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Related Concept Videos

Surveys02:16

Surveys

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Often, psychologists develop surveys as a means of gathering data. Surveys are lists of questions to be answered by research participants, and can be delivered as paper-and-pencil questionnaires, administered electronically, or conducted verbally. Generally, the survey itself can be completed in a short time, and the ease of administering a survey makes it easy to collect data from a large number of people.
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Introduction to Surveying, Plane Surveying and Geodetic Surveys01:27

Introduction to Surveying, Plane Surveying and Geodetic Surveys

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Surveying is the art and science of mapping the earth's surface. It involves measuring distances, angles in horizontal or vertical directions, and levels to understand the shape and size of land features. Surveying techniques are essential for various tasks, such as identifying the levels of a land area with reference to a specific point, and mapping undulations and water bodies.There are two main types of surveying: plane surveys and geodetic surveys. Plane surveys assume the earth is flat,...
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Errors and Mistakes in Surveying01:19

Errors and Mistakes in Surveying

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Errors and mistakes in surveying refer to inaccuracies in measurements and data recording. The errors are deviations from the actual value caused by human sensory limitations, equipment flaws, or environmental effects. These errors are typically unintentional and can result from the inherent imperfections in the instruments used, atmospheric conditions, or the observer’s inability to perceive exact measurements. On the other hand, mistakes are caused by the surveyor's lack of...
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Types of Surveys01:27

Types of Surveys

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Surveys are essential for marking property boundaries near water bodies. Different types of surveys are defined, each with its own function. Land surveys mark the property boundaries, while route surveys determine the position of properties on nearby highways. Topographic surveys create maps by capturing the three-dimensional features of the land. Hydrographic surveys focus on the shapes of underwater areas and the movement of streams through the properties. Mine surveys determine the relative...
374
Survey Safety01:28

Survey Safety

419
Surveying near highways, rough terrain, or power lines involves significant risks. Working along highways is particularly dangerous and requires the use of warning signs and flagmen. It is safest to avoid working directly on roads and use offsets whenever possible. When highway work is unavoidable, it must follow all safety guidelines. Surveyors should wear bright clothing, such as orange reflective vests, to ensure visibility to motorists, coworkers, and hunters. In construction zones, wearing...
419
Topographic Surveying and Contours01:29

Topographic Surveying and Contours

1.0K
Topographic surveying is critical for documenting the Earth's surface, focusing on capturing elevations, slopes, and natural and man-made features. It is essential in construction planning, water resource management, and land-use analysis. The primary outcome of such surveys is a topographic map, which uses contour lines to visually represent the shape and slope of the terrain, providing valuable insights into the landscape's characteristics.Contour lines are fundamental to understanding the...
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Related Experiment Video

Updated: Feb 14, 2026

Methods for Image-based Surveys of Benthic Macroinvertebrates and Their Habitat Exemplified by the Drop Camera Survey for the Atlantic Sea Scallop
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Methods for Image-based Surveys of Benthic Macroinvertebrates and Their Habitat Exemplified by the Drop Camera Survey for the Atlantic Sea Scallop

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Cosmology with the Large Synoptic Survey Telescope: an overview.

Hu Zhan1, J Anthony Tyson2

  • 1CAS Key Laboratory of Space Astronomy and Technology, National Astronomical Observatories, A20 Datun Road, Chaoyang District, Beijing 100012, People's Republic of China.

Reports on Progress in Physics. Physical Society (Great Britain)
|February 24, 2018
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The Large Synoptic Survey Telescope (LSST) will revolutionize cosmology with deep-wide-fast imaging. It will probe dark energy using multiple cosmological probes, enhancing our understanding of the Universe.

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Area of Science:

  • Cosmology and astrophysics
  • Dark energy physics
  • Precision cosmology

Background:

  • The Large Synoptic Survey Telescope (LSST) is an advanced imaging facility under construction in Chile.
  • LSST features a large aperture, wide field of view, and a high-resolution camera for deep, wide, and fast astronomical surveys.

Purpose of the Study:

  • To outline the LSST cosmology program, focusing on dark energy investigations.
  • To detail how LSST data will enable precision cosmology with enhanced statistical power and systematic error control.

Main Methods:

  • LSST will conduct a 10-year survey across six passbands (ugrizy) with extensive sky coverage and revisit times.
  • It will utilize diverse precision probes: large-scale structure, weak lensing, supernovae, galaxy clusters, and strong lensing.
  • Data will be combined with cosmic microwave background data for robust cosmological model testing.

Main Results:

  • LSST data will provide unprecedented statistical power for cosmological studies.
  • The facility is designed for tight control of systematic errors, crucial for precision cosmology.
  • LSST will offer deep and fast time-domain observations alongside its main survey.

Conclusions:

  • LSST is poised to open a new era in precision cosmology, particularly in understanding dark energy.
  • Data accessibility for scientific communities and collaborations with other surveys will maximize scientific return.
  • LSST observations will lead to a more comprehensive understanding of the Universe.