danpat

10 ms·

31.
by danpat 8y ago
Your wish is my command - a co-worker just released this a couple of days ago: https://github.com/mapbox/robosat
32.
by danpat 8y ago
I'm typically not particularly paranoid, but if a state actor wanted to destabilize the US economy, increasing the rate of fraud via identity theft sounds like a great way to do it. Crank it up just enough to hurt the economy, but not
33.
by danpat 9y ago
That's apples and oranges. A house and land doesn't become inaccessible if a key is lost, and the gatekeeper of "ownership of land" isn't the mathematics of the blockchain, it's the government.
34.
by danpat 9y ago
The `{name}` field that's the default for most place labels in styles is the "local name", in the local symbol system. Change it to `{name_en}` in your style for place labels, and you'll get English-script names where av
35.
by danpat 9y ago
The basic answer is speed and accuracy. The approximations implemented here are within 0.1% of the Vincenty method for distances under 500km, which is useful in all kinds of situations. The Haversine formula works for spheres, so it'
36.
by danpat 9y ago
Postgresql has base64 encode/decode functions: SELECT convert_from(decode(encode('Hello world','base64'),'base64'),'LATIN1');
37.
by danpat 9y ago
> since Licensors have agreed to license the unexpired Licensed Copyrights and Licensed Patents of the G.729 Consortium Patent License Agreement under the existing terms on a royalty-free basis starting January 1, 2017. Am I reading that
38.
by danpat 9y ago
Multi-frequency phase interference can be used to get sub-cm accuracy without needing ridiculous oscillators. The only problem is that you need to sample your target several times with different frequencies to remove the ambiguity. Units l
39.
by danpat 9y ago
Absolutely this. This is also one of the reasons why there seem to be many successful business where the founder "scratched an itch" - they built a business on something they knew a lot about.
40.
by danpat 10y ago
As a practical example, the aboriginal people of Australia (particularly in the north) refer to a thing called "sickness country": http://www.artistwd.com/joyzine/australia/abr_culture/sickness_co
41.
by danpat 10y ago
Pretty much what you'd expect - massive injuries, sometimes death. Search Youtube for "speed skiing crash" for examples. Sometimes people get lucky and just slide to a stop, depends on how they fall.
42.
by danpat 10y ago
Hello from OSRM :-) I would've quoted exactly the same paper, it's the best overview that I know of.
43.
by danpat 10y ago
Mapbox | ONSITE in Washington D.C. or Berlin, Germany | Systems Engineer - Directions | Full-Time | http://www.mapbox.com/ The Directions team at Mapbox is looking for someone to help grow our navigation platform infrastruc
44.
by danpat 10y ago
This approach, while good for setting a lower bounds for what's sustainable, is rarely how you should first price things. I run a small side business. My initial customers I priced like this. After the first year, I realized I was le
45.
by danpat 10y ago
Hmm, that's no good. I'll let our operations folks know right away. In the meantime, you can email me at daniel@mapbox.com and I can manually add you to our applicant tracking system.
46.
by danpat 10y ago
Mapbox | ONSITE in Washington D.C. or Berlin, Germany | Systems Engineer - Directions | Full-Time | http://www.mapbox.com/ The Directions team at Mapbox is looking for someone to help grow our navigation platform infrastruc
47.
by danpat 10y ago
I went through this - it definitely affected me, but I wouldn't call it a negative. It wasn't so much the living away from home (we were overseas for 2 years when I was 10 years old) it was the return - the shocking disparity betw
48.
by danpat 10y ago
Just for kicks, I used OSRM and added a large time penalty for taking left-hand turns. Here's the kind of route you get: http://imgur.com/VW63fq1 In reality, the metric probably needs to be a lot more complex than what
49.
by danpat 10y ago
I went looking. After years of cruft work, I took some time off to pursue other interests. When I was ready to come back to software development, I took a good hard look at the things I actually enjoyed doing, then went looking for organi
50.
by danpat 10y ago
Interestingly, according to this summary: http://drivinglaws.aaa.com/tag/telematics/ there are exemptions of some kind for navigation systems in many places. I've heard "it's not allowed by law&qu
51.
by danpat 10y ago
Check out the http://maps.me/en/home app - it gives you offline routing using OpenStreetmap data on your phone. Google Maps also supports offline downloads, but from what I remember, they expire every 30 days, so you n
52.
by danpat 10y ago
Believe it or not, there exists a Nash equilibrium for this. There are several papers discussing various approaches to optimally distributing traffic so everyone gets the best possible route given all the cars on the network: http:/&
53.
by danpat 10y ago
OSRM is looking at improving this exact situation right now: https://github.com/Project-OSRM/osrm-backend/pull/2912
54.
by danpat 10y ago
I'm paid to work on navigation software: http://www.project-osrm.org/ The answer to your question is: because it's hard to make some of these adjustments on-the-fly and still have reasonably fast queries. On embed
55.
by danpat 10y ago
I work on navigation software ( http://project-osrm.org/ ). Many of the algorithms we're implementing (or at least considering) only exist in recently published papers, or sit behind unpublished APIs. There have been hu
56.
by danpat 10y ago
The difficulty is that the performance of queries on the final graph is dependent on it's shape. As lorenzhs said, you want the shortcuts to be as long as possible. The final shape of the graph is highly dependent on the order you con
57.
by danpat 10y ago
I'm one of the OSRM devs. To expand on this comment a bit - OSRM still uses Dijkstra, so if you understand that, you already basically understand what OSRM does. What OSRM does in order to speed things up is optimize the graph structur
58.
by danpat 10y ago
You can type place names into the entry boxes on the front-end - they get converted to lon/lat using a geocoding database. OR you can drop pins on the map.
59.
by danpat 10y ago
For once, C++ got some usability right and created std::map and std::unordered_map which have explicit key ordering behaviour. Now, back to waiting for my project to compile.....
60.
by danpat 10y ago
A plug for one of my co-workers who recently finished his PhD on alternative route finding: http://algo2.iti.kit.edu/documents/Dissertation_Kobitzsch_Mo... Choice quote from page 50: k-Shortest Path. A, at the first g

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