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need help. how to uncompress .img files from magellan
ncc1701d
post Jan 6 2011, 11:33 PM
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Hoping someone can help.
I am trying to uncompress the FMAP .img files which are part of magellans images of venus so I can use a converter program to convert them from sinusodal to cylindrical mapping.

Things I do know is that I can just rename .img to .raw and open in photosho however the converter program newmap.exe which is an old dos program that is provided with the FMAP images requires I think the uncompressed .img files in order to convert sinusodal to cylindrical. I know the .raw didnt work. And I get error saying my .img files are compressed so it wont work.
I know .img files are not cd or dvd image file or so I think becuase I could not open them in MagicISO If they were CD images I would think MagicISO would work but I may be wrong though.
Anyone familiar with what I am trying to do. Any image processing guys out their do this with the magellan FMAPS?
I figure the experts would be here.
thanks
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siravan
post Jan 7 2011, 03:13 AM
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This is the file I got:

Attached Image


I'm not sure about the vertical line in the middle. Is this expected in reprojection?

The source code is Attached File  newmap.c.zip ( 10.66K ) Number of downloads: 796
. It still needs to be run in command prompt. Note that I could not reproduce the error.
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ncc1701d
post Jan 7 2011, 03:24 AM
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I have to think on this now. Its not what I expected. I didnt expect a line in center but we may be getting into territory of blind leading the blind since i am still learing this program.
Can you tell me exactly what you typed at the dos prompt while using newmap to get this image?
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Posts in this topic
- ncc1701d   need help. how to uncompress .img files from magellan   Jan 6 2011, 11:33 PM
- - djellison   URL to the files in question?   Jan 6 2011, 11:39 PM
- - Phil Stooke   .img files are not compressed, they are basically ...   Jan 6 2011, 11:44 PM
|- - ncc1701d   here is the link ftp://pdsimage2.wr.usgs.gov/cdrom...   Jan 7 2011, 12:42 AM
- - elakdawalla   I can't remember if the FMAPs are stored the s...   Jan 7 2011, 12:31 AM
- - siravan   IMG files usually have either a text header or a s...   Jan 7 2011, 12:46 AM
- - ncc1701d   concerning the other post i just noticed. I used ...   Jan 7 2011, 12:49 AM
- - siravan   Here is the first image (reduced to 25% of its ori...   Jan 7 2011, 01:10 AM
|- - ncc1701d   I appreciate all the input here so thank you all. ...   Jan 7 2011, 01:37 AM
- - siravan   I recompiled newmap for XP using the source code c...   Jan 7 2011, 02:34 AM
|- - ncc1701d   for some reason I get my same message *** ERROR *...   Jan 7 2011, 03:00 AM
- - siravan   This is the file I got: I'm not sure about ...   Jan 7 2011, 03:13 AM
|- - ncc1701d   I have to think on this now. Its not what I expect...   Jan 7 2011, 03:24 AM
- - siravan   This is the correct image (I made a mistake in rea...   Jan 7 2011, 03:58 AM
|- - ncc1701d   are you just typing newmap fl73n003.img fl73n003...   Jan 7 2011, 06:36 AM
|- - ncc1701d   thanks siravan I got it to work. My problem was th...   Jan 7 2011, 08:31 AM
- - JohnVV   if you want it is cylindrical you could grab them ...   Jan 7 2011, 07:16 AM
|- - ncc1701d   JohnVV I used to use pdsmaps and it was very helpf...   Jan 7 2011, 08:43 AM
|- - elakdawalla   QUOTE (ncc1701d @ Jan 7 2011, 12:43 AM) m...   Jan 7 2011, 05:03 PM
|- - ncc1701d   ok here is little more clarification about what bu...   Jan 7 2011, 08:54 PM
- - JohnVV   some of it still works http://www.mapaplanet.org/e...   Jan 7 2011, 10:27 AM
- - Phil Stooke   I agree, I use Map-a-Planet all the time and reall...   Jan 7 2011, 08:44 PM
- - elakdawalla   OK, I see your problem. The "Center of Proje...   Jan 7 2011, 09:08 PM
|- - ncc1701d   Thank you. I found it. Just out of curiosity did y...   Jan 7 2011, 11:54 PM
- - JohnVV   early on i liked pds-map-a-planet for the simple ...   Jan 8 2011, 12:27 AM

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