3D shape, cartography, and geoid of Comet 67P C-G |
3D shape, cartography, and geoid of Comet 67P C-G |
Aug 6 2014, 02:11 PM
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#1
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Solar System Cartographer Group: Members Posts: 10226 Joined: 5-April 05 From: Canada Member No.: 227 |
Explorer 1 said:
"A 2D map of C-G seems like a tough order; the projection math alone..." Don't worry! If you can put a grid on the surface (as we have seen already), you can warp that grid into any map projection you like. Mapping will be no huge problem - in fact I expect they have a rough one already (I've been playing with one myself). 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) |
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Sep 3 2014, 05:14 PM
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#2
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Member Group: Members Posts: 890 Joined: 18-November 08 Member No.: 4489 |
QUOTE Is that your own shapemodel or is it something ESA have made that is in the public domain? no it is all mine i used motion to make a "point cloud" from two videos then meshed it and just finished a rough edit i am about to add details from the images using "shape from shade" an old bit of code from a siggraph paper "mini_sfs" and a newer phd paper and code http://code.google.com/p/hyperion-cv/ i have NOT uploaded version TWO yet version 1 is here https://googledrive.com/host/0B6ZYAd08tZL-V...21-2014Mesh.zip --- VERSION 2 is here "67P.09.03.2014.zip" https://googledrive.com/host/0B6ZYAd08tZL-V....09.03.2014.zip |
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Sep 3 2014, 08:54 PM
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#3
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Member Group: Members Posts: 241 Joined: 22-August 05 From: Stockholm Sweden Member No.: 468 |
no it is all mine i used motion to make a "point cloud" from two videos Ah, you used ESAs videos of their shapemodel and reverseengineered it. Clever. I'm just using the "raw" images to build my own. (I want to make it from scratch just as an exercise in image processing) I'm using a very simple shape from shading algorithm that i made myself to add the details. (Would make your skin crawl) The race is on |
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Sep 3 2014, 09:09 PM
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#4
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Junior Member Group: Members Posts: 40 Joined: 28-July 07 Member No.: 2984 |
I'd be interested in grabbing whatever you guys come up with. Point cloud is OK. Then I can play with gravity modeling. |
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