jofer

44 ms·

391.
by jofer 9y ago
The problem is time. There aren't that many multibeam sonar vessels in the world. They acquire data over narrow swaths. Mapping all ocean basins with multibeam would take a long time. I've always heard estimates of a few hundre
392.
by jofer 10y ago
You should have a look at GPlates: https://www.gplates.org/ It comes with a default dataset that will get you part way there as far as the raw data goes. There are also several paid mobile apps that add more "nice-look
393.
by jofer 10y ago
Keep in mind it's ~4m resolution. You can't see someone's car parked outside (or at best the car would be a single pixel).
394.
by jofer 10y ago
Equirectangular is not a projection. For all of web mercator's faults, it at least preserves direction, which is nice when you're looking at streets/etc locally. Regardless, all of the web mapping stuff standardized on web m
395.
by jofer 10y ago
LEO isn't the problem. Anything in the orbit these are in has a lifetime of a few years at most unless they have active propulsion (i.e. not debris or microsatellites). The problem with space debris is mostly higher orbits where it wi
396.
by jofer 10y ago
It is! The doves actually tweet!
397.
by jofer 10y ago
That's a tasking model. The satellites can't capture everything, so they get a list of specific regions to observe. In other words, you need to know ahead of time what area you want to observe and you'll tell a satellite to p
398.
by jofer 10y ago
The US has surprisingly few restrictions on satellite imagery until you get below ~50cm resolution. Beyond a short list of nations/groups that the US has strict export controls with (e.g. N. Korea), there aren't any restrictions
399.
by jofer 10y ago
I think the "notwithstanding additional laws" caveat will protect census data. There are a number of things that require the collection, storage, analysis, and dissemination of census data by law. It's definitely murky, tho
400.
by jofer 10y ago
Yeah, I have one that I loved for reading papers. My only gripe was that it gets heavy/awkward for "light" reading at night. I wound up switching to reading fiction on my phone and papers on the DX. It really is perfect for
401.
by jofer 10y ago
Much worse that 2x. Closer to an order of magnitude worse.
402.
by jofer 10y ago
Actually, it doesn't. The vertical precision of GPS is quite low, so measuring subsidence with gps is very difficult.
403.
by jofer 10y ago
Only for a year or a few years. Biomass doesn't really sequester that much carbon on a long-term scale. You need to move CO2 from the atmosphere into the geosphere. Biomass can do that (e.g. hydrocarbons), but it's inefficient (
404.
by jofer 10y ago
Burying bamboo or other biomass is not a particularly reliable or effective form of carbon sequestration. (Anywhere you bury it, it will decompose and most of the C02 removed from the atmosphere will wind up as CH4 + CO2.) Carbon sequestra
405.
by jofer 10y ago
I was skeptical of this when they first launched the earlier versions, but I actually quite like the way they've done it in the final version. My favorite resume of all time is Matt Hall's stratigraphic column resume: https:&#x2F
406.
by jofer 10y ago
No. The whole point of matplotlib is interactivity and embedability in GUI toolkits. There was nothing else that meet those criteria in Python at the time, and the other options were GUI toolkit specific. Try finding something else that you
407.
by jofer 10y ago
Bridges and tunnels are still represented as linear features in most road datasets. In good ones, there's an attribute to mark it as a bridge or tunnel, and you can choose to use them or not. Including intersections wouldn't signi
408.
by jofer 10y ago
Always good to see geospatial analysis, especially with the toolchain available in Python, these days! One of the downsides of forming polygon from line segments in this way is that it implicitly assumes all lines have a vertex at the inter
409.
by jofer 10y ago
Gradient descent is for non-linear problems where you can't directly invert or somehow linearize the problem.
410.
by jofer 10y ago
It's not historical. It's conceptual and deliberate (and far less confusing than the alternative, i.m.o.). What's likely happening is that you're using a 1D array and a 2D array. If they were both actually vectors, `x.do
411.
by jofer 10y ago
If you're worried about lawyers, why change it to the name of one of the largest companies in the world?
412.
by jofer 10y ago
That is absolutely true. I have a friend that refers to the local highway dept as "the department of outcrop construction". That's also why you should never be in a car with a geologist at the wheel... We spend far too much t
413.
by jofer 10y ago
As a geologist, there's no scientific importance to that specific curb at all. It is a really frequent field trip stop, though. A lot of people go there when they lead field trips (I have too), and it winds up in a lot of photos. Mos
414.
by jofer 10y ago
Judging from your username, I'm going to guess you're an earthquake seismologist. Cheers from the reflection world!
415.
by jofer 10y ago
Numpy specifically doesn't require Fortran. (That was the reason for the original separation of numpy and scipy.) Numpy will compile f2py (to allow running fortran code in python) and I think it uses the Fortran lapack bindings in som
416.
by jofer 10y ago
I'm definitely not a good person to explain or comment on this, but in a nutshell: Black hole collisions were expected to be a fairly common occurrence, but we had no way of knowing for certain how frequent they are when only one had b
417.
by jofer 10y ago
Thanks! I erred on the side of too thick walls instead of too thin, as I was a bit worried about durability. They're thicker than they need to be, though. It would definitely drop costs to make them thinner. As far as clipping along an
418.
by jofer 10y ago
It's still pricey. Making it hollow only helps if it's tall. For color 3D printing, the material is gypsum powder (well, there is CMYK filament now, but I haven't looked into it much). You need considerably thicker walls, e
419.
by jofer 10y ago
Color 3D printing is pretty pricey still. For something of that scale you'd be looking at several thousand dollars, even breaking it down into small individual pieces.
420.
by jofer 11y ago
This is specifically for people who are completely disabled, can't work, and are _already_ eligible to have their loans dismissed. All it does is reduce the amount of paperwork required.

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