NAME
dds_disco - Rosetta Stone, Data Dictionary System
SYNOPSIS
Data Dictionary System, Rosetta Stone for standard formats
DESCRIPTION
Rosetta stone for field names within standard formats.
Rosetta provides a one line summary for default mapping
definitions. The Rosetta does NOT indicate other important
details; the type, precision, and dimension of fields within
formats is described elsewhere.
tab(|); lB lB lB lB lB lB.
SEGY|Disco|USP|ProMax|LandMark|Western
FLAGS|FLAGS|FLAGS|FLAGS|FLAGS|FLAGS
|LASTTR|||LandMark|Western |TYPE|||LandMark|Western
TrcIdCode|TRACEID||TRC_TYPE|LandMark|Western
|THDRID|TrHdID||LandMark|Western
DataUse|DATAUSE|||LandMark|Western
|RCVRCO|RcComp||LandMark|Western
|SHOTCO|SrComp||LandMark|Western
|TIELIN|TiLiIx||LandMark|Western
|LASTFA|LRcCDP||LandMark|Western
VertStack|VSTACK|||LandMark|Western
HorzStack|FOLD|FoldNm|TR_FOLD|LandMark|Western
INDEX|INDEX|INDEX|INDEX|INDEX|INDEX
FieldRecNum|SHOT|PrRcNm||LandMark|Western
ShotNum|SHOT|||LandMark|Western
FlReFN|FFID|FlReFN|FFID|LandMark|Western
RecNum|RECNUM|RecNum||LandMark|Western SrcPnt|CDP-
STAT|SrcPnt|CDP_SLOC|LandMark|Western SoPtNm|SHT-
STAT|SoPtNm|SOU_SLOC|LandMark|Western
|FLSTNM|FlStNm||LandMark|Western
SrcPtNum|ESPNUM|ESPNum||LandMark|Western
SrcPtNum|ESPNUM|SoPtNm|SOURCE|LandMark|Western
SrcPtNum|ESPNUM|SoPtNm|SIN|LandMark|Western
SrcLoc|SRCLOC|SrcLoc||LandMark|Western RecInd|REC-
STAT|RecInd|REC_SLOC|LandMark|Western
CdpNum|CDP|DphInd|CDP|LandMark|Western
LinInd|CDPLBLS|LinInd||LandMark|Western
CdpTrcNum|SEQNO|TrcNum|SEQNO|LandMark|Western
FieldTrcNum|CHAN|PrTrNm|CHAN|LandMark|Western
LineTrcNum|TRCNTR|InTrCn||LandMark|Western
LineTrcNum|LINETRC||TRACENO|LandMark|Western
ReelTrcNum|REELTRC|||LandMark|Western
SPACE|SPACE|SPACE|SPACE|SPACE|SPACE SrcX|SHT-
X|SrPtXC|SOU_X|LandMark|Western SrcY|SHT-
Y|SrPtYC|SOU_Y|LandMark|Western GrpX|REC-
X|RcPtXC|REC_X|LandMark|Western GrpY|REC-
Y|RcPtYC|REC_Y|LandMark|Western SrRcMX|MID-
X|SrRcMX||LandMark|Western SrRcMY|MID-
Y|SrRcMY||LandMark|Western CDPBCX|CDP-
X|CDPBCX||LandMark|Western CDPBCY|CDP-
Y|CDPBCY||LandMark|Western |CDPRPO|DPOPer||LandMark|Western
|PERSPO|PerSPO||LandMark|Western
|NLINOF|InlSPO||LandMark|Western
SrRcAz|SRAZMTH|SrRcAz||LandMark|Western
|CDPLAT|DpPtLt||LandMark|Western
|CDPLON|DpPtLn||LandMark|Western
|SHTLAT|SrPtLt||LandMark|Western
|SHTLON|SrPtLn||LandMark|Western
SrcDepth|SHTDEP|ShtDep|DEPTH|LandMark|Western
SrcDepth|SDEPTH|ShtDep|DEPTH|LandMark|Western
|CDEPTH|CabDep||LandMark|Western
|WDEPTH|WDepDP||LandMark|Western
WatDepthSrc|WDEPTHSO||SOU_H2OD|LandMark|Western
WatDepthGrp|WDEPTHRC||REC_H2OD|LandMark|Western
SrcElev|SELEV|SrPtEl|SOU_ELEV|LandMark|Western
GrpElev|RELEV|GrpElv|REC_ELEV|LandMark|Western
DePtEl|CELEV|DePtEl||LandMark|Western
DstSgn|SOFFSET|DstSgn|OFFSET|LandMark|Western
DstUsg|OFFSET|DstUsg|AOFFSET|LandMark|Western
GrpDatum|RDATUM|RfSrEl||LandMark|Western
RfSrEl||RfSrEl||LandMark|Western
SrcDatum|SDATUM|||LandMark|Western
FlDtEl|FLDTEL|FlDtEl||LandMark|Western ElevScaler|ED-
SCAL|||LandMark|Western XYScaler|CO-SCAL|||LandMark|Western
XYUnits|COORUNIT||IUNITS|LandMark|Western
STATICS|STATICS|STATICS|STATICS|STATICS|STATICS
UpholeTmSrc|UPHOLE|UphlTm|UPHOLE|LandMark|Western
UpholeTmGrp|RCUPHOLE|||LandMark|Western
|STATIC|StaCor|TOT_STAT|LandMark|Western
TotalStatic|STAPPLY|StaCor|TOT_STAT|LandMark|Western |SHT-
PREP|PREPIn||LandMark|Western |SHT-
UN|InStUn||LandMark|Western |SHT-
SHFT|InStAp||LandMark|Western
SrcStatic|SHSTAT|InStAp|SOU_STAT|LandMark|Western |REC-
PREP|PREPRc||LandMark|Western |REC-
UN|RcStUn||LandMark|Western |REC-
SHFT|RcStAp||LandMark|Western
GrpStatic|RCSTAT|RcStAp|REC_STAT|LandMark|Western
CdpStatic|TOT-SHFT|ToStAp||LandMark|Western
|TTIMAA|ToTmAA||LandMark|Western |TOT-
UN|ToStUn||LandMark|Western |TTIMAU|ToTmAU||LandMark|Western
|DSHIFT|DatShf||LandMark|Western |SHT-
FDS|SrStat||LandMark|Western |REC-
FDS|RcStat||LandMark|Western
|TIMVEL|TVPair||LandMark|Western
|TVEL|VPick1||LandMark|Western
|VFDFLG|VPick2||LandMark|Western
RefStatSrc|RSTATSRC|||LandMark|Western
RefStatGrp|RSTATGRP|||LandMark|Western
SURFACE|SURFACE|SURFACE|SURFACE|SURFACE|SURFACE
|REDVEL|RedVel||LandMark|Western
|REDTIM|RedTim||LandMark|Western
WeathVel|WVEL|||LandMark|Western
SubWeathVel|SUBWVEL|||LandMark|Western
LagTmBreak|LAGTIMEA|||LandMark|Western
LagTmSrc|LAGTIMEB|||LandMark|Western
LagTmSmpOne|DELAY|||LandMark|Western
MuteStart|MUTESTRT||TLIVE_S|LandMark|Western
MuteEnd|MUTEEND||TFULL_S|LandMark|Western
VIBRO|VIBRO|VIBRO|VIBRO|VIBRO|VIBRO
CorrFlag|CORRFLAG|||LandMark|Western
SwpFreqStart|SWEEPSRT|||LandMark|Western
SwpFreqEnd|SWEEPEND|||LandMark|Western
SwpLength|SWEEPLNG|||LandMark|Western
SwpType|SWEEPTYP|||LandMark|Western
SwpTprStart|SWEEPSTP|||LandMark|Western
SwpTprEnd|SWEEPETP|||LandMark|Western
SwpTprType|TAPERTYP|||LandMark|Western
FIELD|FIELD|FIELD|FIELD|FIELD|FIELD
GainType|GAINTYPE||IGAINX|LandMark|Western
GainConst|INGCONST||PREAMP|LandMark|Western
GainInit|INITGAIN||EARLYG|LandMark|Western
TrcNumSmp|NSAMPLES||NUMSMP|LandMark|Western
TrcSmpInt|SRATE||SAMPRAT|LandMark|Western
|SGRNUM|SGRNum||LandMark|Western
|SGRAMP|SGRAmp||LandMark|Western
|SGRDAT|SGRDat||LandMark|Western
|MULSKW|MulSkw||LandMark|Western
AntiAliasFreq|ALIASFIL||AAXFILT|LandMark|Western
AntiAliasSlope|ALIASLOP||AAXSLOP|LandMark|Western
NotchFreq|NOTCHFIL||FREQXN|LandMark|Western
NotchSlope|NOTCHSLP||FXNSLOP|LandMark|Western
LowCutFreq|LOWCUT||FREQXL|LandMark|Western
HighCutFreq|HIGHCUT||FREQXH|LandMark|Western
LowCutSlope|LOWCSLOP||FXLSLOP|LandMark|Western
HighCutSlope|HICSLOP||FXHSLOP|LandMark|Western
DateYear|YEAR||IDATREC|LandMark|Western
DateDay|DAY|||LandMark|Western
DateHour|HOUR|||LandMark|Western
DateMin|MINUTE|||LandMark|Western
DateSec|SECOND|||LandMark|Western
DateType|TIMEBASE|||LandMark|Western
TrcWeight|TRWEIGHT|||LandMark|Western
RollSwtch1|RSTASWP1|||LandMark|Western
RollTrace1|RSTATRC1|||LandMark|Western
RollTraceN|RSTATRCN|||LandMark|Western
RollGapSize|GAPSIZE|||LandMark|Western
OverTravel|OVERTRVL|||LandMark|Western
Samples|Samples|Samples|Samples|LandMark|Western
SEGY|Disco|USP|ProMax|LandMark|Western
EVOLUTION
These translations reflect current conventions as understood
by the author as of July of 1994. Changes have already been
suggested as follows.
tab(|); lB lB lB lB lB lB.
SEGY|Disco|USP|ProMax|LandMark|Western
CHANGE|CHANGE|CHANGE|CHANGE|CHANGE|CHANGE
LineTrcNum|LINETRC|InTrCn||LandMark|Western
FieldRecNum|FFID|PrRcNm||LandMark|Western
FlReFN|SHOT|FlReFN||LandMark|Western SoPtNm|SHT-
STAT|SrcLoc||LandMark|Western
SrcPtNum|ESPNUM|SoPtNm|SOURCE|LandMark|Western
DELETE|DELETE|DELETE|DELETE|DELETE|DELETE
|TRCNTR|||LandMark|Western RfSrEl||||LandMark|Western
SrcLoc|SRCLOC|||LandMark|Western
An alternate font is used in the Rosetta to denote problems.
The segy format reserves 60 bytes for spare trace header
fields. Usage of these fields varies widely within the
industry. The Rosetta denotes these fields with an alter-
nate font, because they may not exist within a particular
segy dataset.
Alternate fonts also denote ambiguous fields in other for-
mats. They contain the same information as another field in
the same format.
BUGS
Field mapping is limited and buggy in the current version of
DDS. Priorities have not allowed the initial version of
this code to be cleaned up, much less enhanced.
Only default mapping is effective on vector fields (array
size > 1). Default mapping is applied, when the input and
output fields have precisely the same name. If a mapping
definition exists for an output field, a scalar value is
computed and assigned to the first element. Subsequent
vector elements are zeroed. This is not a problem for most
header fields, because they are scalars (size == 1).
The "Samples" field is a vector associated with trace data.
It is treated like any other header field. Precisely the
same name is used in all DDS types that contain trace data.
Map definitions are carefully avoided for the Samples field.
Two additional vector fields exist in the usp format, TiLiIx
and TVPair (Tie Line Indicator and Time Value pairs). The
Disco header preserves this information using the names
"TIMVEL" and "TIELIN". Default mapping is achieved by
creating alias names in the usp format that correspond to
the Disco names. This kludge is not listed in the Rosetta.
SEE ALSO
tab(|); lB l. dds(1)|overview dds_user(1)|user guide
dds_map(1)|map expressions dds_expert(1)|symbolic names
dds_format(1)|generic format dds_disco(1)|Disco format
dds_usp(1)|Disco format dds_segy(1)|Disco format
dds_rosetta(1)|Rosetta Stone, "Standard" formats
cdds_api(3)|"C" Application Program Interface
fdds_api(3f)|Fortran Application Program Interface
AUTHOR
R. L. Selzler, APR, Tulsa
COPYRIGHT
copyright 2001, Amoco Production Company
All Rights Reserved
an affiliate of BP America Inc.
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