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Semi-automated crater depth measurements.

Sylvain Breton1, Cathy Quantin-Nataf1, Thomas Bodin1

  • 1Université Lyon 1, France.

Methodsx
|November 1, 2019
PubMed
Summary

We developed a semi-automated pipeline to measure crater depth on Mars using digital terrain models (DEMs). This method provides a precise and statistically relevant dataset for understanding planetary surface evolution.

Keywords:
CrateringImage processingMarsSemi-automated crater depth measurementsSurface

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Area of Science:

  • Planetary Science
  • Geomorphology
  • Remote Sensing

Background:

  • Impact cratering is fundamental to planetary landscape evolution and surface dating.
  • Crater morphometry and degradation are crucial for understanding surface processes.
  • High-resolution digital terrain models (DEMs) offer new opportunities for detailed crater analysis.

Purpose of the Study:

  • To introduce a semi-automated pipeline for measuring crater depth using optical images and DEMs.
  • To calibrate and validate the proposed crater depth measurement method.
  • To provide a Python code implementation for the pipeline.

Main Methods:

  • A semi-automated pipeline integrating crater shapefiles and co-registered DEMs.
  • Crater depth calculation: difference between the 60th percentile elevation at the rim and the 3rd percentile elevation within the crater.
  • Statistical analysis and precision testing of the measured crater depths.

Main Results:

  • The pipeline enables rapid generation of large crater depth datasets for statistical interpretation.
  • The proposed method demonstrates high precision in crater depth measurement.
  • Percentile-based floor elevation is significantly more precise than using minimal elevation values.

Conclusions:

  • The developed pipeline offers a robust and efficient method for crater depth assessment on Mars.
  • This approach enhances the use of high-resolution DEMs for planetary surface studies.
  • The findings highlight the importance of precise morphometric measurements for understanding Martian geological history.