To provide survey control for subsequent exploration activities such as seismic surveys in areas where very little other control is available.

To provide survey control for subsequent exploration activities such as seismic surveys in areas where very little other control is available.

Source Data History: Historical data was sourced from survey reports and field data submitted by exploration companies as part of their statutory requirements when operating under Petroleum Exploration Licences. Since the gazettal of the new...

Source Data History: Historical data was sourced from survey reports and field data submitted by exploration companies as part of their statutory requirements when operating under Petroleum Exploration Licences. Since the gazettal of the new Petroleum Act in Sept2000 these data are required to be submitted in digital form. Attribute data associated with permanent Survey Marks includes Seismic line reference, seismic shot point nos., coordinates and elevation. Processing Steps: Hard copy data was manually input into PEPS data base and positional accuracy validated against accepted seismic line locations via Mapinfo Mapping package. Similarly digital data files are entered into PEPS once data lists have been reviewed for completeness and integrity.
Positional accuracy: The accuracy of the surveyed data is totally dependent on the survey techniques used to acquire the seismic line data and the quality of the horizontal and vertical control to which the survey was connected. Survey accuracy for seismic operations is defined to be better than 10*sqrt(traverse length in kilometres) expressed as centimetres for vertical accuracy and 2.5*sqrt(traverse length in kilometres) expressed as metres for horizontal coordinate accuracy.This is typical 3rd Order survey accuracy. Data has not been adjusted on account of subsequent surveys. Data is as it was originally presented.
Attribute accuracy:Attributes for each permanent marker have been sourced from field acquisition reports and digital files. This data has been accepted as presented and very little validation is possible except for positional accuracy of the points.
Logical consistency:The data set contains no duplicate points, is highly consistent and all points have a seismic line and shot point reference.
Completeness:Data set is approximately 85% complete (Pedirka Basin area to be populated). This will require back interpolation/transformation in Petroseis of original listing files which are based on Clarke 1858 spheroid onto the current GDA94 mapping system.

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