NY Land Surveyor key terms

The process of re-establishing an existing boundary from its record description plus physical evidence on the ground, following in the footsteps of the original surveyor rather than creating new lines.

A natural or artificial object called for in a deed, or set by an original survey, that governs boundary location. When it conflicts with a course or distance call, the monument normally prevails.

A deed call stating a direction and a length for a boundary line. It is generally subordinate to calls for monuments, adjoiners, and areas unless the evidence shows the call was meant to control.

A deed reference to a named neighboring owner or adjoining parcel as a boundary. Because it identifies a specific person's land rather than a measurement, it ranks above course and distance in the hierarchy of calls.

A doctrine under which a boundary line, clearly marked and treated by adjoining owners as the true line for the required period, becomes binding even if it differs from the record description.

A claim by which a person who actually, openly, exclusively, and continuously occupies another's land under a claim of right for the statutory period may acquire title, subject to state-specific procedural requirements.

Acquisition of a right to use another's land, such as a driveway or access route, through open, notorious, adverse, continuous use for the statutory period, without the owner's permission.

The principle that when a grantor conveys parcels successively out of a larger tract, the earlier conveyance generally controls the location of the common line, so the later, junior deed yields to it.

A method of locating an uncertain boundary point by distributing the discrepancy between record and measured distances proportionally along the line, typically between original monuments that cannot be found.

A boundary along a navigable or tidal water. New York generally limits private upland ownership to the mean high water line and holds submerged land in the state, subject to grants and exceptions.

A gap or overlap created when adjoining parcels' record descriptions do not close on each other. Resolution depends on intent, monuments, senior rights, and whether a vacancy can be granted by the state.

A land title survey performed to detailed national standards that examines record title, ownership, boundaries, improvements, easements, and encumbrances for title insurance and commercial real estate transactions.

An electronic instrument combining an electronic distance meter with a theodolite and onboard computer, measuring horizontal and vertical angles and slope distances to compute coordinates of observed points.

Real-time kinematic satellite positioning in which a base station or network sends corrections to a rover, giving centimeter-level coordinates in the field within seconds, subject to datum, scale, and initialization checks.

A traverse that begins and ends at known points or returns to its starting point, providing redundancy so angular and linear misclosure can be computed and adjusted before coordinates are accepted.

An observation from a newly occupied station back to a known reference point, used to orient the instrument, establish the zero direction, and detect setup or centering errors.

A procedure that determines elevation differences by reading a graduated rod through a level from successive instrument setups, connecting points in a loop or line whose misclosure is checked.

The North American Datum of 1983, a geocentric horizontal reference frame realized through passive survey monuments and active GNSS stations. New York coordinates and state plane values commonly reference it.

The North American Vertical Datum of 1988, a vertical reference based largely on leveling and constrained to one tide gauge, from which orthometric heights in New York are expressed.

New York's part of the national State Plane framework, with four zones: Long Island, East, Central, and West. Each zone has its own projection constants, so a coordinate is unambiguous only when its zone is stated.

The separation at a point between the ellipsoid and the geoid, applied to GNSS-derived ellipsoid heights to obtain orthometric elevations. It varies with location because it reflects the gravity field.

The product of a map projection scale factor and an elevation factor, used to convert between ground distances and grid distances so measured lengths can be compared with state plane coordinates.

New York State's continuously operating GNSS reference network, which supplies real-time network corrections and post-processing data for survey-grade positioning tied to statewide coordinate datums.

A rectified aerial or satellite image corrected for camera tilt and terrain relief, so every pixel represents a uniform ground scale and the image can be used as a base map.

Light detection and ranging: an active sensor that measures laser pulse travel times to build dense point clouds, from which bare-earth terrain and above-ground features can be separated.

The radial shift of an image point away from the photo center caused by terrain elevation, which makes tall objects lean outward and must be corrected when mapping from aerial photography.

Root mean square error, a statistic summarizing the magnitude of positional differences between computed and reference values. National mapping accuracy standards express horizontal and vertical accuracy through it at stated confidence.

A statistical method that distributes random errors among redundant observations by minimizing the sum of squared residuals, yielding most probable coordinates, quality estimates, and detection of blunders.

The difference between an observed value and its adjusted or computed value. Residuals reveal the internal consistency of a network and feed the variance estimates that describe adjusted coordinate uncertainty.

A closed curve around an adjusted point showing the region in which the true position lies at a chosen probability, derived from the covariance matrix of the adjusted coordinates.

A traverse adjustment that distributes linear misclosure in proportion to each leg's length, after angular misclosure is distributed, and is typically applied to lower-order traverses.

Coordinate geometry: software or computational procedures that calculate bearings, distances, intersections, curves, and areas from coordinates, used to design and check boundary and route geometry.

The New York statute governing licensure of professional engineers and land surveyors, setting qualifications, examination requirements, scope of practice, and disciplinary authority administered through the State Education Department.

A governor-appointed advisory body to the Board of Regents that reviews credentials and advises on licensing, practice, and discipline issues affecting engineers and land surveyors in New York.

New York requires a licensee to sign and stamp each final map, plan, report, or survey document they prepare or approve, identifying the responsible licensed surveyor and the date.

Professional development required to renew registration in New York, including surveying-related coursework and ethics hours, documented and certified by the licensee at each registration renewal.

Grounds for discipline under New York law that include practicing beyond competence or scope, falsifying records, offering or accepting improper inducements, and signing work not personally prepared or supervised.