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Related Concept Videos

Design Example: Maintaining Level of an Embankment01:19

Design Example: Maintaining Level of an Embankment

Constructing a roadway embankment over uneven terrain requires precise leveling to ensure stability and proper drainage. Surveyors use a leveling instrument and staff to calculate ground elevations and determine the required fill material at each point along the embankment alignment.The process begins by positioning a leveling instrument near a benchmark with a known elevation. A backsight reading establishes the instrument height, which serves as a reference for subsequent measurements. A...
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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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Topographic maps represent the Earth's surface features using contour lines, which connect points of equal elevation to create a two-dimensional representation of three-dimensional terrain. Creating a topographic map requires a systematic approach.Begin by plotting a scaled grid and marking intersections corresponding to the survey's elevation data points. Assign elevation values at these intersections to build the base map. Next, determine contour levels using a consistent contour interval,...
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Methods of Obtaining Topography

Topography involves measuring and mapping land elevations, natural features, and artificial structures to create accurate representations of the terrain. Topographic surveying relies on traditional and modern methods, each with distinct advantages and limitations.Traditional Surveying Methods:Transit stadia surveys and plane table surveys were widely used traditional surveying methods. These techniques relied on instruments like theodolites and stadia rods for measuring distances and angles,...
Latitudes and Departures01:27

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Latitudes and departures are essential concepts in surveying, providing a systematic way to analyze the projections of traverse lines. These projections allow surveyors to interpret a line's north-south and east-west components, which are crucial for precisely calculating areas, bearings, and lengths. Latitude is the north-south projection of a line, calculated as the product of the line's length and the cosine of its bearing. Departure, conversely, is the east-west projection obtained by...
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Surveyors use Global Positioning System (GPS) technology to measure the precise location and elevation of points on Earth. In a recent survey, GPS receivers were used to determine the coordinates and elevations of two park monuments. The process involved careful mission planning, data collection, and correction to ensure accuracy. The survey began with mission planning to identify optimal satellite visibility and minimize Position Dilution of Precision (PDOP). A geodetic control point served as...

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Orienteering as a Tool for Cognitive Research: An Implementation Guide
07:13

Orienteering as a Tool for Cognitive Research: An Implementation Guide

Published on: November 29, 2024

Reorienting with terrain slope and landmarks.

Daniele Nardi1, Nora S Newcombe, Thomas F Shipley

  • 1Department of Psychology, Temple University, Spatial Intelligence and Learning Center, Philadelphia, PA 19122, USA. d.nardi@uniroma1.it

Memory & Cognition
|October 12, 2012
PubMed
Summary

Spatial orientation relies on frames of reference. This study found that while men and women use spatial cues similarly for reorientation, men report higher confidence, potentially explaining why some women struggle with terrain slope navigation.

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Area of Science:

  • Spatial cognition
  • Human navigation
  • Environmental psychology

Background:

  • Orientation is crucial for navigation, establishing spatial frames of reference for location and direction.
  • Vertical environmental cues, like terrain slope, offer vital spatial information for nonhuman animals.
  • Humans exhibit significant individual and sex differences in utilizing terrain slope for reorientation.

Purpose of the Study:

  • Investigate sex differences in using terrain slope for spatial reorientation.
  • Explore the impact of environmental complexity on reorientation strategies.
  • Identify potential reasons for difficulties some individuals, particularly women, experience with slope-based reorientation.

Main Methods:

  • Tested human participants in a complex environment with both a tilted floor (slope) and distinct landmarks.
  • Analyzed participants' use of directional (slope gradient) versus positional (landmarks) cues.
  • Assessed encoding of, reliance on, and confidence in using different spatial strategies.

Main Results:

  • Participants predominantly focused on either slope or landmark cues, rather than integrating both.
  • No significant sex differences were found in encoding or reliance on the two strategies.
  • Men reported significantly higher confidence than women in solving the reorientation task.

Conclusions:

  • The tendency to rely on a single strategy may hinder effective reorientation in complex environments.
  • Differences in spatial confidence, not strategy use, may underlie sex-based variations in slope-based reorientation.
  • Lower spatial confidence in women could be a contributing factor to difficulties with terrain slope navigation.