Mercury map

[John Van Vliet]

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[ElChristou]

Nice!

[t00fri]

John,

The second image from the left in in the middle row looks like a "partially-peeled orange".

Somebody, obviously didn't get the parameters right for the reprojection to simple cylindrical.
Where did you get the missing craters from, in case LOK is OFF? From the Moon?

Fridger

[John Van Vliet]

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[t00fri]

Well I can't help it, but there is definitely a BUG in the projection. I was not talking about the stripe, but rather that bulge on the right in the back

Here



That together with the central stripe makes your Mercury look like that partially peeled orange. I would certainly be able to correct for these artefacts in no time...


Fridger

[John Van Vliet]

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[cartrite]

most of the craters line up with the old ( not great ,bad reprojection ) map

john,
From your other thread.

Code: Select all

cam2map from=\$1.cub map=map1.map to=\$1.map.cub trim=yes  lonseam=continue interp=bilinear pixres=map defaultrange=camera -batchlist=cube.lis

Sorry, I'm a big dummy. Didn't see map=map1.map
I don't see a projection map. The default map is

Code: Select all

$base/templates/maps/sinusoidal.map

It kind of looks like that is what you are using.
The problem is, unless you edited that map, all the details are commented out as follows.

Code: Select all

Group = Mapping
  ProjectionName = Sinusoidal
# CenterLongitude = 0.0
End_Group


If something is wrong with the projection, that may be why.
I use a copy of the simplecylindrical.map.

Code: Select all

Group = Mapping
  ProjectionName = SimpleCylindrical
  CenterLatitude  = 0.0
  CenterLongitude = 0.0
End_Group


Code: Select all

cam2map ........ map=/srv/disk5/ctx-work/simplecylindrical.map

Just a thought.
cartrite

[John Van Vliet]

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[cartrite]

I'm not sure how " pixres=map " will react or if there is a problem in the cam2map code with that. I never heard anything but I always use pixres=mpp and put in the resolution. With your map it would be "cam2map ........... pixres=mpp resolution=925.0 ........."
cartrite

[cartrite]

There is another thing to consider. When you ran spiceinit, it looks like you did not specify a shape model. I had problems projecting phobos because there was no shape model. Mercury is spherical though but I'm not sure if this would cause a problem or not. Mars uses the MOLA 128 ppd shape model in the data/base/dems folder and it can be considered spherical.
Maybe try to post a question at ISIS support?
cartrite

[cartrite]

Oh Yeah,
cam2map has a new option if you are using the latest ISIS3 version 3.1.16. It's MatchMap and it is "true" or "yes" by default. You might want to set that to no.
cartrite

[cartrite]

I just got done playing around with a few of the images and it seems that what you got is good. There is a problem with lack of data and some of the data having only a view at a slight angle. Some of the longitudes are being viewed "edge on" which tends to stretch them out when mapped.

As for lighting, it looks like you never ran "equalizer" after cam2map and before automos. This can fix some lighting issues. Might get rid of the bulge that Fridger pointed out. Equalizer is hard to get right with a lot of images though as I'm finding out with the ctx images.
cartrite

[ElChristou]

Would be nice to see someday a tutorial with simple example on all the process above...

[t00fri]

Would be nice to see someday a tutorial with simple example on all the process above...

There's a very nice set of step-by-step tutorials with lots of examples on the ISIS3 site.
Certainly more detailed than anybody of us would take the time to do.

http://isis.astrogeology.usgs.gov/IsisW ... isWorkshop

E.g here is a nice introductory tutorial about Map projections and the way they are done in ISIS3:
Learning_About_Map_Projections
http://isis.astrogeology.usgs.gov/IsisW ... rojections

The functions of the many ISIS3 command line utilities is explained here:
http://isis.astrogeology.usgs.gov/docum ... dLine.html
and the systematic reference:
http://isis.astrogeology.usgs.gov/Appli ... index.html
where the use is explained planet by planet...

See also our detailed ISIS3 Workshop@CelestialMatters that I opened some time ago, with lots of discussions and experiments (mainly among cartrite and myself) :

Opening of an ISIS 3 Texture Workshop at CM
http://forum.celestialmatters.org/viewtopic.php?t=194

What else was in your mind?

Fridger

[cartrite]

Would be nice to see someday a tutorial with simple example on all the process above...

Once ISIS3 is installed, the folder isis/doc/Application/ has html pages that list the programs alphabetically or in a group index. These describe what each program does, what to enter, examples, etc. The workshops are very useful too. There is also a support forum where you can post questions if you get stuck.
cartrite

[ElChristou]

Well, Tx for the links, particularly the one from CM!
I didn't knew all the maps could be generated with this ISIS tool. I'll go for some digging now!

[t00fri]

Well, Tx for the links, particularly the one from CM!
I didn't knew all the maps could be generated with this ISIS tool. I'll go for some digging now!

Yes there is interesting stuff over there

Fridger

[danielj]

Where is the 16k VT?
And we actually have ENOUGH data to a 16k map?

[John Van Vliet]

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[BobHegwood]

See the bottom two entries of this page for the old 16K maps.
John's new textures haven't been posted yet, but they will also go to the same page when they are available.

Thanks, Bob