EpiInterpretation_HorizonGrid1d

Derived From:

Capabilties:

read

Column Summary
Type	Name and Description
String ro	KeyString Unique identifier for each table entry.
StringSeq ro db	HorizonGrid1dProperties The properties associated to the HorizonGrid1d.
String ro req db	HorizonGrid1dSet Identifies the associated horizon 1d grid collection.
String ro db	LastModifiedDate The date the data was last changed in the data store returned in the following format: "YYYY-MONTH-DAY HOUR:MINUTE:SECOND" For example, "1998-10-22 20:15:50"
StringSeq ro req db	OriginTypes Identifies the data source, typically the LineGeometry2d and possibly the PostStack2d that were used for the interpretation.
StringSeq ro req db	OriginValues Unique row identifier for the tables returned in the OriginTypes column.
String ro db	PatchName Name of the individual pieces that compose the whole.
String ro db	PrimaryZPropertyKey The z-value property key to the HorizonGrid1dProperty table.
String ro db	PrimaryZPropertyName The z-value property name.
ULong ro db	TraceDelta Identifies the grid decimation factor.
ULong ro db	TraceEnd Identifies the seismic trace index of the last non-null horizon value in the data file.
ULong ro db	TraceStart Identifies the seismic trace index of the first non-null horizon value in the data file.
PointSeq ro db	XY The X and Y values associated to each one-dimensional grid value defined by the TraceStart, TraceEnd, and TraceDelta data extent.

 

Column Detail

KeyString

Unique identifier for each table entry.

TraceStart

Identifies the seismic trace index of the first non-null horizon value in the data file. Please refer to important documentation for the EpiSeismic_LineGeometry2d XY column. The trace index is respective of the EpiSeisimc_LineGeometry2d and valid values are between zero and the LineGeometry2d's NumTraces-1 value. TraceStart and TraceEnd identify the data extent of the non-null horizon values. Zero is the minimum valid trace index value. TraceStart is always less than or equal to TraceEnd. TraceStart defaults to zero if not specified when doing table inserts.

PrimaryZPropertyName

The z-value property name. If the name is empty, it means this HorizonGrid1d does not have a z-value property. The primary z property identifies the property that contains the time or depth values that represent a surface. The other properties are usually attributes that are "draped" over the surface.

TraceEnd

Identifies the seismic trace index of the last non-null horizon value in the data file. The trace index is respective of the EpiSeisimc_LineGeometry2d and valid values are between zero and the LineGeometry2d's NumTraces-1 value. TraceStart and TraceEnd identify the data extent of the non-null horizon values. EpiSeismic_LineGeometry2d's NumTraces-1 represents the maximum valid trace index value. TraceEnd is always greater than or equal to TraceStart. TraceEnd defaults to NumTraces-1 if not specified when doing table inserts.

TraceDelta

Identifies the grid decimation factor. Normally this value will be one, which indicates a grid value can exist at each possible trace position along the 2D line. A value of two indicates a grid value can only exist at every other trace position along the 2D line. The higher the delta the fewer grid values can exist which means the data is more sparsely populated. TraceEnd defaults to one if not specified when doing table inserts.

OriginTypes

Identifies the data source, typically the LineGeometry2d and possibly the PostStack2d that were used for the interpretation.

PatchName

Name of the individual pieces that compose the whole. An empty string indicates the vendor store does not support patches.

PrimaryZPropertyKey

The z-value property key to the HorizonGrid1dProperty table. If the key is empty, it means this HorizonGrid1d does not have a z-value property. The primary z property identifies the property that contains the time or depth values that represent a surface. The other properties are usually attributes that are "draped" over the surface.

HorizonGrid1dSet

Identifies the associated horizon 1d grid collection.

LastModifiedDate

The date the data was last changed in the data store returned in the following format: "YYYY-MONTH-DAY HOUR:MINUTE:SECOND" For example, "1998-10-22 20:15:50"

OriginValues

Unique row identifier for the tables returned in the OriginTypes column. There is a one-to-one relationship between this column and the OriginTypes column.

HorizonGrid1dProperties

The properties associated to the HorizonGrid1d. The keys are Unique row identifiers for the HorizonGrid1dProperty table.

XY

The X and Y values associated to each one-dimensional grid value defined by the TraceStart, TraceEnd, and TraceDelta data extent. The length of this pointSeq will match the length of the HorizonGrid1dProperty's GridValues floatSeq column (i.e. ((TraceEnd - TraceStart) / TraceDelta) + 1). The first element of the pointSeq (i.e. TraceStart) is associated with the first element of the GridValues floatSeq. The last element of the pointSeq (i.e. TraceEnd) is associated with the last element of the GridValues floatSeq. 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. The XY surface coordinates are associated to the CoordinateSystem column. As a convenience, the Z component of the points are populated using the PrimaryZPropertyName grid values. If PrimaryZPropertyName is blank then the Z values will be set to zero.. The Z units will be in the CoordinateSystem's vertical units. The HorizonGrid1dProperty's GridValues can contain null values. The null values will be preserved if you issue a query without a preferred coordinate system or if the preferred coordinate system has the same Z units as the default CoordinateSystem. The null values will unfortunately be unit converted and these values will no longer match the HorizonGrid1dSet NullValue column if the preferred coordinate system has a different Z unit compared to the default CoordinateSystem. If this is a concern then the best approach would be to explicitly retrieve the HorizonGrid1dProperty's GridValues and manually perform the Z unit conversions so the null values can be ignored.