mirror of https://github.com/ecmwf/eccodes.git
64 lines
1.6 KiB
Modula-2
64 lines
1.6 KiB
Modula-2
# (C) Copyright 2005- ECMWF.
|
|
|
|
# START grib2::section
|
|
# SECTION 6, BIT-MAP SECTION
|
|
# Length of section in octets
|
|
# (nn)
|
|
position offsetSection6;
|
|
position offsetBSection6;
|
|
|
|
section_length[4] section6Length ;
|
|
meta section6 section_pointer(offsetSection6,section6Length,6);
|
|
|
|
# Number of section
|
|
unsigned[1] numberOfSection = 6:read_only;
|
|
|
|
# Bit-map indicator
|
|
codetable[1] bitMapIndicator ('6.0.table',masterDir,localDir) = 255 : dump;
|
|
|
|
#transient bitmapPresent=1;
|
|
meta geography.bitmapPresent g2bitmap_present(bitMapIndicator): dump;
|
|
transient missingValuesPresent = bitmapPresent : hidden, read_only;
|
|
|
|
# Bitmap...
|
|
if(bitMapIndicator == 0)
|
|
{
|
|
if(dataRepresentationTemplateNumber == 1)
|
|
{
|
|
if(matrixBitmapsPresent == 1)
|
|
{
|
|
meta primaryBitmap g2bitmap( tableReference,
|
|
missingValue,
|
|
offsetBSection6,
|
|
section6Length,
|
|
numberOfDataMatrices) : read_only;
|
|
}
|
|
else
|
|
{
|
|
meta geography.bitmap g2bitmap( tableReference,
|
|
missingValue,
|
|
offsetBSection6,
|
|
section6Length,
|
|
numberOfDataPoints) : read_only;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
meta geography.bitmap g2bitmap( tableReference,
|
|
missingValue,
|
|
offsetBSection6,
|
|
section6Length,
|
|
numberOfDataPoints) : read_only;
|
|
}
|
|
}
|
|
|
|
if(bitMapIndicator == 255)
|
|
{
|
|
# No bitmap is used but some complex packing schemes embed the missing values in the data section
|
|
if (dataRepresentationTemplateNumber == 2 || dataRepresentationTemplateNumber == 3) {
|
|
transient missingValuesPresent = (missingValueManagementUsed != 0) : read_only;
|
|
}
|
|
}
|
|
|
|
meta md5Section6 md5(offsetSection6,section6Length);
|