Geotechnical Engineering is a significant field of study in the discipline of civil engineering which primarily aims to understand the characteristics and composition of different soils, rocks, etc. This book aims to outline different data measurement systems and instrument used for assessment and evaluation in geotechnical engineering and related fields. The topics encompassed in this book elucidate some of the most significant techniques and instruments like magnetometer, data calibration mechanisms, remote sensing, etc. Researches and case studies included in this book are contributed by some of the most eminent experts and scientists in the field. Students and researchers actively engaged in the field will find this book full of crucial and unexplored concepts.