2D Seismic QC – import

Data importing

The Geo Suite import inventory recognizes all the principle 2D seismic navigation data exchange formats.  These include:

  • UKOOA P1/78, P1/84, P1/90,
  • SEG P1,
  • SEG-Y
  • SPS (r and s),
  • SSH

All the navigation data is initially imported into Geo Suite Mapper through the standard data import function.  The data is imported into the project database that stores all the metadata, positioning data and computed attribute data for each of the seismic lines recognized in the dataset.

 

Data geo-referencing

Geo-referencing is an integral part of the import process.  The import wizard requires that a 2D projected or geographical CRS is assigned to the data.  The options provided are extracted directly from the EPSG database linked into the Geo DB module of the Geo Suite.

A late binding datum transformation architecture is used.  This means that the CRS definitions within the Geo Suite geodetic database do not have the coordinate transformation parameters assigned as part of the 2D geographical CRS definition.  As such a coordinate transformation model can be assigned to the 2D geographical CRS independently of its definition.  This allows the necessary flexibility demanded of the geomatics profession.

All data is stored within the project database referenced to the CRS assigned as part of the import process.   However, the data can be viewed within the Mapper module referenced to a different user selected CRS.  An ‘on-the-fly’ coordinate transformation is performed to convert the data between stored CRS and viewing CRS  (See viewing stage).

 

File format checker

Files being imported into the project are checked to determine whether they actually comply to one of the data exchange formats recognized within the Geo Suite inventory.

As part of the process a set of reports are generated establishing to which format(s) the import files comply.  Should the import file comply with none of the recognized file formats the function activates the Text Import Wizard that enables the analyst to create a user-defined import format.