Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Influence of Earth's Curvature and Atmospheric Refraction on Leveling01:26

Influence of Earth's Curvature and Atmospheric Refraction on Leveling

171
During leveling, the Earth's curvature and atmospheric refraction introduce deviations in the line of sight from a true horizontal reference. When the line of sight is leveled, it remains perpendicular to the plumb line only at a single point. Beyond this, it deviates due to the Earth’s curvature, represented by the correction C. For a sight distance D, the deviation can be derived using the relationship:This relationship shows that the deviation increases quadratically with distance.
171
Types of Global Positioning System Surveys01:30

Types of Global Positioning System Surveys

91
GPS surveying methods vary in application, accuracy, and data collection techniques, catering to diverse surveying and mapping needs. Static GPS, kinematic GPS, and real-time kinematic (RTK) surveying are widely used. Each technique offers distinct advantages.Static GPS involves placing one receiver at a known reference point and another at the target point. It collects exact positional data by observing multiple satellite ranges over an extended period, achieving centimeter-level accuracy for...
91
Attenuated Total Reflectance (ATR) Infrared Spectroscopy: Overview01:13

Attenuated Total Reflectance (ATR) Infrared Spectroscopy: Overview

444
Attenuated total reflectance (ATR) infrared spectroscopy is a powerful analytical technique used to study the composition of materials. It is widely employed in chemistry, materials science, forensic science, and other fields where sample characterization is required. ATR has several advantages over traditional transmission IR spectroscopy, including the requirement of little to no sample preparation and the ability to analyze a wide range of samples.
The ATR process begins by directing a beam...
444
Precipitation Gravimetry01:03

Precipitation Gravimetry

6.7K
Precipitation gravimetry is based on converting an analyte into a sparingly soluble precipitate, which is separated by filtration and weighed. An ideal precipitate should be pure, insoluble, of known composition, and easily filtered from the reaction mixture.
In determining nickel by gravimetric analysis, a precipitant of ethanolic dimethylglyoxime is added to a hot nickel salt solution. This is quickly followed by the dropwise addition of dilute ammonia solution until precipitation occurs. A...
6.7K
Design Example: Identifying the Locations of Monuments in the Field Using Global Positioning System Device01:30

Design Example: Identifying the Locations of Monuments in the Field Using Global Positioning System Device

151
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...
151
Taping Over Different Ground Profiles01:12

Taping Over Different Ground Profiles

57
Taping over varying ground profiles requires careful adaptation to achieve accurate measurements. On smooth, level ground with minimal vegetation, the tape can rest directly on the ground. Here, the taping team, typically consisting of a head and a rear tapeman, coordinates their positions with clear communication. The rear tapeman holds the tape at the starting point and guides the head tapeman toward a range pole placed beyond the endpoint, using hand or voice signals to ensure alignment.On...
57

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Time-dependent citrate-mediated precipitation inhibition in uranium column leaching: Mechanistic insights into pore evolution and uranium migration.

Journal of hazardous materials·2026
Same author

Integration of machine learning and geospatial technologies for predicting forest cover change and carbon stock under Ethiopian Green Legacy Initiative.

Environmental monitoring and assessment·2026
Same author

Stattic enhances the anti-tumor activity of AZD4547 in LUSC by blocking STAT3/RRM2-mediated DNA repair and inducing ROS-driven mitochondrial dysfunction.

Cell death & disease·2026
Same author

Effectiveness and Safety of Recombinant Type III Humanized Collagen Solution Injection Combined With Collagen-III Multi-Peptide Serum in Improving Signs of Photoaging: A Prospective, Split-Face Controlled Clinical Trial.

Journal of cosmetic dermatology·2026
Same author

Spectrum of biopsy-proven kidney diseases in 3514 patients at a single center in Northwest China from 2014 to 2023.

Clinical and experimental nephrology·2026
Same author

Targeting metabolic dysregulation in HCC: Development and validation of a dual-biomarker diagnostic model integrating ADH1C and BHMT.

Clinics and research in hepatology and gastroenterology·2026
Same journal

Novel Parent Survey Measures Sensory Behaviors Incorporating Sensory Modality and Stimulus Intensity.

Heliyon·2026
Same journal

Expression of concern: "SQSTM1/p62 promotes the progression of gastric cancer through epithelial-mesenchymal transition" [Heliyon 10 (2024) e24409].

Heliyon·2026
Same journal

Expression of concern: "TL1A promotes metastasis and EMT process of colorectal cancer" [Heliyon 10 (2024) e24392].

Heliyon·2026
Same journal

Expression of concern: "Factors affecting timing of surgery following neoadjuvant chemoradiation for esophageal cancer" [Heliyon 9 (2023) e23212].

Heliyon·2026
Same journal

Expression of concern: "On stratified single-valued soft topogenous structures" [Heliyon 10 (2024) e27926].

Heliyon·2026
Same journal

Expression of concern: "Artifact removal and motor imagery classification in EEG using advanced algorithms and modified DNN" [Heliyon 10 (2024) e27198].

Heliyon·2026
See all related articles

Related Experiment Video

Updated: Aug 5, 2025

Tracking Infiltration Front Depth Using Time-lapse Multi-offset Gathers Collected with Array Antenna Ground Penetrating Radar
07:14

Tracking Infiltration Front Depth Using Time-lapse Multi-offset Gathers Collected with Array Antenna Ground Penetrating Radar

Published on: May 1, 2018

7.8K

Land subsidence analysis using synthetic aperture radar data.

Rida Bokhari1, Hong Shu1, Aqil Tariq1

  • 1State Key Laboratory of Information Engineering in Surveying, Mapping and Remote Sensing (LIESMARS), Wuhan University, Wuhan, 430079, China.

Heliyon
|March 27, 2023
PubMed
Summary
This summary is machine-generated.

Land subsidence threatens developing cities. This study used Sentinel-1A satellite data and Persistent Scatterer Interferometry (PS-InSAR) to map subsidence in Gwadar City, Pakistan, revealing significant land sinking near Koh-i-Mehdi Mountain and the deep seaport.

Keywords:
InSARLand subsidencePS-InSARSARPROZSentinel-1

More Related Videos

Time Multiplexing Super Resolving Technique for Imaging from a Moving Platform
06:25

Time Multiplexing Super Resolving Technique for Imaging from a Moving Platform

Published on: February 12, 2014

8.5K
Evaluation of an Exclusive Spur Dike U-Turn Design with Radar-Collected Data and Simulation
11:41

Evaluation of an Exclusive Spur Dike U-Turn Design with Radar-Collected Data and Simulation

Published on: February 1, 2020

20.5K

Related Experiment Videos

Last Updated: Aug 5, 2025

Tracking Infiltration Front Depth Using Time-lapse Multi-offset Gathers Collected with Array Antenna Ground Penetrating Radar
07:14

Tracking Infiltration Front Depth Using Time-lapse Multi-offset Gathers Collected with Array Antenna Ground Penetrating Radar

Published on: May 1, 2018

7.8K
Time Multiplexing Super Resolving Technique for Imaging from a Moving Platform
06:25

Time Multiplexing Super Resolving Technique for Imaging from a Moving Platform

Published on: February 12, 2014

8.5K
Evaluation of an Exclusive Spur Dike U-Turn Design with Radar-Collected Data and Simulation
11:41

Evaluation of an Exclusive Spur Dike U-Turn Design with Radar-Collected Data and Simulation

Published on: February 1, 2020

20.5K

Area of Science:

  • Geosciences
  • Remote Sensing
  • Urban Planning

Background:

  • Land subsidence poses a significant threat to urban infrastructure and development, driven by both natural and anthropogenic factors.
  • Gwadar City, a rapidly developing urban center and deep seaport under the China-Pakistan Economic Corridor (CPEC), faces potential risks from land subsidence.
  • Accurate monitoring of surface deformation is crucial for sustainable urban planning and disaster risk reduction in developing regions.

Purpose of the Study:

  • To quantify and map land subsidence in Gwadar City, Pakistan, using advanced satellite radar techniques.
  • To identify areas experiencing the highest rates of subsidence and analyze potential contributing factors.
  • To provide critical data for urban development and disaster monitoring initiatives in Gwadar.

Main Methods:

  • Acquisition and processing of 80 Sentinel-1A ascending and descending Synthetic Aperture Radar (SAR) images from July 2017 to July 2019.
  • Application of Interferometric SAR (InSAR) and Persistent Scatterer InSAR (PS-InSAR) techniques using SARPROZ software for precise deformation analysis.
  • Geospatial analysis and mapping of subsidence rates using ArcGIS 10.8.

Main Results:

  • PS-InSAR analysis revealed significant subsidence rates, with maximums of -92 mm/year (ascending) and -66 mm/year (descending) near Koh-i-Mehdi Mountain.
  • Subsidence rates of up to -48 mm/year (ascending) and -32 mm/year (descending) were recorded in the deep seaport area.
  • The study identified high subsidence rates across Gwadar City, highlighting the urgency of addressing the issue.

Conclusions:

  • The study confirms substantial land subsidence in Gwadar City, necessitating immediate attention for sustainable development.
  • The findings underscore the effectiveness of PS-InSAR as a remote sensing tool for monitoring millimeter-scale surface deformation in urban environments.
  • Addressing the identified subsidence causes is critical before further urban expansion and infrastructure development in Gwadar, especially in light of its economic importance via CPEC.