Surveying and Geomatics | 3. Smart Stations by Abraham | Learn Smarter
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3. Smart Stations

The chapter discusses the integration of GNSS and Total Station technologies in surveying, highlighting their increasing efficiency and accuracy in measurement tasks. It examines the applications, advantages, and limitations of Total Stations, along with calibration processes, error sources, and the functionality of global positioning systems (GPS). The evolution and impact of GNSS on various fields are emphasized, showcasing significant advancements in navigation capabilities.

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Sections

  • 3.3.6

    Smart Stations

    Smart Stations integrate GNSS and Total Station equipment to enhance surveying efficiency and accuracy.

  • 3.3.7

    Uses Of Total Stations

    Total Stations are essential surveying instruments used for angle measurement, distance analysis, and data acquisition in various applications, including mapping and crime scene analysis.

  • 3.3.7.1

    Measure Horizontal And Vertical Angles

    This section discusses the use of Total Stations for measuring horizontal and vertical angles, emphasizing their significance in surveying.

  • 3.3.7.2

    Obtain Horizontal And Vertical Distances

    This section discusses the use of Total Stations to measure horizontal and vertical distances in surveying.

  • 3.3.7.3

    Get The 3-D Coordinates

    This section explains how total stations are used to determine three-dimensional coordinates (x, y, z) in surveying.

  • 3.3.7.4

    Locate Points At Pre-Determined Distance

    This section covers the use of total stations in surveying to accurately locate points at pre-determined distances.

  • 3.3.7.5

    Plotting Of Contours

    Contour plotting involves the use of Total Stations to represent elevation changes on maps.

  • 3.3.7.6

    Creating Detailed Maps

    Creating detailed maps is one of the critical uses of Total Stations, which play a significant role in modern surveying.

  • 3.3.7.7

    Carrying Out Control Surveys

    This section discusses the role of Total Stations in carrying out control surveys, emphasizing their functionality, advantages, and the critical steps involved in ensuring accuracy during such surveys.

  • 3.3.7.8

    Estimate Excavations

    This section discusses the application of Total Stations in estimating excavations during surveying.

  • 3.3.7.9

    Crime Scene Investigations

    Total Stations play a vital role in crime scene investigations by ensuring accurate measurements of crime scenes.

  • 3.3.7.10

    Fix Missing Pillars

    This section discusses the various uses of Total Stations in surveying, particularly in fixing missing pillars.

  • 3.3.7.11

    Remote Distance Measurement (Rdm)

    Remote Distance Measurement (RDM) facilitates precise surveying by using various measurement techniques.

  • 3.3.7.12

    Missing Line Measurement (Mlm)

    This section discusses the Missing Line Measurement (MLM) technique as part of surveying using Total Stations.

  • 3.3.7.13

    Remove Elevation Measurement (Rem)

    The section focuses on the function and significance of the Remove Elevation Measurement (REM) technique used in surveying.

  • 3.3.8

    Advantages And Disadvantages Of Total Stations

    Total Stations offer several advantages for surveying, including speed and accuracy, as well as some disadvantages like cost and operational complexity.

  • 3.3.8.1

    Advantages

    This section highlights the major advantages of using Total Stations in surveying.

  • 3.3.8.2

    Disadvantages

    The disadvantages of using Total Stations for surveying include high costs, challenges in error checking, and the need for skilled operators.

  • 3.3.9

    Calibration Of Total Stations

    Calibration of Total Stations is crucial to ensure their high precision, reliability, and durability over time, as various factors can cause instrumental errors.

  • 3.3.10

    Errors In Total Station Measurements

    Total Stations encounter various error sources that can influence the accuracy of surveying measurements.

  • 3.3.10.1

    Circle Eccentricity Error

    Circle eccentricity errors occur in Total Station measurements when the mechanical axis does not align with the circle's center, significantly impacting angle readings.

  • 3.3.10.2

    Circle Graduation Error

    Circle graduation error arises from inaccuracies in the graduation markings on the measuring circle of a Total Station, affecting precise angle measurements.

  • 3.3.10.3

    Horizontal Collimation (Line Of Sight) Error

    Horizontal collimation error occurs when the line of sight is not perpendicular to the tilting axis of the Total Station, impacting measurement accuracy.

  • 3.3.10.4

    Tilting Axis Or Tilt Error

    Tilt error occurs when the tilting axis of the Total Station is not perpendicular to its vertical axis, leading to measurement inaccuracies.

  • 3.3.10.5

    Compensator Index Error

    The compensator index error in Total Stations occurs when the instrument is not properly leveled and can affect the accuracy of angle measurements.

  • 3.3.10.6

    Vertical Collimation Or Vertical Index Error

    Vertical collimation error occurs when the zero line in the vertical circle doesn't align with its vertical axis, affecting measurements.

  • 3.3.10.7

    Vertical Circle Error

    This section discusses vertical circle errors in Total Station measurements, along with their causes and compensating techniques.

  • 3.3.10.8

    Pointing Errors

    Pointing errors in Total Stations result from human factors and environmental conditions that impede clear vision of targets.

  • 3.3.10.9

    Uneven Heating

    Uneven heating refers to errors that can arise during Total Station measurements due to directional heat exposure.

  • 3.3.10.10

    Vibrations

  • 3.3.10.11

    Atmospheric Errors

    Atmospheric errors in Total Station measurements occur due to changes in temperature and pressure, requiring corrections for accurate results.

  • 3.3.10.12

    Optical Plummet Errors

    This section discusses optical plummet errors in Total Stations and their impact on measurement accuracy.

  • 3.3.10.13

    Adjustment Of Prism Poles

    This section discusses the importance of properly leveling prism poles and the errors that can occur if adjustments are not made.

  • 3.3.10.14

    Height Of Standards Error

    Height of standards error refers to inaccuracies in Total Station measurements occurring when the telescope axis is not perpendicular to the vertical axis, affecting measurement accuracy.

  • 3.4

    Global Positioning Systems (Gps)

    This section discusses the development, functionality, and significance of Global Positioning Systems (GPS) within the context of Global Navigation Satellite Systems (GNSS).

  • 3.4.1

    Technical Terms In Gnss

    This section outlines key technical terms related to Global Navigation Satellite Systems (GNSS), focusing on their definitions and significance in GNSS data collection.

  • 3.4.2

    Basic Principle Of Gps

    The GPS technology employs a straightforward principle of calculating the observer's position based on distances from known objects, utilizing trilateration.

  • 3.4.3

    Various Segments Of Gps

    The section covers the three main segments of the Global Positioning System (GPS): space segment, control segment, and user segment.

  • 3.4.3.1

    Space Segment

    The space segment of GPS involves a constellation of satellites that provide precise position, velocity, and timing data to users globally.

  • 3.4.3.2

    Control Segment

    The Control Segment of GPS is crucial for managing satellite operations and ensuring accurate positioning.

  • 3.4.3.3

    User Segment

    The user segment of GPS is crucial as it consists of receivers that translate satellite signals into usable data for navigation and surveying.

References

3b.pdf

Class Notes

Memorization

What we have learnt

  • GNSS and Total Stations enh...
  • Total Stations are versatil...
  • Calibration is essential fo...

Final Test

Revision Tests