need help. how to uncompress .img files from magellan |
need help. how to uncompress .img files from magellan |
Jan 6 2011, 11:33 PM
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#1
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Junior Member Group: Members Posts: 91 Joined: 21-August 06 Member No.: 1063 |
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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Jan 7 2011, 07:16 AM
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#2
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Member Group: Members Posts: 890 Joined: 18-November 08 Member No.: 4489 |
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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Jan 7 2011, 08:43 AM
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#3
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Junior Member Group: Members Posts: 91 Joined: 21-August 06 Member No.: 1063 |
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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Jan 7 2011, 05:03 PM
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#4
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Administrator Group: Admin Posts: 5172 Joined: 4-August 05 From: Pasadena, CA, USA, Earth Member No.: 454 |
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. -------------------- My website - My Patreon - @elakdawalla on Twitter - Please support unmannedspaceflight.com by donating here.
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Jan 7 2011, 08:54 PM
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#5
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Junior Member Group: Members Posts: 91 Joined: 21-August 06 Member No.: 1063 |
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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