One obvious optimization that would half the size of the data and also solve the gaps problem is to keep every border between two states once and not twice (for each polygon).
This would require some processing of the geometry to find the intersection points, but assuming that in the original data, the border between two states is the same exact line, it shouldn't be hard.
Readit Newsm2fkxy commented on Mapping latitude and longitude to country, state, or city austinhenley.com/blog/coo... · Posted by u/azhenley
m2fkxy commented on Mapping latitude and longitude to country, state, or city austinhenley.com/blog/coo... · Posted by u/azhenley
> A side effect of the geometry simplication is that there are some very small gaps between states. Based on your use case, you'll need to handle the case of the point not being within any state borders. In these rare cases, you could fall back to a different method, such as distance checking centroid points, adding an episilon to all state borders, or simply asking the user. (The user may also be in another country or in the ocean...)
This is a common topic and easily dealt with by working with topology-informed geometries; most simplification algorithms support topology handling between different features. For instance, TopoJSON can be used.
I know this is not the right place for this but english is not my first language.
How is "have" the correct verb here? Shouldn't it be "has"? Like, the crew is the subject, and it has 35 seconds.
I'm trying to understand what I'm missing here, because I'm sure BBC did not make a mistake
it depends on what flavour of English you speak. British English for instance tends to use plural for collective nouns.
m2fkxy commented on Uber to introduce fixed-route shuttles in major US cities techcrunch.com/2025/05/14... · Posted by u/rpgbr
This sounds like marshrutki. These are very common in post-Soviet countries to fill the demand left unmet by public transportation service.
I've seen this comment widely. But...why doesn't TCAS show the pilots at least as much information as I would have seen on my phone if I'd been browsing flightradar at the time? It's one thing to design a system with "don't saturate the operator with audible alerts" but another to say that it's appropriate to withhold very valuable information from the operator ("there are loads of planes in the general vicinity, but yeah look at that one coming at you from the left").
the TCAS data would have been displayed. but not on instruments or in any place that you typically pay attention to the most during final visual approach (ie., mostly outside).
It’s likely both the helicopter and the jet received a TCAS warning. In dense airspaces, those alerts tend to trigger frequently, so there’s a strong chance they may have dismissed it. The CRJ crew might have been aware of the Blackhawk’s presence, but if the other crew had visual contact with the approaching traffic (the CRJ), they might not have felt the need to take further action.
TCAS RAs are inhibited at low altitude.
m2fkxy commented on Celestial Navigation for Drones mdpi.com/2504-446X/8/11/6... · Posted by u/throw0101b
An idea: use satellites for navigation. No, not the satellite signals, but the satellites themselves. Use NORAD orbital elements data for satellites to deduce land coordinates using time and pixel coordinates of satellites observed. Low orbit satellites will be only observable for two hours or so after sunset and before sunrise, but there are enough medium Earth orbit satellites that are still bright enough for a small camera and are visible whole night.
yeah, and then you need to get refreshed orbital elements for those satellites. not good if you are in an airtight environment.
celestial ephemerides don't change nearly as much.
m2fkxy commented on An Update on Apple M1/M2 GPU Drivers lwn.net/SubscriberLink/99... · Posted by u/MrBuddyCasino
your point being?
m2fkxy commented on 'Visual clutter' alters information flow in the brain news.yale.edu/2024/10/22/... · Posted by u/gnabgib
But I’d like to know!
You can look into TopoJSON here: https://github.com/topojson/topojson And a good general introduction to topology in GIS setting is nicely found in QGIS documentation: https://docs.qgis.org/3.40/en/docs/gentle_gis_introduction/t...