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https://github.com/wassname/segpy.git
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cultpenguin
@@ -34,7 +34,7 @@ else:
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# SOME GLOBAL PARAMETERS
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version=0.1
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verbose=12;
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verbose=1;
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#endian='>' # Big Endian
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#endian='<' # Little Endian
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@@ -57,10 +57,10 @@ l_float = struct.calcsize('f')
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SH_def = {"Job": {"pos": 3200,"type":"int32"}}
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SH_def["Line"]= {"pos": 3204,"type":"int32"}
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SH_def["Line"]= {"pos": 3208,"type":"int32"}
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SH_def["DataTracePerEnsemble"]={"pos": 3212,"type":"int16"}
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SH_def["DataTracePerEnsemble"]= {"pos": 3212,"type":"int16"}
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SH_def["AuxiliaryTracePerEnsemble"]={"pos": 3214,"type":"int16"}
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SH_def["dt"]= {"pos": 3216,"type":"uint16"}
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SH_def["dtOrig"]= {"pos": 3218,"type":"uint16"}
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SH_def["dt"]= {"pos": 3216,"type":"uint16"}
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SH_def["dtOrig"]= {"pos": 3218,"type":"uint16"}
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##############
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# Initialize SEGY TRACE HEADER SPECIFICATION
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@@ -69,9 +69,123 @@ STH_def["TraceSequenceFile"]= {"pos": 4,"type":"int32"}
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STH_def["FieldRecord"]= {"pos": 8, "type":"int32"}
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STH_def["TraceNumber"]= {"pos": 12,"type":"int32"}
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STH_def["EnergySourcePoint"]= {"pos": 16,"type":"int32"}
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STH_def["cdp"]= {"pos": 20,"type":"int32"}
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STH_def["cdpTrace"]= {"pos": 24,"type":"int32"}
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STH_def["cdp"]= {"pos": 20,"type":"int32"}
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STH_def["cdpTrace"]= {"pos": 24,"type":"int32"}
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# AND ADD THE REST....
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STH_def["TraceIdenitifactionCode"]={"pos":28 ,"type":"int16"} #'int16'); % 28
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STH_def["NSummedTraces"]={"pos":30 ,"type":"int16"} #'int16'); % 30
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STH_def["NStackedTraces"]={"pos":32 ,"type":"int16"} #'int16'); % 32
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STH_def["DataUse"]={"pos":34 ,"type":"int16"} #'int16'); % 34
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STH_def["offset"]={"pos":36 ,"type":"int32"} #'int32'); %36
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STH_def["ReceiverGroupElevation"]={"pos":40 ,"type":"int32"} #'int32'); %40
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STH_def["SourceSurfaceElevation"]={"pos":44 ,"type":"int32"} #'int32'); %44
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STH_def["SourceDepth"]={"pos":48 ,"type":"int32"} #'int32'); %48
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STH_def["ReceiverDatumElevation"]={"pos":52 ,"type":"int32"} #'int32'); %52
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STH_def["SourceDatumElevation"]={"pos":56 ,"type":"int32"} #'int32'); %56
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STH_def["SourceWaterDepth"]={"pos":60 ,"type":"int32"} #'int32'); %60
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STH_def["GroupWaterDepth"]={"pos":64 ,"type":"int32"} #'int32'); %64
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STH_def["ElevationScalar"]={"pos":68 ,"type":"int16"} #'int16'); %68
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STH_def["SourceGroupScalar"]={"pos":70 ,"type":"int16"} #'int16'); %70
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STH_def["SourceX"]={"pos":72 ,"type":"int32"} #'int32'); %72
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STH_def["SourceY"]={"pos":76 ,"type":"int32"} #'int32'); %76
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STH_def["GroupX"]={"pos":80 ,"type":"int32"} #'int32'); %80
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STH_def["GroupY"]={"pos":84 ,"type":"int32"} #'int32'); %84
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STH_def["CoordinateUnits"]={"pos":88 ,"type":"int16"} #'int16'); %88
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STH_def["WeatheringVelocity"]={"pos":90 ,"type":"int16"} #'int16'); %90
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STH_def["SubWeatheringVelocity"]={"pos":92 ,"type":"int16"} #'int16'); %92
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STH_def["SourceUpholeTime"]={"pos":94 ,"type":"int16"} #'int16'); %94
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STH_def["GroupUpholeTime"]={"pos":96 ,"type":"int16"} #'int16'); %96
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STH_def["SourceStaticCorrection"]={"pos":98 ,"type":"int16"} #'int16'); %98
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STH_def["GroupStaticCorrection"]={"pos":100 ,"type":"int16"} #'int16'); %100
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STH_def["TotalStaticApplied"]={"pos":102 ,"type":"int16"} #'int16'); %102
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STH_def["LagTimeA"]={"pos":104 ,"type":"int16"} #'int16'); %104
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STH_def["LagTimeB"]={"pos":106 ,"type":"int16"} #'int16'); %106
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STH_def["DelayRecordingTime"]={"pos":108 ,"type":"int16"} #'int16'); %108
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STH_def["MuteTimeStart"]={"pos":110 ,"type":"int16"} #'int16'); %110
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STH_def["MuteTimeEND"]={"pos":112 ,"type":"int16"} #'int16'); %112
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STH_def["ns"]={"pos":114 ,"type":"uint16"} #'uint16'); %114
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STH_def["dt"]={"pos":116 ,"type":"uint16"} #'uint16'); %116
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STH_def["GainType"]={"pos":119 ,"type":"int16"} #'int16'); %118
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STH_def["InstrumentGainConstant"]={"pos":120 ,"type":"int16"} #'int16'); %120
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STH_def["InstrumentInitialGain"]={"pos":122 ,"type":"int16"} #'int16'); %%122
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STH_def["Correlated"]={"pos":124 ,"type":"int16"} #'int16'); %124
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STH_def["SweepFrequenceStart"]={"pos":126 ,"type":"int16"} #'int16'); %126
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STH_def["SweepFrequenceEnd"]={"pos":128 ,"type":"int16"} #'int16'); %128
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STH_def["SweepLength"]={"pos":130 ,"type":"int16"} #'int16'); %130
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STH_def["SweepType"]={"pos":132 ,"type":"int16"} #'int16'); %132
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STH_def["SweepTraceTaperLengthStart"]={"pos":134 ,"type":"int16"} #'int16'); %134
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STH_def["SweepTraceTaperLengthEnd"]={"pos":136 ,"type":"int16"} #'int16'); %136
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STH_def["TaperType"]={"pos":138 ,"type":"int16"} #'int16'); %138
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STH_def["AliasFilterFrequency"]={"pos":140 ,"type":"int16"} #'int16'); %140
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STH_def["AliasFilterSlope"]={"pos":142 ,"type":"int16"} #'int16'); %142
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STH_def["NotchFilterFrequency"]={"pos":144 ,"type":"int16"} #'int16'); %144
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STH_def["NotchFilterSlope"]={"pos":146 ,"type":"int16"} #'int16'); %146
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STH_def["LowCutFrequency"]={"pos":148 ,"type":"int16"} #'int16'); %148
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STH_def["HighCutFrequency"]={"pos":150 ,"type":"int16"} #'int16'); %150
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STH_def["LowCutSlope"]={"pos":152 ,"type":"int16"} #'int16'); %152
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STH_def["HighCutSlope"]={"pos":154 ,"type":"int16"} #'int16'); %154
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STH_def["YearDataRecorded"]={"pos":156 ,"type":"int16"} #'int16'); %156
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STH_def["DayOfYear"]={"pos":158 ,"type":"int16"} #'int16'); %158
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STH_def["HourOfDay"]={"pos":160 ,"type":"int16"} #'int16'); %160
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STH_def["MinuteOfHour"]={"pos":162 ,"type":"int16"} #'int16'); %162
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STH_def["SecondOfMinute"]={"pos":164 ,"type":"int16"} #'int16'); %164
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STH_def["TimeBaseCode"]={"pos":166 ,"type":"int16"} #'int16'); %166
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STH_def["TimeBaseCode"]["descr"]={
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1: "Local",
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2: "GMT",
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3:"Other",
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4:"UTC"}
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STH_def["TraceWeightningFactor"]={"pos":168 ,"type":"int16"} #'int16'); %170
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STH_def["GeophoneGroupNumberRoll1"]={"pos":170 ,"type":"int16"} #'int16'); %172
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STH_def["GeophoneGroupNumberFirstTraceOrigField"]={"pos":172 ,"type":"int16"} #'int16'); %174
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STH_def["GeophoneGroupNumberLastTraceOrigField"]={"pos":174 ,"type":"int16"} #'int16'); %176
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STH_def["GapSize"]={"pos":176 ,"type":"int16"} #'int16'); %178
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STH_def["OverTravel"]={"pos":178 ,"type":"int16"} #'int16'); %178
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STH_def["cdpX"]={"pos":180 ,"type":"int32"} #'int32'); %180
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STH_def["cdpY"]={"pos":184 ,"type":"int32"} #'int32'); %184
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STH_def["Inline3D"]={"pos":188 ,"type":"int32"} #'int32'); %188
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STH_def["Crossline3D"]={"pos":192 ,"type":"int32"} #'int32'); %192
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STH_def["ShotPoint"]={"pos":192 ,"type":"int32"} #'int32'); %196
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STH_def["ShotPointScalar"]={"pos":200 ,"type":"int16"} #'int16'); %200
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STH_def["TraceValueMeasurementUnit"]={"pos":202 ,"type":"int16"} #'int16'); %202
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STH_def["TraceValueMeasurementUnit"]["descr"] = {
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-1: "Other",
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0: "Unknown",
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1: "Pascal (Pa)",
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2: "Volts (V)",
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3: "Millivolts (v)",
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4: "Amperes (A)",
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5: "Meters (m)",
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6: "Meters Per Second (m/s)",
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7: "Meters Per Second squared (m/&s2)Other",
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8: "Newton (N)",
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9: "Watt (W)"}
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#if SegyTraceHeader.TraceValueMeasurementUnit==-1, #SegyTraceHeader.TraceValueMeasurementUnitText='Other';
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#elseif SegyTraceHeader.TraceValueMeasurementUnit==0, #SegyTraceHeader.TraceValueMeasurementUnitText='Unknown';
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#elseif SegyTraceHeader.TraceValueMeasurementUnit==1, #SegyTraceHeader.TraceValueMeasurementUnitText='Pascal (Pa)';
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#elseif SegyTraceHeader.TraceValueMeasurementUnit==2, #SegyTraceHeader.TraceValueMeasurementUnitText='Volts (v)';
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#elseif SegyTraceHeader.TraceValueMeasurementUnit==3, #SegyTraceHeader.TraceValueMeasurementUnitText='Millivolts (v)';
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#elseif SegyTraceHeader.TraceValueMeasurementUnit==4, #SegyTraceHeader.TraceValueMeasurementUnitText='Amperes (A)';
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#elseif SegyTraceHeader.TraceValueMeasurementUnit==5, #SegyTraceHeader.TraceValueMeasurementUnitText='Meters (m)';
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#elseif SegyTraceHeader.TraceValueMeasurementUnit==6, #SegyTraceHeader.TraceValueMeasurementUnitText='Meters Per Second (m/s)';
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#elseif SegyTraceHeader.TraceValueMeasurementUnit==7, #SegyTraceHeader.TraceValueMeasurementUnitText='Meters Per Second squared (m/&s2)Other';
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#elseif SegyTraceHeader.TraceValueMeasurementUnit==8, #SegyTraceHeader.TraceValueMeasurementUnitText='Newton (N)';
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#elseif SegyTraceHeader.TraceValueMeasurementUnit==9, #SegyTraceHeader.TraceValueMeasurementUnitText='Watt (W)';
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#else SegyTraceHeader.TraceValueMeasurementUnitText='Undefined'; end
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STH_def["TransductionConstantMantissa"]={"pos":204 ,"type":"int32"} #'int32'); %204
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STH_def["TransductionConstantPower"]={"pos":208 ,"type":"int16"} #'int16'); %208
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STH_def["TransductionUnit"]={"pos":210 ,"type":"int16"} #'int16'); %210
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STH_def["TraceIdentifier"]={"pos":212 ,"type":"int16"} #'int16'); %212
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STH_def["ScalarTraceHeader"]={"pos":214 ,"type":"int16"} #'int16'); %214
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STH_def["SourceType"]={"pos":216 ,"type":"int16"} #'int16'); %216
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STH_def["SourceEnergyDirectionMantissa"]={"pos":218 ,"type":"int32"} #'int32'); %218
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STH_def["SourceEnergyDirectionExponent"]={"pos":222 ,"type":"int16"} #'int16'); %222
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STH_def["SourceMeasurementMantissa"]={"pos":224 ,"type":"int32"} #'int32'); %224
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STH_def["SourceMeasurementExponent"]={"pos":228 ,"type":"int16"} #'int16'); %228
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STH_def["SourceMeasurementUnit"]={"pos":230 ,"type":"int16"} #'int16'); %230
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STH_def["UnassignedInt1"]={"pos":232 ,"type":"int32"} #'int32'); %232
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STH_def["UnassignedInt2"]={"pos":236 ,"type":"int32"} #'int32'); %236
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@@ -101,6 +215,7 @@ def getSegyTraceHeader(SH,THN='cdp',data='none'):
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# MAKE SOME LOOKUP TABLE THAT HOLDS THE LOCATION OF HEADERS
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# THpos=TraceHeaderPos[THN]
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THpos=STH_def[THN]["pos"]
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THformat=STH_def[THN]["type"]
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ntraces=SH["ntraces"]
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thv = zeros(ntraces)
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for itrace in range(1,ntraces+1,1):
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@@ -110,7 +225,7 @@ def getSegyTraceHeader(SH,THN='cdp',data='none'):
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txt="Reading trace header ",itrace," of ",ntraces,pos
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printverbose(txt,10);
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thv[itrace-1],index = getValue(data,pos,'l','>',1)
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thv[itrace-1],index = getValue(data,pos,THformat,'>',1)
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txt=THN,"=",thv[itrace-1]
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printverbose(txt,5);
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@@ -300,10 +415,10 @@ def getValue(data,index,ctype='l',endian='>',number=1):
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"""
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getValue(data,index,ctype,endian,number)
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"""
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if (ctype=='l')|(ctype=='long'):
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if (ctype=='l')|(ctype=='long')|(ctype=='int32'):
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size=l_long
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ctype='l'
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elif (ctype=='L')|(ctype=='ulong'):
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elif (ctype=='L')|(ctype=='ulong')|(ctype=='uint32'):
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size=l_ulong
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ctype='L'
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elif (ctype=='h')|(ctype=='short')|(ctype=='int16'):
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