On Sun, Nov 28, 2010 at 7:50 AM, mahesh shiramgond <[email protected]> wrote: > Hi Roger, > > I have OS Windows XP Professional running on my machine with WINRAR > compression software. > I tried accordingly as george advised to change the extension but same > error.
I'm not familiar with WINRAR, but many tools do support bzip2. When you uncompress "filename.bz2" you get "filename". Many of the NASA hdf files do not provide the hdf extension, and will still load in hdfview, but many people prefer to add the extension so the (*.hdf) filter can be used. Unfortunately, this sometimes leads users to rename "filename.bz2" to "filename.hdf", which won't work. On linux or Mac OS X the "file" command can be used to verify that you have an hdf file: $ ls -l A2006167181000.L2* 140096 -rw-r--r-- 1 gwhite bod 143454404 2010-11-28 11:18 A2006167181000.L2 29340 -rw-r--r-- 1 gwhite bod 30040522 2010-11-28 11:18 A2006167181000.L2.bz2 $ file A2006167181000.L2 A2006167181000.L2: Hierarchical Data Format (version 4) data $ file A2006167181000.L2.bz2 A2006167181000.L2.bz2: bzip2 compressed data, block size = 900k > here I noticed that saved file with .hdf extension is appearing with HDF > view icon. > I tried reinstalling HDF view but problem remains same. > > Kindly advise, is there any other interface i can use to view these HDF > files? Many matrix languages (python, matlab, octave, R, gnudatalanguage) can read hdf4 or hdf5 with the appropriate add-ons. Hdf5 is more widely supported and the h4toh5 tool works for the files I have encountered (after a bit of experimenation with the options), so in practice I generally convert hdf4 to hdf5. I find hdfview helpful when trying to understand the structure of hdf files, especially when converting to hdf5, so it is worth making an effort to get hdfview to work. In my lab, we have many supposedly identical Windows XP systems, all initially configured with the same "standard" image. I find hdview fails to work on some of these -- presumably due to conflicts with user-installed software or perhaps different options chosen by the IT tech who configured the systems initially. It isn't a big deal for us, as we do most of the heavy lifting with Mac OS X or linux. > Thanks and Regards > Mahesh > > > On Sun, Nov 28, 2010 at 2:13 PM, Roger Martin <[email protected]> > wrote: >> >> Hi Mahesh, >> >> I believe George was saying don't change the extension but >> uncompress/unzip them. Through these messages I didn't gather which >> operating system you are using and what compression software will work for >> you. Probably the file inside the *.bz2 has the .h5 extension which will be >> there after uncompression. >> >> On linux or MacOSX boxes you can right click and "Extract here". On >> windows I use a small Ant script but that takes understanding Ant. Someone >> should know of a bz2 decompressor for you in the window's case. >> >> >> On 11/28/2010 12:52 AM, mahesh shiramgond wrote: >> >> Hi George, >> >> Do you mean to say that I have to save these files as .hdf while >> downloading? No -- you have to decompress the .bz2 version, which results in an HDF file that may not have the hdf extension. If you want to use *.hdf filter, then you have to rename the HDF format file to give it the appropriate extension. >> >> If yes, do I need to put '.hdf' at the end of the file name? for your >> information this is a zipped file. >> >> If not, do I need to change the name of the file just adding '.hdf' at the >> end of the file name >> >> Please suggest and even first option is not opening file but showing same >> error. >> >> Regards >> mahesh >> >> On Fri, Nov 26, 2010 at 4:54 PM, George N. White III <[email protected]> >> wrote: >>> >>> On Fri, Nov 26, 2010 at 5:10 AM, Steve Bissell >>> <[email protected]> wrote: >>> > >>> > Hi Mahesh. I've never used the MODIS tool, but out of curiosity I >>> > checked the >>> > web site, it looks to me like what you download from those sites are >>> > either >>> > JPEG, PNG, GeoTIFF or GoogleEarth format files. None of those are HDF >>> > file >>> > formats in any way .... or maybe I'm misunderstanding the web site? >>> >>> If you use the "download data" button you get an hdf4 file, but in >>> bzip2 compressed >>> form. This has been a major source of confusion for new users -- it >>> would be nice >>> very helpful if hdfview could do some checks for common archive and >>> compression >>> formats -- people often get data in a form that can't used directly >>> without realizing some >>> extra steps are needed -- a common mistake with NASA OBPG files that >>> don't have .hdf >>> extension is to rename .bz2 to .hdf. >>> >>> > Steve >>> > -- >>> > View this message in context: >>> > http://hdf-forum.184993.n3.nabble.com/HDF-View-file-process-tp1958827p1971771.html >>> > Sent from the hdf-forum mailing list archive at Nabble.com. >>> > >>> > _______________________________________________ >>> > Hdf-forum is for HDF software users discussion. >>> > [email protected] >>> > http://mail.hdfgroup.org/mailman/listinfo/hdf-forum_hdfgroup.org >>> > >>> >>> >>> >>> -- >>> George N. White III <[email protected]> >>> Head of St. Margarets Bay, Nova Scotia >>> >>> _______________________________________________ >>> Hdf-forum is for HDF software users discussion. >>> [email protected] >>> http://mail.hdfgroup.org/mailman/listinfo/hdf-forum_hdfgroup.org >> >> >> >> -- >> Mahesh Shiramagond >> Kuwait >> >> _______________________________________________ >> Hdf-forum is for HDF software users discussion. >> [email protected] >> http://mail.hdfgroup.org/mailman/listinfo/hdf-forum_hdfgroup.org >> >> >> _______________________________________________ >> Hdf-forum is for HDF software users discussion. >> [email protected] >> http://mail.hdfgroup.org/mailman/listinfo/hdf-forum_hdfgroup.org >> > > > > -- > Mahesh Shiramagond > Kuwait > > _______________________________________________ > Hdf-forum is for HDF software users discussion. > [email protected] > http://mail.hdfgroup.org/mailman/listinfo/hdf-forum_hdfgroup.org > > -- George N. White III <[email protected]> Head of St. Margarets Bay, Nova Scotia _______________________________________________ Hdf-forum is for HDF software users discussion. [email protected] http://mail.hdfgroup.org/mailman/listinfo/hdf-forum_hdfgroup.org
