EpiSeismic_PostStack2d

Derived From:

EpEntity_Entity, EpiSeismic_SeismicDataset

Capabilties:

read

Column Summary
Type	Name and Description
String ro	KeyString Unique identifier for each table entry.
FloatSeq ro db	CDP The Common Data Point (CDP) associated to each seismic trace defined by the TraceStart, TraceEnd, and TraceDelta data extent.
String ro req db	SeismicGeometry The LineGeometry2d associated with the PostStack2d.
StringSeq ro db	ShotpointLabel Contains the entire Shotpoint label defined by the TraceStart, TraceEnd, and TraceDelta data extent.
FloatSeq ro db	ShotpointNumber The numeric Shotpoint associated to each seismic trace defined by the TraceStart, TraceEnd, and TraceDelta data extent.
ULong ro req db	TraceDelta Identifies the seismic trace decimation factor.
ULong ro req db	TraceEnd Identifies the trace index of the last seismic trace in the data file.
ULong ro req db	TraceStart Identifies the trace index of the first seismic trace in the data file.
PointSeq ro db	XY The Map X and Y location associated to each seismic trace defined by the TraceStart, TraceEnd, and TraceDelta data extent.

 

Columns inherited from EpiSeismic_SeismicDataset

ActualExtent, Comment, CompressionFactor, DeltaZ, DomainType, Extent, MaxZ, MinZ, Name, NumSamplesPerTrace, NumTraces, OwnedByProject, SampleDataType, SampleKind, SampleMax, SampleMin, SampleUnit, SeismicElevationDatum, SeismicElevationDatumUnit, SeismicElevationReference, StorageDataType, UnitsZ

 

Columns inherited from EpEntity_Entity

LastModifiedDate, Name, Project, ProjectName, StoreInstallationName, StoreType

 

Column Detail

KeyString

Unique identifier for each table entry.

ShotpointNumber

The numeric Shotpoint associated to each seismic trace defined by the TraceStart, TraceEnd, and TraceDelta data extent. If the Shotpoint is alphanumeric, this column only contains the numeric portion of the label. For example, if the Shotpoint is "100A" this column would only contain 100 and exclude the "A". The array length identifies the number of traces that exist for the PostStack2d and should be the same value as returned by NumTraces. The first array element will correspond to the trace identified by TraceStart and the last array element will correspond to the trace identified by TraceEnd.

CDP

The Common Data Point (CDP) associated to each seismic trace defined by the TraceStart, TraceEnd, and TraceDelta data extent. The array length identifies the number of traces that exist for the PostStack2d and should be the same value as returned by NumTraces. The first array element will correspond to the trace identified by TraceStart and the last array element will correspond to the trace identified by TraceEnd.

ShotpointLabel

Contains the entire Shotpoint label defined by the TraceStart, TraceEnd, and TraceDelta data extent. For example, if the Shotpoint is "100A" this column would contain "100A". If the Shotpoint is numeric (e.g. 100) this column would contain a stringified form of the numeric (e.g. "100"). The array length identifies the number of traces that exist for the PostStack2d and should be the same value as returned by NumTraces. The first array element will correspond to the trace identified by TraceStart and the last array element will correspond to the trace identified by TraceEnd. It is possible for some of the Shotpoints to be unknown. In this case, the values are set to an empty string.

TraceStart

Identifies the trace index of the first seismic trace in the data file. Please refer to important documentation for the EpiSeismic_LineGeometry2d XY column. The trace index is respective of the LineGeometry2d and valid values are between zero and the LineGeometry2d's NumTraces-1 value. Trace indexes are used by the PostStack2d accessors for reading/writing seismic traces. TraceStart and TraceEnd should be used when reading traces or updating existing traces. The LineGeometry2d's NumTraces column should be used when writing new traces. Zero is the minimum valid trace index value. TraceStart is always less than or equal to TraceEnd.

SeismicGeometry

The LineGeometry2d associated with the PostStack2d.

TraceEnd

Identifies the trace index of the last seismic trace in the data file. The trace index is respective of the LineGeometry2d and valid values are between zero and the LineGeometry2d's NumTraces-1 value. Trace indexes are used by the PostStack2d accessors for reading/writing seismic traces. TraceStart and TraceEnd should be used when reading traces or updating existing traces. The LineGeometry2d's NumTraces column should be used when writing new traces. LineGeometry2d's NumTraces-1 represents the maximum valid trace index value. TraceEnd is always greater than or equal to TraceStart.

TraceDelta

Identifies the seismic trace decimation factor. Normally this value will be one which indicates a seismic trace can exist at each possible trace position along the 2D line. A value of two indicates a seismic trace can only exist at every other trace position along the 2D line. The higher the delta the fewer traces can exist which means the data is more sparsely populated.

XY

The Map X and Y location associated to each seismic trace defined by the TraceStart, TraceEnd, and TraceDelta data extent. The Z component of the points should be ignored. The array length identifies the number of traces that exist for the PostStack2d and should be the same value as returned by NumTraces. The first array element will correspond to the trace identified by TraceStart and the last array element will correspond to the trace identified by TraceEnd. Please refer to important documentation for the EpiSeismic_LineGeometry2d XY column. Clients should always set the coordinate system when retrieving this column so they know the exact coordinate system the points are returned in; otherwise, the points will be returned in the default coordinate system and each vendor store might have a different default.