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GERDA - GEophysical Relational DAtabase

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INTEGRATED DATA MANAGEMENT

The geophysical database, GERDA, is tightly coupled to Jupiter, the national database for borehole information. Both databases have a well-defined open interface, which makes it feasible for software developers to create geophysical processing, interpretation and visualization software operating directly on the GERDA and Jupiter databases.

As an example GERDA forms part of an integrated system for the management and utilization of geophysical data. The system comprises the following components: the geophysical database GERDA, the national borehole database Jupiter, the Aarhus Workbench (a software package for processing, interpretation and visualization of electrical and electromagnetic data as well as preparation of these data for upload to GERDA) and GeoScene3D (3D visualization and modelling software).

Although the Danish Groundwater Mapping Programme pools data which are collected over many years using a wide range of different operators, instruments and methods, data are combined without any discrepancies at survey borders.

Below we present an example of a seamless map created with very little effort using the GERDA database and the Aarhus Workbench software.

The map covers a 50 x 60 km2 area of central Denmark. Substantial parts of the area were covered by TEM soundings (c. 83,000 soundings), collected during more than 90 mapping campaigns and using five different TEM systems over a time span exceeding ten years.

This presentation (1.5 Mb) gives a short introduction to the process of building a map from a GERDA database using the program Aarhus Workbench.

Map based on TEM data showing the elevation of the deepest low-resistive layer. Map area: 50 x 60 km. The 83.000 TEM soundings used to compile the map to the left.                                     

 

Illustration of the 94 mapping campaigns compiled to create the map above.          Illustration of the five different kinds of TEM equipment used for data collection.      

[Top]   Last modified: September 7, 2010 © Geological Survey of Denmark and Greenland - GEUS
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