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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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JohnVV
post Jan 7 2011, 07:16 AM
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if you want it is cylindrical you could grab them from PDS map a planet
and they will BE in that format if you choose it
http://www.mapaplanet.org/explorer/venus.html
http://pdsmaps.wr.usgs.gov/PDS/public/expl...l/gredrintm.htm
http://pdsmaps.wr.usgs.gov/PDS/public/expl...ml/gtdrintm.htm

there is a size restriction and it might take 24 hours for a 2 gig image to have a ink mailed to you.

but when i made the map for celestia i used the data listed on the pds geosciences page
http://pds-geosciences.wustl.edu/missions/.../gxdr/index.htm
the gredr
http://pds-geosciences.wustl.edu/geo/mgn-v.../mg_3002/gredr/
mixed with the data from gedr
http://pds-geosciences.wustl.edu/geo/mgn-v...1/mg_3002/gedr/
and the topo map
http://pds-geosciences.wustl.edu/geo/mgn-v...1/mg_3002/gtdr/
mixed with some of
http://pds-geosciences.wustl.edu/geo/mgn-v...1/mg_3002/gsdr/

then a BUNCH of "inpainting"


but you are using Microsoft ???? hhhmmmm might be fun
i used ISIS3 on linux
but the north and south are in polar stereo projection and Gimp can remap that to cylinder
so can the old AND STILL GOOD tool MMPS
http://www.users.globalnet.co.uk/~arcus/mmps/
i do not know if there is a prebuilt windows
I DO know it dose build on windows xp using MinGW - i did that a few years back
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ncc1701d
post Jan 7 2011, 08:43 AM
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JohnVV
I used to use pdsmaps and it was very helpfull but it looks to me now the content wont show up. Does it still work for you showing content and everything? I just see an icon where images should show up.

mapaplanet I dont like much. I miss lat and long boxes for finding your way around like pdsmaps had. Some small features are harder to find your way back to in mapaplanet
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elakdawalla
post Jan 7 2011, 05:03 PM
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QUOTE (ncc1701d @ Jan 7 2011, 12:43 AM) *
mapaplanet I dont like much. I miss lat and long boxes for finding your way around like pdsmaps had. Some small features are harder to find your way back to in mapaplanet

It took me a little while to get used to the new mapaplanet, but as JohnVV said you just need to open the advanced options on lower left and you can input lat/lon and even change the longitude of projection, which is nice. My only complaint about mapaplanet is that it is slow.


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ncc1701d
post Jan 7 2011, 08:54 PM
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ok here is little more clarification about what bugs me on mapaplanet. I have played with advanced before and wish their was center of latitude field as well. Maybe your guys expertise will help.
Given the information provided here concerning pankake volcanoes

http://en.wikipedia.org/wiki/File:PIA00084...e_volcanoes.jpg

it says
This Magellan full resolution mosaic, centered at 12.3 north latitude, 8.3 degrees east longitude,

In this new advanced tool area I can enter in a 8.3 in the "center of longitude of projection field" at the bottom and I suppose I can do some guessing to enter in the right number in the north,west,east south fields and may find my way.
I am not successuful at it.
I would be curious how fast the experts can find out this volcano location in mapaplanet given the information above

verses pdsmaps where you just enter in fields a center of long and lat and then just set the long lat boxes of degrees to view.


and...

Also then if i enter in the wrong numbers when guessing the nortt,west,east,south my center of long of projection changes and other numbers automatically change and then I start getting lost.

Maybe this should be easier and I am missing something simple? I just dont remember having all these issues in pdsmaps





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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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