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Starting to implement Header information dictionaries

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cultpenguin
2005-04-20 08:33:53 +00:00
parent 75e154c001
commit bc8ec143ed
1 changed files with 27 additions and 11 deletions
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segypy.py
+27 -11
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@@ -48,16 +48,31 @@ l_char = struct.calcsize('c')
l_uchar = struct.calcsize('B')
l_float = struct.calcsize('f')
TraceHeaderPos={'TraceSequenceLine': 0}
TraceHeaderPos["TraceSequenceFile"]=4
#TraceSequenceLine=fread(segyid,1,'int32'); % 0#
#TraceSequenceFile=fread(segyid,1,'int32'); % 4
#FieldRecord=fread(segyid,1,'int32'); % 8
#TraceNumber=fread(segyid,1,'int32'); % 12
#EnergySourcePoint=fread(segyid,1,'int32'); % 16
#cdp=fread(segyid,1,'int32'); % 20
TraceHeaderPos["cdp"]=20
#cdpTrace=fread(segyid,1,'int32'); % 24
##############
# INIT
##############
# Initialize SEGY HEADER
SH_def = {"Job": {"pos": 3200,"type":"int32"}}
SH_def["Line"]= {"pos": 3204,"type":"int32"}
SH_def["Line"]= {"pos": 3208,"type":"int32"}
SH_def["DataTracePerEnsemble"]={"pos": 3212,"type":"int16"}
SH_def["AuxiliaryTracePerEnsemble"]={"pos": 3214,"type":"int16"}
SH_def["dt"]= {"pos": 3216,"type":"uint16"}
SH_def["dtOrig"]= {"pos": 3218,"type":"uint16"}
##############
# Initialize SEGY TRACE HEADER SPECIFICATION
STH_def = {"TraceSequenceLine": {"pos": 0,"type":"int32"}}
STH_def["TraceSequenceFile"]= {"pos": 4,"type":"int32"}
STH_def["FieldRecord"]= {"pos": 8, "type":"int32"}
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"}
# AND ADD THE REST....
##############
@@ -84,7 +99,8 @@ def getSegyTraceHeader(SH,THN='cdp',data='none'):
# MAKE SOME LOOKUP TABLE THAT HOLDS THE LOCATION OF HEADERS
# MAKE SOME LOOKUP TABLE THAT HOLDS THE LOCATION OF HEADERS
# THpos=TraceHeaderPos[THN]
THpos=STH_def[THN]["pos"]
ntraces=SH["ntraces"]
thv = zeros(ntraces)
for itrace in range(1,ntraces+1,1):