CT Land Surveyor key terms

A physical object such as an iron pin, stone, or drill hole set on the ground to mark a boundary corner or survey point. Its location controls over measurements in retracement.

Physical or documentary traces left by the survey that originally created a parcel, including set monuments, blaze marks, and recorded field notes. Retracement surveys seek and follow this evidence.

A survey performed to reestablish the location of existing boundary lines and corners created by a prior survey, without creating new boundaries. Its purpose is to follow, not correct, the original survey.

Boundary rights arising from occupation or use rather than deed language, such as adverse possession, practical location, and acquiescence. Connecticut courts recognize these doctrines in boundary disputes.

A boundary established by the express or implied agreement of adjoining owners, or by their acquiescence in a line for a long period, fixing the line even if it differs from the deed description.

Passive consent inferred from an adjoining owner's long silence or failure to object to a boundary line or occupation. Combined with a period of use, it can establish a practical location.

Acquisition of title to land by open, notorious, exclusive, continuous, and hostile possession for the statutory period. Connecticut's period for such claims is generally fifteen years.

A boundary line along a river or stream. Connecticut follows the common-law rule that a grant bounded by a non-tidal stream extends to the thread (centerline) unless the deed states otherwise.

A boundary along tidal water or the sea. In Connecticut the boundary of tidal and coastal land is generally the mean high water line, subject to statutory and common-law exceptions.

The average elevation of high tides over a reference period, used as the boundary between private upland and public tidal land. It is determined from tide records, not a single observation.

A reference surface derived from tide observations, such as mean low water or mean high water, used for mapping, boundaries, and elevation references in coastal areas.

The vertical reference surface for elevations in the United States, abbreviated NAVD 88. Connecticut surveyors use it for elevations and for relating local benchmarks to a common datum.

A durable mark with a known elevation or position used as a reference for surveys. Benchmarks may be published by NGS or established locally and must be described and recovered carefully.

The state plane coordinate system for Connecticut, based on the Lambert Conformal Conic projection and referenced to NAD 83. It provides a common grid for mapping and control.

A plane-rectangular coordinate system, defined for each state by a map projection and datum, used to express positions on a grid. Distances on the grid differ slightly from ground distances.

The ratio between a distance on a map projection or grid and the corresponding distance on the reference ellipsoid. Grid-to-ground corrections combine scale factor and elevation effects.

A mathematical method for representing the curved surface of the earth on a flat plane. Every projection distorts distance, direction, area, or shape to some degree.

A survey in which lengths and directions of a series of connected lines are measured to determine coordinates of points. It may be closed, open, or connecting known control points.

The difference between a computed position and a known or starting position in a traverse. Linear and angular misclosure are checked against standards to judge survey quality.

A statistical method that distributes measurement error among observations so that the sum of squared residuals is minimized. It also yields estimates of precision for adjusted values.

The difference between an observed value and its adjusted or computed value. Residuals reveal measurement error patterns and are used to evaluate survey accuracy.

The direction of a line measured as an angle from a north or south reference toward east or west, written with quadrant letters, such as N 45 E.

A horizontal direction measured clockwise from a reference meridian, usually north, through 360 degrees. Azimuths avoid quadrant letters but require a stated reference meridian.

A north-south reference line or direction from which bearings and azimuths are measured. Meridians may be true, magnetic, grid, or assumed, and the choice must be stated.

The angular difference between magnetic north and true north at a given place and time. It changes over time, so old deed bearings referenced to magnetic north require adjustment.

A property description that defines boundaries by courses (bearings), distances, and monuments, starting from a known point of beginning. It must close and be locatable on the ground.

The starting corner from which a metes and bounds description is run. A description must return to this point to close, and its location must be recoverable.

A description method that identifies a parcel by lot and block numbers on a recorded plat or subdivision map, together with the map's recording reference.

A map of a subdivision or land division showing lots, streets, easements, and monuments, prepared for recording. Once approved and recorded, it becomes the controlling description for the lots.

Local rules adopted under Connecticut statutes governing the division of land, including plat content, road standards, and review procedures. Surveyors must design plats to meet them.

Municipal ordinances controlling use, density, setbacks, height, and lot coverage. They affect site planning and may require surveys showing compliance before permits issue.

The minimum required horizontal distance between a building or structure and a property line, street, or other feature, as established by zoning regulations.

A right held by one party to use another's land for a specific purpose, such as access or utilities. Easements are shown on surveys and must be located and described accurately.

A strip of land dedicated or acquired for transportation or utility purposes. Its limits may be defined by deed, taking, or prescription, and surveys must locate them precisely.

A professional certified under Connecticut law to evaluate soils for subsurface sewage disposal and wetlands. Their findings often drive lot layout and subdivision design.

A scaled drawing showing existing conditions, proposed improvements, grading, drainage, utilities, and compliance with regulations. It supports local approvals and construction.

The planned alteration of ground elevations for construction, drainage, or access. Grading plans must respect boundary lines, easements, and stormwater requirements.

Earthwork in which material is removed (cut) from high areas and placed (fill) in low areas. Volumes are computed from cross sections or digital terrain models.

A line on a map connecting points of equal elevation. Contours show terrain shape and are used in topographic mapping, grading design, and drainage analysis.

The science of obtaining reliable measurements from photographs, including aerial imagery. It produces topographic maps, orthophotos, and digital elevation models.

An aerial photograph geometrically corrected so that it has a uniform scale and can be used like a map. It is common in mapping and land-use analysis.

A digital representation of ground surface elevation as a grid or triangulated network. It supports terrain analysis, volumetrics, and mapping.

Acquisition of information about the earth's surface from sensors on aircraft or satellites. It supports land-cover mapping, change detection, and environmental analysis.

A system for capturing, storing, analyzing, and displaying spatially referenced data. Surveyors use GIS for parcel mapping, asset management, and data sharing.

Regulations adopted by the Connecticut Board of Examiners for Land Surveyors setting minimum requirements for surveys, including accuracy, monumentation, and records. They define the standard of care.

The Connecticut state board that licenses land surveyors, administers examinations, adopts regulations, and handles complaints and disciplinary matters under state statutes.

A signed and sealed document, often a map, certifying that a survey was performed and meets applicable standards. It states the surveyor's professional opinion and responsibility.

The stamp, with signature and date, applied by a licensed land surveyor to work they prepared or directly supervised. Sealing work outside one's competence violates professional rules.

The ethical obligations of licensed surveyors, including competence, honesty, confidentiality, avoidance of conflicts of interest, and truthful reporting of findings to clients and the public.