foldable map of Ida |
foldable map of Ida |
Oct 27 2008, 12:57 PM
Post
#1
|
|
Member Group: Members Posts: 140 Joined: 20-November 07 Member No.: 3967 |
Here is a constant-scale natural boundary map of Ida that folds to a decent replica of the asteroid. Map edges are Ida's major ridges.[attachment=16299:Ida_MaxRidge_post.jpg]
[EDIT] Here it is again with the photomosaic properly credited; apologies to M. Nyrtsov for my oversight. |
|
|
Guest_jumpjack_* |
Nov 6 2008, 08:24 AM
Post
#2
|
Guests |
Here is a constant-scale natural boundary map of Ida that folds to a decent replica of the asteroid. Map edges are Ida's major ridges.[attachment=16299:Ida_MaxRidge_post.jpg] [EDIT] Here it is again with the photomosaic properly credited; apologies to M. Nyrtsov for my oversight. I can't believe it! Did anybody build it?!? Does it exist a pic of it completed? |
|
|
Nov 6 2008, 03:07 PM
Post
#3
|
|
Senior Member Group: Members Posts: 2492 Joined: 15-January 05 From: center Italy Member No.: 150 |
I tried with the aid of my son but result was very bad... perhaps, I need to print it on a larger scale (it was A5 size approx).
-------------------- I always think before posting! - Marco -
|
|
|
Nov 6 2008, 05:31 PM
Post
#4
|
|
Member Group: Members Posts: 140 Joined: 20-November 07 Member No.: 3967 |
I've put it together twice -- I'll post a digital pic as soon as I can find a pal with a digital camera -- and the first one went together easier than the other. So it seems that where you start, and which sides you leave the tabs on, makes a difference in the result.
The bigger size definitely helps. I printed it on 11 x 17 (ledger-size) paper. |
|
|
Nov 6 2008, 06:14 PM
Post
#5
|
|
Solar System Cartographer Group: Members Posts: 10226 Joined: 5-April 05 From: Canada Member No.: 227 |
Does my old friend Maxim Nyrtsov read this? Hi Maxim! See you next year!
Yes, Maxim visited me in Ontario in 2000, and helped a lot with the image reprojection work for the global mosaic Chuck has used here. He lives and works in Moscow. Phil -------------------- ... because the Solar System ain't gonna map itself.
Also to be found posting similar content on https://mastodon.social/@PhilStooke Maps for download (free PDF: https://upload.wikimedia.org/wikipedia/comm...Cartography.pdf NOTE: everything created by me which I post on UMSF is considered to be in the public domain (NOT CC, public domain) |
|
|
Guest_jumpjack_* |
Nov 7 2008, 07:26 AM
Post
#6
|
Guests |
It was difficult for me even to build a paper Earth globe, without something to glue the paper on... I can't imagine how I could build such an irregular shape.....
But I guess a 3d model should exist somewhere, if a card model has been prepared: where could I find it? Maybe I could build a model by means of multiple overlapped "slices" of cardstock or wood... |
|
|
Nov 7 2008, 11:41 AM
Post
#7
|
|
Member Group: Members Posts: 106 Joined: 26-September 05 Member No.: 508 |
I built the physical models that Chuck is using to create his maps, if anyone is interested I can cut the computer model in slices that you can print on paper to create your own models.
|
|
|
Nov 7 2008, 12:13 PM
Post
#8
|
|
Founder Group: Chairman Posts: 14434 Joined: 8-February 04 Member No.: 1 |
What format are those models available in?
|
|
|
Guest_jumpjack_* |
Nov 7 2008, 12:52 PM
Post
#9
|
Guests |
I built the physical models that Chuck is using to create his maps, if anyone is interested I can cut the computer model in slices that you can print on paper to create your own models. It was just an idea, I don't know if it is actually feasible to glue the textured paper model over the "sliced carstock model". Anyway it could be interesting to give it a try. Are you going to manually "cut" the model in slices, or does it exist (already? ) a program to do it? BTW, I remember several years ago I used this "slice method" to build a model of Mount Etna, and the result was very very good even without textures, as the border lines stressed the shapes of hills and valleys. |
|
|
Nov 7 2008, 01:06 PM
Post
#10
|
|
Member Group: Members Posts: 106 Joined: 26-September 05 Member No.: 508 |
I can convert the models to most popular formats.
Cutting the computer models in slices is an automatic process. I think it would be feasible to build such a model, the most difficult part would be cutting the slices from cardstock. If you have access to a laser cutter you will only have to glue them, using guide holes that I can add. |
|
|
Guest_jumpjack_* |
Nov 7 2008, 01:20 PM
Post
#11
|
Guests |
I can convert the models to most popular formats. Cutting the computer models in slices is an automatic process. I think it would be feasible to build such a model, the most difficult part would be cutting the slices from cardstock. If you have access to a laser cutter you will only have to glue them, using guide holes that I can add. Actually I didn't use cardstock for Etna model... but I don't know the english name! They were sheets of gum, used to cover floors ("linoleum"?), 1 or 2 mm thick. Quite easy to cut using scissors, as they don't rip like cardstock. |
|
|
Nov 7 2008, 02:16 PM
Post
#12
|
|
Member Group: Members Posts: 140 Joined: 20-November 07 Member No.: 3967 |
jumpjack:
Here is a link Phobos Arts and Crafts that gives tips and pics on assembling these paper models -- Note the link deals with Phobos not Ida, but the assembly tips ought to be transferable. Emily's article also includes (I'll have to confirm this) another link to a post I made here at USF with further tips and alternate method (clear tape) of holding it together -- Emily prefers glue. Oh, Tayfun, now I see your post about the internal slice-packing -- What a superb idea! If you check out the latest posts (and maps) at the "Map of Eros" thread, you'll see my frustration at getting the Eros folded-up map to hold its shape in the Shoemaker region; an internal mass , even if was a fairly loose fit, would, I think, do the trick. The problem will be to coordinate the size properly, so that the photomosaic paper will wrap the insides neatly. The "Tayfun slices" (aim for about 3/8 inch thick; keep it extremely coarse -- not many slices will be needed; as well as a bit undersized) will make on object of a certain scale, and if that matches the scale bar included on the csnb (constant-scale natural boundary) map, things ought to work. Or be close enough that a little fiddling will be all that's needed. When I print the Ida and Eros maps on ledger paper, the assembled (folded-up) objects are about 5.5 inches in longest dimension. They aren't in front of me at the moment, but when I get back to my asteroid lab I'll put the micrometers on them and report. |
|
|
Guest_jumpjack_* |
Nov 10 2008, 08:12 AM
Post
#13
|
Guests |
jumpjack: Here is a link Phobos Arts and Crafts Well, the final result is not at all as I thought it was. I think I won't try it, unless Tayfun post his "sliced" models... |
|
|
Nov 10 2008, 01:33 PM
Post
#14
|
|
Member Group: Members Posts: 140 Joined: 20-November 07 Member No.: 3967 |
OK, I corralled a photographer, (S. Adkins) to take a pic of the folded map.
Here (on the left, courtesy of T. Oner)) is a digital image of Ida; and (on the right) the Adkins photo, taken from approximately the same point of view as the digital image. On the other hand, I think jumpjack is best to wait and hope that Tayfun will make a slices-infill. Two reasons: 1) IN GENERAL: These are experimental maps; folding up to make a convenient, holdable model is a nice property, but the maps are far from perfect (the technology at the moment uses -- to make outlines and graticles -- the very latest of Renaissance graphical techniques, and Photoshop to add the photomosaics). 2) IN SPECIFICS: With the exception of a few crania I mapped a while back, Ida is the most complicated form yet attempted in constant-scale natural boundary mapping, certainly the most extravagantly shaped asteroid. Something (on the back side of this view!) is a little amiss -- to kinked or cramped -- around point "n.". It's easy for the geometry to slip a bit, and the edge get a little out of alignment or true constant-scale; this is probably the problem. Printers can also be a bit out of relative proportional accuracy. So best to take this all with a grain of salt. |
|
|
Nov 10 2008, 03:13 PM
Post
#15
|
|
Member Group: Members Posts: 106 Joined: 26-September 05 Member No.: 508 |
Chuck the comparison photo is really impressive.
Due to Ida's irregular shape slices will not be contiguous and I suggest first we try it with Phobos. I will post the slices in DXF and CDR formats in a few days. |
|
|
Lo-Fi Version | Time is now: 22nd September 2024 - 12:01 AM |
RULES AND GUIDELINES Please read the Forum Rules and Guidelines before posting. IMAGE COPYRIGHT |
OPINIONS AND MODERATION Opinions expressed on UnmannedSpaceflight.com are those of the individual posters and do not necessarily reflect the opinions of UnmannedSpaceflight.com or The Planetary Society. The all-volunteer UnmannedSpaceflight.com moderation team is wholly independent of The Planetary Society. The Planetary Society has no influence over decisions made by the UnmannedSpaceflight.com moderators. |
SUPPORT THE FORUM Unmannedspaceflight.com is funded by the Planetary Society. Please consider supporting our work and many other projects by donating to the Society or becoming a member. |