Topography correction and the importance of applying it to the GPR records

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Courtesy of Geoscanners AB

Introduction

The subject of this article is to introduce you to the importance of applying topography correction to GPR (ground penetrating radar) records and to inform you about the possible ways of doing it. Although the basis is taken from the geography terminology, I would like to emphasize that the usage of terms ”topography correction” and ”topographic data” in this article, are used only in relation to the GPR records.

What are ”topography correction” and ”topographic data”?

Topography correction is a process of linking the topographic data with the GPR data. The topographic data is a group of points creating a curve that represents the real surface of the site where the GPR data was recorded. Each point in the group has its own elevation value showing a vertical difference from a defined point declared to be zero elevation/altitude.

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