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A 5.7 Terapixel Mosaic of the Surface of Mars

murray-lab.caltech.edu

21–30 of 64 posts

Re: A 5.7 Terapixel Mosaic of the Surface of Mars

#21
post #12

Actual site: https://murray-lab.caltech.edu/CTX/

Wow that 3D viewer is smooth on mobile phone. So amazing to pinch and scroll around the planet.

Are there photos anywhere? The 3D viewer's just showing black for me. (Viewer itself loaded, but as though no data specified/loaded - except what I assume are different views to jump to listed at the bottom.)

Re: A 5.7 Terapixel Mosaic of the Surface of Mars

#22
post #11

It's quite amazing and simultaneously ridiculous that we have a public 3D model of a distant planet at 5 meters resolution while the best available free and public models of Earth are at 30 meters.

It’s easier to cleanup someone else’s house.

Re: A 5.7 Terapixel Mosaic of the Surface of Mars

#23
post #15
post #13

Earlier quoted context omitted.

You can fly your satellites lower in mars due to atmosphere density, as low as 20km it appears

On top of that isn't the lower resolution on earth more for military reasons than a technical one or is this not the case any more?

Hasn't been really the case since french airbus started offering highres global imagery. If you have deep pockets, you can buy 30cm/px (i.e. order of magnitude better than this Mars dataset) images of pretty much anything.

Re: A 5.7 Terapixel Mosaic of the Surface of Mars

#24
post #21
post #12

Earlier quoted context omitted.

Wow that 3D viewer is smooth on mobile phone. So amazing to pinch and scroll around the planet.

Are there photos anywhere? The 3D viewer's just showing black for me. (Viewer itself loaded, but as though no data specified/loaded - except what I assume are different views to jump to listed at the bottom.)

Downloadable dataset here: https://murray-lab.caltech.edu/CTX/V01/tiles/

Please do not hammer the service unnecessarily, it's nice that they offer this publicly so lets not ruin the commons here.

Re: A 5.7 Terapixel Mosaic of the Surface of Mars

#25
Perseverance's path puzzled me. The good thing is that NASA has an up-to-date map [0] of its path, also joined by lines, which shows more of the path and also confirms how odd some stretches of its voyage have been.

Does anyone know why it spent so much time going back and forth?

---

Edit: I see, it was always going back to the "Sample Depot Zone" to deposit the collected samples. This zone is where the chaos begins after the very long stretch. Here's [1] more info on the depot, including a photo made by the rover of what such a deposited sample looks like.

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[0] https://mars.nasa.gov/mars2020/mission/where-is-the-rover/

[1] https://www.nasa.gov/feature/jpl/nasa-s-perseverance-rover-c...

Re: A 5.7 Terapixel Mosaic of the Surface of Mars

#26

That's spectacular. I'm curious how much storage space the entire dataset consumes in it's compresed form?

> The mosaic images are stored in zip files that reduce the download size. The entire mosaic (compressed) is 5.6 TB, including seam maps but not including overviews for the GeoTiff files. Unzipped and uncompressed, the entire mosaic is 11.484 TB, including overviews.

Re: A 5.7 Terapixel Mosaic of the Surface of Mars

#27
post #11

It's quite amazing and simultaneously ridiculous that we have a public 3D model of a distant planet at 5 meters resolution while the best available free and public models of Earth are at 30 meters.

WorldView-3 claims to be 31cm resolution: https://worldview3.digitalglobe.com/

Not public. I don't even see a pricing page, so can assume very pricey.

Re: A 5.7 Terapixel Mosaic of the Surface of Mars

#28
post #19
post #14

So each pixel is about 5m x 5m? With Mars having a surface area of about 145 million square km, or 145 trillion square metres

Correct.

Makes me wish we had a 5x5 model of the earth. The only really freely available terrain data set is 30x30 for the world and there is the 25x25 DEM for Europe by Copernicus.

Re: A 5.7 Terapixel Mosaic of the Surface of Mars

#30

Many years ago, X-Plane version 8 or 9 included Mars scenery. This would make for a nice upgrade of that. The scenery was a bit lacking in detail and the atmosphere and gravity were of course adjusted. Pretty hard to fly there because the atmosphere is very thin. So, basically, you need some kind of rocket plane that flies at insane speeds. Makes for interesting take offs and landings.

Or much bigger wings. Pretty viable given the gravity.
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