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

Si consideri un'area sulla superficie terrestre con ondulazioni e corpi idrici. Le tecniche di rilevamento misurano le lunghezze e le larghezze di un'area e identificano i livelli del suolo con riferimento a un dato. Queste tecniche misurano gli angoli degli angoli, le inclinazioni di linee immaginarie in direzione orizzontale o verticale e i livelli per comprendere la forma e le dimensioni delle caratteristiche del terreno. I rilievi piani sono condotti per piccole aree, considerando la Terra piatta e assumendo che le linee nord-sud siano parallele. I rilievi per edifici, fattorie e la maggior parte delle opere costruite sono rilievi piani. D'altra parte, il rilevamento geodetico tiene conto della curvatura della Terra, rendendolo applicabile ad aree sempre più grandi. Indagini di grandi dimensioni, come la marcatura dei confini nazionali, vengono effettuate utilizzando il rilevamento geodetico. Sia i rilievi piani che quelli geodetici utilizzano le elevazioni come distanze verticali al di sopra o al di sotto del livello medio del mare. Il rilevamento viene utilizzato anche per misurare le quantità di materiali nelle opere di costruzione, come il movimento terra, per il calcolo dei costi. Inoltre, il rilevamento comporta l'allineamento delle autostrade lungo direzioni predeterminate e la tracciatura dei contorni di capacità per i serbatoi proposti.

introduzione al rilievo, al rilevamento aereo e ai rilievi geodetici

Il rilevamento è l'arte e la scienza di mappare la superficie terrestre. Implica la misurazione di distanze, angoli in direzione orizzontale o verticale e livelli per comprendere la forma e le dimensioni delle caratteristiche del terreno. Le tecniche di rilevamento sono essenziali per vari compiti, come l'identificazione dei livelli di un'area terrestre con riferimento a un punto specifico e la mappatura delle ondulazioni e dei corpi idrici.Esistono due tipi principali di rilevamento: i rilievi in piano e i rilievi geodetici. Le indagini piane presumono che la terra sia piatta, con le linee nord-sud considerate parallele. Questo metodo è comunemente usato per la costruzione di edifici, layout agricoli e la maggior parte delle altre opere costruite.Il rilevamento geodetico, d'altra parte, tiene conto della curvatura terrestre, rendendolo adatto sia per rilievi su piccola che su larga scala. Questo tipo di rilevamento è necessario per progetti di grandi dimensioni come la marcatura dei confini nazionali. Sia le indagini piane che quelle geodetiche esprimono le elevazioni come distanze verticali al di sopra o al di sotto del livello medio del mare.Il rilevamento non consiste solo nel mappare la superficie terrestre. Svolge anche un ruolo cruciale nell'edilizia. Misurando le quantità di materiale, come i lavori di sterro, il rilevamento aiuta nel calcolo dei costi, garantendo che i progetti di costruzione rientrino nel budget. Che si tratti di progetti di costruzione o di ampie demarcazioni di confini, il rilevamento fornisce i dati necessari per una pianificazione e un'esecuzione accurate, rendendolo uno strumento indispensabile nel settore delle costruzioni.

Introduzione al rilievo, al rilevamento aereo e ai rilievi geodetici

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

Didattica

JoVE Core

Civil Engineering

Ingegneria Civile

Unit 1

Unità 1

Introduction to Surveying

Introduzione alla topografia

KEY TERMS AND CONCEPTS

TERMINI E CONCETTI CHIAVE

Introduction to Surveying, Plane Surveying and Geodetic Surveys

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

Description

Transcript

Tags