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This commit is contained in:
Robert Smallshire
2011-10-18 18:44:58 +02:00
parent a7842ab28b
commit 0615ce8fc9
1 changed files with 16 additions and 16 deletions
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segypy.py
+16 -16
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@@ -1,16 +1,16 @@
"""
A python module for reading/writing/manipuating
A python module for reading/writing/manipulating
SEG-Y formatted filed
segy.readSegy : Read SEGY file
segy.getSegyHeader : Get SEGY header
segy.getSegyTraceHeader : Get SEGY Trace header
segy.getAllSegyTraceHeaders : Get all SEGY Trace headers
segy.getSegyTrace : Get SEGY Trace heder and trace data for one trace
segy.getSegyTrace : Get SEGY Trace header and trace data for one trace
segy.writeSegy : Write a data to a SEGY file
segy.writeSegyStructure : Writes a segypy data structure to a SEGY file
segy.writeSegyStructure : Writes a segpy data structure to a SEGY file
segy.getValue : Get a value from a binary string
segy.ibm2ieee : Convert IBM floats to IEEE
@@ -19,17 +19,17 @@ segy.version : The version of SegyPY
segy.verbose : Amount of verbose information to the screen
"""
#
# segypy : A Python module for reading and writing SEG-Y formatted data
# segpy : A Python module for reading and writing SEG-Y formatted data
#
# Forked by Robert Smallshire from the original segypy by
#
# (C) Thomas Mejer Hansen, 2005-2006
#
# contributions from
# - Pete Forman
#
# modified by Andrew Squelch 2007 : sub-version 0.3.1
# with contributions from Pete Forman and Andrew Squelch 2007
import struct, sys # modified by A Squelch
import sys
import struct
from numpy import transpose
from numpy import resize
@@ -115,7 +115,7 @@ SH_def["SweepFrequencyEnd"]={"pos": 3234,"type":"int16","def":0}
SH_def["SweepLength"]={"pos": 3236,"type":"int16","def":0}
SH_def["SweepType"]={"pos": 3238,"type":"int16","def":0}
SH_def["SweepChannel"]={"pos": 3240,"type":"int16","def":0}
SH_def["SweepTaperlengthStart"]={"pos": 3242,"type":"int16","def":0}
SH_def["SweepTaperLengthStart"]={"pos": 3242,"type":"int16","def":0}
SH_def["SweepTaperLengthEnd"]={"pos": 3244,"type":"int16","def":0}
SH_def["TaperType"]={"pos": 3246,"type":"int16","def":0}
SH_def["CorrelatedDataTraces"]={"pos": 3248,"type":"int16","def":0}
@@ -139,8 +139,8 @@ STH_def["TraceNumber"]= {"pos": 12,"type":"int32"}
STH_def["EnergySourcePoint"]= {"pos": 16,"type":"int32"}
STH_def["cdp"]= {"pos": 20,"type":"int32"}
STH_def["cdpTrace"]= {"pos": 24,"type":"int32"}
STH_def["TraceIdenitifactionCode"]={"pos":28 ,"type":"uint16"} #'int16'); % 28
STH_def["TraceIdenitifactionCode"]["descr"]={0:{
STH_def["TraceIdentificationCode"]={"pos":28 ,"type":"uint16"} #'int16'); % 28
STH_def["TraceIdentificationCode"]["descr"]={0:{
1: "Seismic data",
2: "Dead",
3: "Dummy",
@@ -149,7 +149,7 @@ STH_def["TraceIdenitifactionCode"]["descr"]={0:{
6: "Sweep",
7: "Timing",
8: "Water Break"}}
STH_def["TraceIdenitifactionCode"]["descr"][1]={
STH_def["TraceIdentificationCode"]["descr"][1]={
-1: "Other",
0: "Unknown",
1: "Seismic data",
@@ -275,7 +275,7 @@ STH_def["TimeBaseCode"]["descr"][1]={
2: "GMT",
3: "Other",
4: "UTC"}
STH_def["TraceWeightningFactor"]={"pos":168 ,"type":"int16"} #'int16'); %170
STH_def["TraceWeightingFactor"]={"pos":168 ,"type":"int16"} #'int16'); %170
STH_def["GeophoneGroupNumberRoll1"]={"pos":170 ,"type":"int16"} #'int16'); %172
STH_def["GeophoneGroupNumberFirstTraceOrigField"]={"pos":172 ,"type":"int16"} #'int16'); %174
STH_def["GeophoneGroupNumberLastTraceOrigField"]={"pos":174 ,"type":"int16"} #'int16'); %176
@@ -565,11 +565,11 @@ def readSegyData(data,SH,nd,bps,index,endian='>'): # added by A Squelch
called from other external functions - by A Squelch.
"""
# Calulate number of dummy samples needed to account for Trace Headers
# Calculate number of dummy samples needed to account for Trace Headers
ndummy_samples=240/bps
printverbose("readSegyData : ndummy_samples="+str(ndummy_samples),6)
# READ ALL SEGY TRACE HEADRES
# READ ALL SEGY TRACE HEADERS
STH = getAllSegyTraceHeaders(SH,data)
printverbose("readSegyData : Reading segy data",1)