Name: surveying methods for land and construction
Uploaded: 2025-08-29T12:09:54.000Z
Duration: 1 min 27 s
Channel: JoVE

Considérons une zone à la surface de la Terre avec des ondulations et des masses d’eau. Les techniques d’arpentage mesurent les longueurs et les largeurs d’une zone et identifient les niveaux du sol par référence à un système de référence. Ces techniques mesurent les angles des coins, les inclinaisons de lignes imaginaires dans des directions horizontales ou verticales, et les niveaux pour comprendre la forme et la taille des caractéristiques du terrain. Les levés plans sont effectués pour de petites zones, en considérant que la Terre est plate et en supposant que les lignes nord-sud sont parallèles. Les levés de bâtiments, de fermes et de la plupart des ouvrages construits sont des levés plans. D’autre part, les levés géodésiques prennent en compte la courbure de la Terre, ce qui les rend applicables à des zones plus petites et plus grandes. De grands levés, tels que le marquage des frontières nationales, sont effectués à l’aide de levés géodésiques. Les levés plans et géodésiques utilisent les élévations comme distances verticales au-dessus ou au-dessous du niveau moyen de la mer. La topographie est également utilisée pour mesurer les quantités de matériaux dans les travaux de construction, tels que les travaux de terrassement, pour le calcul des coûts. De plus, l’arpentage consiste à aligner les autoroutes le long de directions prédéterminées et à tracer des contours de capacité pour les réservoirs proposés.

introduction à l’arpentage, à l’arpentage au plan et aux levés géodésiques

Introduction to Surveying, Plane Surveying and Geodetic Surveys

L’arpentage est l’art et la science de la cartographie de la surface de la terre. Il s’agit de mesurer les distances, les angles dans des directions horizontales ou verticales et les niveaux pour comprendre la forme et la taille des caractéristiques du terrain. Les techniques d’arpentage sont essentielles pour diverses tâches, telles que l’identification des niveaux d’une zone terrestre par rapport à un point spécifique, et la cartographie des ondulations et des masses d’eau. Il existe deux principaux types d’arpentage : les levés plans et les levés géodésiques. Les levés plans supposent que la terre est plate, avec des lignes nord-sud considérées comme parallèles. Cette méthode est couramment utilisée pour la construction de bâtiments, l’aménagement de fermes et la plupart des autres travaux construits. Les levés géodésiques, quant à eux, tiennent compte de la courbure de la terre, ce qui la rend adaptée aux levés à petite et à grande échelle. Ce type d’arpentage est nécessaire pour les grands projets tels que le marquage des frontières nationales. Les levés plans et géodésiques expriment les élévations sous forme de distances verticales au-dessus ou au-dessous du niveau moyen de la mer. L’arpentage ne consiste pas seulement à cartographier la surface de la terre. Il joue également un rôle crucial dans la construction. En mesurant les quantités de matériaux, tels que les travaux de terrassement, l’arpentage aide à calculer les coûts, garantissant que les projets de construction respectent le budget. Qu’il s’agisse de projets de construction ou de démarcations étendues, l’arpentage fournit les données nécessaires à une planification et une exécution précises, ce qui en fait un outil indispensable dans l’industrie de la construction.

Introduction à l’arpentage, à l’arpentage au plan et aux levés géodésiques

Surveying is the art and science of mapping the earth's surface. It involves measuring distances, angles in horizontal or vertical directions, and levels ...

introduction-to-surveying-plane-surveying-and-geodetic-surveys

Education

Enseignement

JoVE Core

Civil Engineering

Génie civil

Unit 1

Unité 1

Introduction to Surveying

Introduction à l'arpentage

KEY TERMS AND CONCEPTS

TERMES ET CONCEPTS CLÉS

surveying methods for land and construction

Surveying is the art and science of mapping the earth's surface. It uses measurements of distance, horizontal and vertical angles, and levels to describe the shape and size of land features.

Surveying is also used to find the level of a land area with reference to a chosen point. It helps map land undulations and water bodies. These measurements give clear data for planning and field work.

Two main surveying methods are plane surveying and geodetic surveying. Plane surveying treats the earth as flat, and north-south lines are taken as parallel. It is commonly used for building construction, farm layouts, and most other constructed works.

Geodetic surveying accounts for the curvature of the earth. It is used for both small and large-scale surveys, including major work such as marking national boundaries. In both plane and geodetic surveys, elevations are written as vertical distances above or below mean sea level.

Surveying is important in construction as well as mapping. It can be used to measure material quantities, such as earthwork, for cost calculations. This helps keep construction projects within budget and supports accurate planning and execution.

Surveying Methods for Land and Construction

surveying-methods-for-land-and-construction

introduction to surveying, plane surveying and geodetic surveys

Surveying is the art and science of mapping the earth's surface. It uses measurements of distance, horizontal and vertical angles, and levels to describe the shape and size of land features. Surveying is also used to find the level of a land area with reference to a chosen point. It helps map land undulations and water bodies. These measurements give clear data for planning and field work. Two main surveying methods are plane surveying and geodetic surveying. Plane surveying treats the earth...

types of surveys

Survey Methods for Land and Water

Survey methods for land and water help define property boundaries and map features near water bodies. Each survey type has a different job. Together, they give accurate information for land-related projects and development. Land surveys mark property lines. Route surveys show the position of properties along nearby highways. Topographic surveys create maps by recording the three-dimensional features of the land. Hydrographic surveys examine underwater shapes and the movement of streams...

survey safety

Surveying Field Hazards and Protection

Surveying in the field can bring hazards from roads, rough ground, and nearby power lines. Safety starts with planning the work area and avoiding direct work on roads whenever possible. Surveyors often use offsets instead. An offset means measuring from a safer spot away from traffic. Highway work is especially dangerous and must include warning signs and flagmen. If surveyors must work along a road, they need to follow all safety guidelines. Bright clothing, such as orange reflective vests,...

errors and mistakes in surveying

Survey Measurement Errors and Common Mistakes

Survey measurements can be affected by errors and mistakes. These issues create inaccuracies in measured values and in the way data is recorded. In surveying, errors are unintentional deviations from the true value. They can come from human sensory limits, imperfect equipment, or outside conditions. Mistakes are different from errors. They happen when the surveyor loses attention, misunderstands a procedure, or makes a bad judgment call. Common examples include writing down the wrong value,...

distance measurements by taping

Survey Taping Tools for Accurate Distance

Survey taping tools help measure short distances accurately in the field. Surveyors use tapes because they are durable, flexible, and suited for outdoor work. Many tapes are made from lightweight, nylon-coated steel, which helps protect them from rust and wear. Standard tapes are often about 30 meters long and marked in meters and millimeters for precise readings. Surveyors choose a tape based on the site and the level of accuracy needed. Lightweight nylon-coated tapes are common because they...

taping over different ground profiles

Measuring Tape on Uneven Ground

Measuring tape on uneven ground requires careful setup to keep distance readings accurate. On smooth, level ground with little vegetation, the tape can rest directly on the ground. A taping team usually works with a head tapeman and a rear tapeman. The rear tapeman holds the tape at the start point and helps guide the head tapeman toward a range pole beyond the end point. They use hand signals or voice signals to stay aligned. On sloping ground, uneven terrain, or in dense underbrush, the tape...

distance corrections

Correcting Survey Distance Measurements

Survey distance measurements often need corrections to stay accurate. In surveying and construction, the first step is to adjust for standardization error, temperature changes, and slope. These corrections help turn an initial tape measurement into a more reliable final distance. Standardization error happens when measuring equipment changes over time. Wear, repairs, and weather can all affect the tape or tool. Surveyors compare the equipment readings with a standard to find any difference...

errors in taping

Survey Tape Measurement Mistakes

Survey tape measurements can be affected by several common mistakes that reduce accuracy. Misalignment of the tape is one major source of error. A rear tapeman can use a telescope to guide the head tapeman, but human limits still allow small mistakes in alignment, pin placement, and tape reading. Reading the tape can also be confusing when markings are worn with age. A surveyor may mistake a six for a nine or make other small visual errors. These reading mistakes become more common as the tape...

electronic distance measuring instruments

electronic-distance-measuring-instruments

Surveying With Light and Microwave EDMs

Electronic distance measuring instruments, or EDMs, help surveyors measure distance with electromagnetic signals. The instrument sends a signal to a target and then calculates how long it takes to return. This makes EDMs a precise tool for modern surveying. EDMs use two main signal types: light waves and microwaves. Light-wave EDMs use infrared or laser light, so they work well over short distances in clear weather. They give high accuracy, but atmospheric density and particles in the air can...

design example: measuring distance between two points with obstructions

design-example-measuring-distance-between-two-points-with-obstructions

Offset Method for Measuring Across Obstructions

The offset method helps surveyors measure distance across an obstruction such as a lake in a field. It is useful when a measuring tape cannot be stretched in a straight line over the blocked area. The method lets surveyors estimate the true length without direct line measurement. A surveyor starts by setting up a baseline that lines up with the side of the area across the lake. A telescope is used to check the alignment from one end of the side to the other. This creates an imaginary line over...

key terms and concepts

Learn how surveying measures land, levels, and distances. Explore plane and geodetic surveys, mean sea level, and how surveying supports construction costs.

Surveying Methods for Land and Construction | JoVE K12

JoVE Core Civil Engineering provides a foundational exploration of essential construction materials in civil engineering, focusing on bricks, stones, steel, wood, and concrete through easy-to-understand animated videos. This collection covers the properties, manufacturing processes, and practical applications of these materials. Additionally, the accompanied science-in-action videos demonstrate the research experiments performed in laboratories.

civil engineering

Surveying Methods for Land and Construction

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