[gdal-dev] hdf5 data to geotiff(the coordinates)

[maven apache]

Hi:
I have some hdf5 data and I want to change the subdataset to geotiff, and I
use gdalinfo to get the subdataset name and then I use "gdal_translate
subdatasetname result.tif".
However  I found that the crs of the generated tif is not recognized by the
arcgis,then I want to know why so I create a new tif by arcgis(here it is
named arcgis.tif,and the coordinate system is wgs84). Then I use gdalinfo
command to get the metadata of the arcgis.tif and compare it with the tif
generated by gdal(here I call it gdal.tif). Then I found that the Coordinate
are the same as the following:
--------------------------
Coordinate System is:
GEOGCS["WGS 84",
    DATUM["WGS_1984",
        SPHEROID["WGS 84",6378137,298.2572235630016,
            AUTHORITY["EPSG","7030"]],
        AUTHORITY["EPSG","6326"]],
    PRIMEM["Greenwich",0],
    UNIT["degree",0.0174532925199433],
    AUTHORITY["EPSG","4326"]]
------------------------------
the difference is the *Corner Coordinates*:
the arcgis.tif is :
-------------------
Corner Coordinates:
Upper Left  ( 103.8438587,  28.6769083) (103d50'37.89"E, 28d40'36.87"N)
Lower Left  ( 103.8438587,  28.6668077) (103d50'37.89"E, 28d40'0.51"N)
Upper Right ( 103.8546032,  28.6769083) (103d51'16.57"E, 28d40'36.87"N)
Lower Right ( 103.8546032,  28.6668077) (103d51'16.57"E, 28d40'0.51"N)
Center      ( 103.8492310,  28.6718580) (103d50'57.23"E, 28d40'18.69"N)
------------------
the gdal.tif is :
----------------
Corner Coordinates:
Upper Left  (    0.0,    0.0)
Lower Left  (    0.0,  720.0)
Upper Right ( 1440.0,    0.0)
Lower Right ( 1440.0,  720.0)
Center      (  720.0,  360.0)
------------------------
It seems that the bbox is defined by different manner , the arcgis.tif is by
Degrees minutes and seconds and the gdal.tif is by grid of some other?

I wonder how to solve this problem?
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