Photogeology and Regional Mapping

Photogeology and Regional Mapping

1st Edition - January 1, 1966

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  • Author: J. A. E. Allum
  • eBook ISBN: 9781483279596

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Photogeology and Regional Mapping covers the geological interpretation of aerial photographs, the compilation of the interpretations on to maps, the use of aerial photographs in the field, and the use of aerial photography for the production of the final geological map. This book is organized into 10 chapters and starts with an introduction to the aerial photograph. The subsequent chapters deal with the properties of the aerial photograph, including the scale, parallax and their difference. These chapters also survey the process of stereoscopy, the stereoscopic vision, pseudoscopic vision, and setting up the aerial photographs. These topics are followed by discussions on interpretation of the aerial photographs encoded into a map. Other chapters describe the production of the photogeological map and field mapping with the use of aerial photographs. The last chapters consider the compilation of the encoded aerial photographs made into maps and the photogrammetry for geologists that explains the minor control plot, detail plotting, measurement of height differences using a stereometer. This book will be of value to geologists.

Table of Contents

  • List of Plates



    1 The Aerial Photograph

    How Aerial Photographs Are Taken

    Errors in Flying

    Various Uses of Aerial Photographs

    Special Types of Aerial Photographs

    Ordering of Aerial Photographs

    Handling of Aerial Photographs

    Print Laydowns and Mosaics

    2 Some Geometrical Properties of Aerial Photographs



    Difference in Parallax

    3 Stereoscopy

    Stereoscopic Vision

    Viewing Stereopairs without a Stereoscope

    Pseudoscopic Vision

    Vertical Exaggeration


    Transference of Principal Points

    Setting up the Aerial Photographs

    Adjustment of Stereoscopes

    4 Interpretation — General

    Relief and Tone

    Factors Affecting the Photographic Appearance of Rocks


    Learning to Interpret

    Photogeological Symbols

    The Status of Photogeology

    5 Interpretation — Structural







    Lithological Boundaries

    6 Interpretation — Lithological

    Generalized Photogeological Legend

    Sediments and Metasediments

    Intrusive Rocks




    Extrusive Rocks


    Permeation Gneisses

    Autochthonous "Granites"

    Superficial Cover

    7 Production of the Photogeological Map

    Annotation and Interpretation Techniques

    Unmetamorphosed Areas

    Regionally Metamorphosed Areas

    The Photogeological Map

    8 Field Mapping with Aerial Photograph


    Preparing the Traverse

    Field Work

    Field Annotations

    Field Traverse

    Final Synthesis of Geological Data

    9 Compilation

    Reliable Base Maps Available

    Photographic Compilation

    Unreliable Base Maps Available

    No Base Maps Available

    10 Photogrammetry for Geologists

    Minor Control Plot

    Subsidiary Control Points

    Detail Plotting

    Measurement of Height Differences

    Use of Stereometer

    Height Difference Formulae

    Dip Formula

    Contours and Form Lines


    Recommended Reading


Product details

  • No. of pages: 124
  • Language: English
  • Copyright: © Pergamon 1966
  • Published: January 1, 1966
  • Imprint: Pergamon
  • eBook ISBN: 9781483279596

About the Author

J. A. E. Allum

Affiliations and Expertise

Overseas Geological Surveys, British Solomon Islands

About the Editor

Robert Maxwell

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