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All the input data files needed to test the utilities
are in the subdirectory testfiles/.
Instructions on testing the HDF utility programs:
hdf24to8 -- converts 24-bit raster images to hdf 8-bit images
Copy head.r24.Z from the testfiles/ directory to the util/ directory.
Type: uncompress head.r24.Z
Execute the following in the util/ directory:
cp testfiles/head.r24.Z .
uncompress head.r24.Z
./hdf24to8 head.r24 head8.hdf
View head8.hdf using any visualization tool available (mosaic, collage, etc).
Delete head.r24 and head8.hdf when you are done.
rm head.r24 head8.hdf
hdfed -- hdf file editor
Copy the file storm110.hdf from the testfiles/ directory to the
util/ directory.
Execute the following in the util/ directory:
cp testfiles/storm110.hdf .
./hdfed storm110.hdf
Running interactively, type the following commands:
info -all
prev tag = 300
info -long
dump -short
The latter two commands should result in the following responses:
(6) Image Dimensions : (Tag 300)
Ref: 110, Offset: 3459, Length: 20 (bytes)
0: 0 57 0 57 106 110
12: 1 0 0 0
Type help and experiment. Most of the information can be verified
with hdfls. Be sure to type 'close' then 'quit' when you are finished
and delete storm110.hdf when you are done.
rm storm110.hdf
Copy ntcheck.hdf from the testfiles/ directory to the util/ directory.
Execute the following in the util/ directory:
cp testfiles/ntcheck.hdf .
./hdfed ntcheck.hdf
ntcheck.hdf will be used as an input file to test the dump function.
The command:
dump -help
displays the list of formats supported by hdfed.
Commands:
prev tag=<tag> ref=<ref>
and
next tag=<rag> ref=<ref>
move you back and forth among the objects.
info -all
gives the tag and reference numbers for each object.
Look at the data in various objects and verify the data type.
For example:
next tag = 702 ref = 2
You will be past this data object and will receive the message
"Reached end of file. Not moved." Repeat the command using prev
instead of next.
dump -float
The first 5 lines of output should read as follows:
0: 0.000000e+00 1.000000e+00 2.000000e+00 3.000000e+00
16: 4.000000e+00 5.000000e+00 6.000000e+00 7.000000e+00
32: 8.000000e+00 9.000000e+00 4.000000e+01 4.100000e+01
48: 4.200000e+01 4.300000e+01 4.400000e+01 4.500000e+01
64: 4.600000e+01 4.700000e+01 4.800000e+01 4.900000e+01
next tag = 702 ref = 6
dump -short
The first 5 lines of output should read as follows:
0: 0 1 2 3 4 5
12: 6 7 8 9 6000 6001
24: 6002 6003 6004 6005 6006 6007
36: 6008 6009 12000 12001 12002 12003
48: 12004 12005 12006 12007 12008 12009
The following is a cross reference of ref number and data type if you
want to experiment:
ref number type
2 DFNT_FLOAT32
3 DFNT_INT8
4 DFNT_UINT8
5 DFNT_INT16
6 DFNT_UINT16
7 DFNT_INT32
8 DFNT_UINT32
Type 'close' and 'quit' when you are finished.
Delete ntcheck.hdf.
rm ntcheck.hdf
ristosds -- converts a series raster image hdf files into a
single 3D sds hdf file.
Copy the three HDF files storm110.hdf, storm120.hdf, and
storm130.hdf from the testfiles/ directory.
Execute the following in the util/ directory:
cp testfiles/storm110.hdf testfiles/storm120.hdf testfiles/storm130.hdf .
./ristosds storm*.hdf -o storm.hdf
Compare storm110.hdf with storm.hdf using the following commands:
hdfed storm.hdf
prev tag = 702
info -long
(*) dump -length 20 -byte
close
open storm110.hdf
prev tag = 302
info -long
(**) dump -length 20 -byte
close
quit
* In storm.hdf tag 702's element should be 9747 bytes.
** In storm110.hdf tag 302's element should be 1/3 of
9747, which is 3249. (It is a 57x57 image.)
Compare the first few numbers in storm110's image
with the first few numbers in storm.hdf's SDS.
They should be the same.
Remove storm*.hdf from the util/ directory before continuing.
rm storm*.hdf
hdfpack -- compacts an hdf file
Copy the file test.hdf from the testfiles/ directory.
Execute the following in the util/ directory:
cp testfiles/test.hdf .
./hdfpack test.hdf test.pck
./hdfpack -b test.hdf test.blk
Use hdfls to get a listing of test.hdf and test.pck. The only
difference between the 2 listings should be that test.pck
shouldn't have any special elements and it also shouldn't
have any "Linked Block Indicators."
./hdfls test.hdf
./hdfls test.pck
The file sizes should be as follows:
test.hdf - 11795
test.pck - 6747
test.blk - 7599
Depending on the platform, the file sizes may be one byte off
for test.pck and test.blk.
Remove test.cdf, test.blk, and test.pck.
rm test.hdf test.blk test.pck
hdftopal/paltohdf -- converts between a raw palette and an hdf
Copy the file palette.raw from the testfiles/ directory.
Execute the following in the util/ directory:
cp testfiles/palette.raw .
./paltohdf palette.raw palette.hdf
./hdftopal palette.hdf palette.raw.new
Use hdfls with the '-l' option to examine palette.hdf.
It should have an 'Image Palette-8' and an 'Image Palette,'
both with length 768 bytes. They should also have the same
reference number.
Use the Unix utility 'cmp' or something similar to do a byte-for-byte
comparison of palette.raw and palette.raw.new. They should be
identical.
cmp palette.raw palette.raw.new
Remove palette.*.
rm palette.*
r8tohdf/hdftor8 -- converts between 8-bit raster images and hdf files
Copy the files storm*.raw and palette.raw from the testfiles/ directory.
Execute the following in the util/ directory:
cp testfiles/storm*.raw .
./r8tohdf 57 57 storm.hdf storm*.raw
./r8tohdf 57 57 storm.hdf -p palette.raw -i storm110.raw
./hdftor8 storm.hdf
Use hdfls with the '-l' option to examine storm.hdf. It should
contain five raster image sets, one of which will be compressed
under IMCOMP compression. (If you do not put the '-p' in the
second r8tohdf command above, you should get an error message.)
The non-compressed raster images should be the same length as
the raw raster files. The compressed will be about 25% of that
size.
Use the Unix utility 'cmp' or something similar to do byte-for-byte
comparisons on the raw raster files produced by hdftor8:
cmp img001-057.057 storm110.raw
cmp img002-057.057 storm120.raw
cmp img003-057.057 storm130.raw
cmp img004-057.057 storm140.raw
There should be one more img* file than you had at the start. One of the
img files may not compare exactly with any one of the raw rasters, and the
rest will compare with one of the other raw rasters. There is no guarantee
about the order of the produced raw rasters, but it is likely they will be
produced in the order in which they went into the file, which would be
increasing numerical order, with the compressed image last.
Remove storm* and img* when you are done.
rm storm* img*
hdfcomp -- re-compress 8-bit raster hdf file
Copy the files storm*.hdf from the testfiles/ directory.
Execute:
cp testfiles/storm*.hdf .
./hdfcomp allstorms.hdf storm*.hdf
./hdfcomp allcomp.hdf -c storm*.hdf
Use hdfls with the '-l' option to examine the two HDF files. The first,
allstorms.hdf, should simply hold the raster together in one file,
with no compression. You can use hdfls to check the original files.
The second file, allcomp.hdf, should hold all the rasters in a
compress format. Run-Length Encoding (RLE) compression will result
in modest savings - about 10% to 15% for these files.
Remove allstorms.hdf and allcomp.hdf.
rm storm*.hdf all*.hdf
jpeg2hdf/hdf2jpeg
Copy the file jpeg_img.jpg from the testfiles/ directory.
Execute:
cp testfiles/jpeg_img.jpg .
./jpeg2hdf jpeg_img.jpg jpeg.hdf
./hdf2jpeg jpeg.hdf jpeg2.jpg
Use hdfls with the '-l' option to examine the HDF file. It should
contain one raster image set, which will be compressed with JPEG
compression. The JPEG compressed image will be 2922 bytes in size.
Use the Unix utility 'cmp' or something similar to do byte-for-byte
comparisons on the produced raw raster files by hdf2jpeg. The
initial jpeg_img.jpg file should be an exact match for the new
jpeg2.jpg file.
cmp jpeg_img.jpg jpeg2.jpg
Remove jpeg.hdf, jpeg_img.jpg, and jpeg2.jpg.
rm jpeg.hdf jpeg_img.jpg jpeg2.jpg
fp2hdf -- converts floating point 2D/3D datasets into hdf SDS or RIS.
To test this utility you must first create the ASCII and binary test
files with the fptest program. Then run fp2hdf on the test files that
get created, and analyze the output. Following are the steps to
do this:
1. Run fptest to create 2D/3D ASCII/binary test files:
./fptest
FILE TYPE DIMENSIONS
---- ---- ----------
ctxtr2 TEXT 3x4
ctxtr3 TEXT 5x3x4
cb32r2 FP32 3x4
cb32r3 FP32 5x3x4
cb64r2 FP64 3x4
cb64r3 FP64 5x3x4
Following are the values of the dimension scales and arrays that
get created:
row scale values start at 11 and increment by 1 => 11, 12, 13
column scale values start at 21 and increment by 2 => 21, 23, 25, 27
plane scale values start at 51 and increment by 5 => 51, 56, 61, 66, 71
data element value = row scale value + column scale value [+ plane
scale value, if rank=3]
For an array of [3][4], data values are:
3.200000E+01 3.400000E+01 3.600000E+01 3.800000E+01
3.300000E+01 3.500000E+01 3.700000E+01 3.900000E+01
3.400000E+01 3.600000E+01 3.800000E+01 4.000000E+01
For array of [5][3][4], data values are:
8.300000E+01 8.500000E+01 8.700000E+01 8.900000E+01
8.400000E+01 8.600000E+01 8.800000E+01 9.000000E+01
8.500000E+01 8.700000E+01 8.900000E+01 9.100000E+01
8.800000E+01 9.000000E+01 9.200000E+01 9.400000E+01
8.900000E+01 9.100000E+01 9.300000E+01 9.500000E+01
9.000000E+01 9.200000E+01 9.400000E+01 9.600000E+01
9.300000E+01 9.500000E+01 9.700000E+01 9.900000E+01
9.400000E+01 9.600000E+01 9.800000E+01 1.000000E+02
9.500000E+01 9.700000E+01 9.900000E+01 1.010000E+02
9.800000E+01 1.000000E+02 1.020000E+02 1.040000E+02
9.900000E+01 1.010000E+02 1.030000E+02 1.050000E+02
1.000000E+02 1.020000E+02 1.040000E+02 1.060000E+02
1.030000E+02 1.050000E+02 1.070000E+02 1.090000E+02
1.040000E+02 1.060000E+02 1.080000E+02 1.100000E+02
1.050000E+02 1.070000E+02 1.090000E+02 1.110000E+02
2. Run fp2hdf on the test files that were created:
./fp2hdf ctxtr2 -o ctxtr2.hdf
./fp2hdf ctxtr3 -o ctxtr3.hdf
./fp2hdf cb32r2 -o cb32r2.hdf
./fp2hdf cb32r3 -o cb32r3.hdf
./fp2hdf cb64r2 -o cb64r2.hdf
./fp2hdf cb64r3 -o cb64r3.hdf
./fp2hdf ctxtr2 -o ctxtr2_ris.hdf -raster -e 50 50
./fp2hdf cb64r2 -o cb64r2_ris.hdf -raster -i 50 50 -f
3. Use hdfls and hdfed to verify the correctness of the output
*.hdf files. The rank, dimension size, number type,
dimension scale and data values should agree with those
listed in item 1 above.
You can also use the hdp command. To use hdp from the
util/ directory, type:
For an SDS:
../../mfhdf/dumper/hdp dumpsds <hdf filename>
For a raster image:
../../mfhdf/dumper/hdp dumprig <hdf filename>
Collage can also be used to display the *.hdf files.
Display the spreadsheet and compare the values to those
in Item 1. For the Raster Images, display the image;
the values are interpolated, and will not match the
values as show in Item 1.
ctxtr2.hdf -- 2D SDS, display spreadsheet
ctxtr3.hdf -- 3D SDS, display spreadsheet along z axis.
cb32r2.hdf -- 2D SDS, display spreadsheet
cb32r3.hdf -- 3D SDS, display spreadsheet along z axis
cb64r2.hdf -- 2D SDS, display spreadsheet
cb64r3.hdf -- 3D SDS, display spreadsheet along z axis
ctxtr2_ris.hdf -- RIS, display image
cb64r2_ris.hdf -- 2D SDS, display spreadsheet
RIS, display image
4. Remove ctxtr* and cb*.
rm ctxtr* cb* *.hdf
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