Surveying Glossary — Letter R

A specialized surveying discipline that establishes precise horizontal and vertical control along railway corridors to support design, construction, and maintenance of rail infrastructure.

Random error is an unpredictable deviation in measurement results caused by uncontrollable variables that affects surveying accuracy equally in all directions.

A range pole is a straight, slender surveying rod, typically 2 meters long, marked with alternating colored bands and used to establish sight lines and mark survey points in the field.

A GNSS surveying method that combines the accuracy of static positioning with reduced observation times, typically requiring 5-30 minutes of data collection depending on baseline length and satellite geometry.

Raster data is a digital image format composed of a grid of pixels or cells, each containing a single value representing geographic or spatial information used in surveying and mapping applications.

Unprocessed measurements and observations collected directly from surveying instruments in the field before adjustment, analysis, or conversion to final coordinates.

A mathematical model of Earth's shape used as a reference surface for geodetic measurements and coordinate system definitions in surveying.

A reflective target is a surveying accessory featuring retroreflective material designed to enhance the accuracy and range of electronic distance measurement instruments by returning light signals to their source.

Reflectorless EDM measurement is an electronic distance measurement technique that calculates distances by analyzing the intensity and return time of infrared light reflected from natural surfaces, eliminating the need for reflective prisms.

Reflectorless measurement is a surveying technique that uses infrared light to measure distances directly to natural surfaces without requiring a prism or reflector target.

Remote sensing is the science and technology of obtaining information about objects or areas on Earth's surface without physical contact, using satellite imagery, aerial photography, and sensor data.

Resection is a surveying method that determines the position of an unknown point by measuring angles from that point to three or more known reference points.

Revit Survey Integration is the process of importing and linking surveying data from field instruments into Autodesk Revit BIM software to establish accurate site coordinates and ground conditions for architectural and construction projects.

A right of way survey is a specialized land surveying procedure that establishes, documents, and marks the legal boundaries and physical extent of property rights granted for public or private passage, utilities, or infrastructure corridors.

RiSCAN PRO is advanced scanning software that processes and manages 3D laser scan data from terrestrial and mobile scanning systems for surveying and mapping applications.

Root Mean Square (RMS) is a statistical measure used in surveying to quantify the magnitude of measurement errors and assess the accuracy of survey data by calculating the square root of the average of squared deviations.

Root Mean Square Error (RMSE) is a statistical measure used in surveying to quantify the accuracy of measurements by calculating the square root of the average of squared differences between observed and true values.

A specialized surveying process that determines the horizontal and vertical alignment, dimensions, and physical characteristics of roads and transportation corridors for design, construction, and maintenance purposes.

A motorized surveying instrument that automatically tracks and measures distances and angles to a reflective prism, enabling remote operation and increased efficiency in field surveying.

Real-Time Kinematic positioning is a satellite-based surveying technique that provides centimeter-level accuracy by transmitting GPS/GNSS corrections in real-time to a rover receiver.

RTK drone surveying is an advanced geospatial method combining unmanned aerial vehicles with Real-Time Kinematic positioning technology to achieve centimeter-level accuracy in mapping and surveying applications.

Real-time kinematic GNSS positioning is a surveying technique using satellite signals and ground-based correction stations to achieve centimetre-level accuracy in real-time field measurements.

A real-time, centimeter-level GNSS correction service that delivers precise positioning data through internet connectivity, eliminating the need for local reference stations in surveying operations.