OH Land Surveyor key terms

A State Plane Coordinate system established by Ohio statute, dividing the state into a north zone and a south zone, used to express positions on a common grid for mapping and engineering rather than for boundary evidence.

A conic map projection on which Ohio's state plane zones are based; it preserves angles locally, so grid azimuths and small shapes remain accurate, but scale error grows with distance from the standard parallels.

The multiplier that converts a distance measured on the state plane grid to the corresponding horizontal distance on the ground, combining projection scale error and elevation (sea-level) reduction for the survey's average elevation.

The product of the map projection scale factor and the elevation factor, applied to a grid distance to obtain ground distance, or inverted to reduce a ground distance to the grid.

The ratio of the ellipsoid radius to the ellipsoid radius plus orthometric height at a point, used to reduce a horizontal ground distance to its sea-level equivalent before applying projection scale.

A representation of the equipotential surface approximating mean sea level, used to convert between ellipsoidal heights from GNSS and orthometric heights referenced to a vertical datum such as NAVD 88.

A position computed by the National Geodetic Survey's Online Positioning User Service from submitted GNSS observations processed against continuously operating reference stations, reported in NAD 83 and often NAVD 88.

A permanently installed, precisely positioned GNSS receiver whose data are distributed for post-processing and real-time correction; in Ohio, a network of such stations supports survey-grade positioning.

A GNSS positioning method in which carrier-phase corrections are transmitted to a rover so coordinates are computed in the field to centimeter-level accuracy, subject to initialization and radio or network link quality.

A horizontal or vertical control point established or adopted by ODOT and referenced by a published description and coordinate value, commonly used to begin or check surveys tied to state projects.

A written document describing a survey monument's location, type, markings, and ties to nearby references, filed or retained as evidence of the point's identity and position for future retracement.

A physical object set or accepted at a boundary corner to mark its location, whose position, character, and accessories constitute the best available evidence of the original boundary location.

A corner established by the original public land survey, evidenced by the original monument or its remains; it controls over later surveys and over measurements that conflict with it.

A method of restoring a lost corner by distributing the excess or deficiency in measured distances proportionally along the line between the nearest existing original corners, rather than holding record bearings and distances.

A corner whose original monument and evidence of its location have been destroyed or are unrecoverable, so its position must be reestablished by accepted rules such as proportionate measurement or single-proportion methods.

A corner whose monument no longer exists but whose position can be recovered from evidence such as accessory monuments, bearing trees, or reliable testimony, so it is not treated as lost.

A tree recorded in the original survey notes with species, diameter, and bearing and distance from a corner, used as accessory evidence to reestablish or verify the corner's location.

The division of a public land survey section into aliquot parts such as half-sections and quarter-sections, following the order prescribed by the manual of survey instructions and controlling over later recorded plats.

A traverse line run along a body of water or other natural feature to determine the area of upland for survey purposes; it is not itself a boundary of the conveyed riparian land.

The line on a shore reached by water in ordinary seasons, distinguishing the bed subject to public rights from private upland; it is a question of fact, not a fixed elevation.

A boundary along a watercourse or lake, generally following the thread of a non-navigable stream or the ordinary high water mark of navigable water, subject to Ohio law and the circumstances of the conveyance.

A doctrine by which a person who occupies another's land openly, actually, exclusively, continuously, and hostilely for the statutory period may acquire title, potentially conflicting with the record boundary.

A right to use another's land acquired through open, notorious, adverse, and continuous use for the statutory period, distinct from ownership and often relevant to access routes shown on surveys.

A doctrine allowing adjoining owners to fix an uncertain boundary by agreement and subsequent acquiescence, binding successors even if the agreed line differs from the record line.

A boundary established by the actions and acquiescence of adjoining owners in a location treated as the line over a long period, recognized where the true line is uncertain and the parties intended to fix it.

A nonpossessory right to use another's land for a specific purpose, such as access or utilities; the servient land remains owned by its record owner and the burden runs with the land.

A strip of land encumbered by an easement or owned in fee for transportation or utility purposes; its limits and the estate conveyed must be determined from the instrument creating it.

A survey of a route's centerline with stationing, curves, and ties, used for highway, utility, and right-of-way work and to compute offsets to right-of-way lines and property boundaries.

A circular or spiral curve connecting two tangents in plan, defined by radius, degree of curve, tangent length, and arc length, and set out by deflection angles or chord offsets in construction layout.

A parabolic curve joining two grades in profile, defined by length, tangent grades, and the point of vertical intersection, used to provide sight distance and smooth transitions in roadway design.

A survey locating natural and cultural features and elevations of the ground, typically tied to a horizontal datum and a vertical datum, and delivered as a map or digital terrain model.

A line on a map connecting points of equal elevation, whose spacing indicates slope steepness and whose form reveals ridges, valleys, and drainage patterns.

A digital representation of ground surface elevations, often built from a triangulated irregular network or grid, used for volumes, drainage analysis, and design surfaces.

The earthwork of removing material (cut) and placing it (fill) to reach design grades, computed by comparing existing and proposed surfaces through average end area or prismoidal methods.

A stake set to indicate the design elevation of a construction feature, marked with cut or fill relative to a reference such as a hub or existing ground, used to guide grading operations.

A point of known elevation, often a durable monument or disk referenced to a vertical datum, serving as the starting value for leveling and construction grade control.

Regulations adopted under Ohio law governing survey practice, including standards for boundary surveys, plats, monumentation, and records filed with the county, enforceable by the state board.

The Ohio statute governing the practice of engineering and surveying, including licensure requirements, the state board's authority, and prohibited practices such as surveying without a license.

A document issued by the Ohio board permitting a business entity to offer surveying services, requiring a licensed surveyor to be in responsible charge of the firm's professional work.

The direct control and personal supervision of professional surveying work by a licensed surveyor who is accountable for its adequacy, including sealing and signing the resulting documents.

A map of a survey or subdivision filed with the county recorder or other designated office, showing boundaries, monuments, and dedications, and serving as public notice and evidence.