumentation, and local approval needs? |
When an answer choice preserves evidence, states the limits of reliance, checks control, documents the datum, or communicates a scope problem before release, it is usually closer to professional PS judgment than an answer based only on speed.
Relative Positional Precision under ALTA/NSPS
The 2021 ALTA/NSPS standard requires that the survey meet a Relative Positional Precision (RPP) limit, a statistical measure of the uncertainty in the position of one boundary corner relative to another, evaluated at the 95 percent confidence level from a properly weighted least squares or comparable analysis.
Two points to remember: RPP is a measurement-precision requirement, not proof that the boundary opinion is legally correct, and it applies between adjacent corners or monuments, not as an absolute coordinate accuracy. A survey can satisfy RPP and still be wrong if the surveyor held the wrong monuments or ignored senior rights.
Tying the survey type to its source documents
Each applied survey has a characteristic document set, and the exam often tests whether you reach for the right one. An ALTA/NSPS survey starts from the title commitment and Schedule B exceptions; a boundary survey from deeds, plats, and monuments; a construction survey from design plans, the benchmark, and control; an as-built from the design plan plus measured field conditions; a route survey from alignment plans and stationing; a subdivision from the parent deed, ordinance, and approval requirements. Choosing the wrong source set is a frequent distractor in scenario questions.
Encroachments, gaps, and overlaps
Applied surveys must report encroachments (an improvement crossing a boundary), gaps (unclaimed strips between adjoiner descriptions), and overlaps (descriptions that claim the same ground). These conditions are not the surveyor's to resolve by erasing them; the surveyor shows them, dimensions them, and notes the conflict so counsel, the title company, or a court can act. An ALTA survey in particular is expected to depict visible encroachments and the relationship of improvements to boundary and easement lines.
Final-review discipline
In the last review pass, run a fixed checklist on every deliverable: confirm the survey type and governing standard, the datum and control basis, grid-versus-ground treatment, the closure and RPP where applicable, the certification language, the easements and encroachments shown, and the limits of reliance. A deliverable that is mathematically clean but mislabels its datum, omits a Schedule B easement, or overstates accuracy will fail professional review even though the geometry checks. The exam's preferred answer is almost always the one that completes this discipline before release.
A lender orders an ALTA/NSPS land title survey and asks for observed utility information from Table A. Which statement is most accurate?
A contractor asks for column-line staking from revised plans, while the owner later requests documentation of the installed storm drain after construction. Which pairing best describes the two assignments?