h3
Papercups
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h3 | Papercups | |
---|---|---|
21 | 19 | |
4,588 | 5,615 | |
2.1% | 0.9% | |
7.1 | 0.0 | |
23 days ago | 2 months ago | |
C | Elixir | |
Apache License 2.0 | MIT License |
Stars - the number of stars that a project has on GitHub. Growth - month over month growth in stars.
Activity is a relative number indicating how actively a project is being developed. Recent commits have higher weight than older ones.
For example, an activity of 9.0 indicates that a project is amongst the top 10% of the most actively developed projects that we are tracking.
h3
- H3: Hexagonal hierarchical geospatial indexing system
- Evaluation of Location Encoding Systems
- Not sure if this is the worst or most genius indentation I've seen
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A population density map of the state of Pennsylvania
It looks like the base Kontur dataset uses H3 resolution 8, and there’s a lookup table here. “400m” seems to refer to the edge length (which averages to 461m).
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[ANN] HexTree: geographical region-to-value mapping
I can speak to quadtrees, but the primary reason for using this is that you need a geographic "dictionary" (not using the word map to avoid confusion with charts), and you're perhaps already using the H3 hexagonal grid system.
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What's everyone working on this week (34/2022)?
HexSet: is a way of storing a set of H3 cells in a tree, and doing fast (2-20 ns on my 2013 trashcan Mac Pro) membership tests. You must first convert the input data (e.g. GeoJSoN polygon) into H3 cells.
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Surprising result while transpiling C to Go
> What an amazing tool that can completely change function names when it converts from C to Go.
How can one read the code of the benchmark, then switch into virulent sarcasm mode without trying to understand the code? And seeing "+1" comments without any effort to understand is also disheartening.
The blog post had a link about the Go helper functions the author used. It lands on https://github.com/akhenakh/goh3/blob/main/h3.go This shows that the `FromGeo()` function used by the Go benchmark is a helper that calls transpiled functions. The benchmark code itself was of course not transpiled, so the sarcasm was unneeded and wrong.
If anyone wants to dig in deeper, the C function `latLngToCell()` calls 2 functions, see https://github.com/uber/h3/blob/master/src/h3lib/lib/h3Index...
- Completely ignorant Newbie needing help with launching Ubers H3 Software.
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Anyone doing geospatial queries? NoSQL? Amazon Location Service?
Uber just released their library to perform geospatial indexing - https://h3geo.org/. This might be an useful building block for you.
Papercups
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Linen.dev – Building a chat app with Elixir and NextJS
The best language for the task at hand, when presented with time constraints, is the one that you already know well. OP said in the article that they authored Papercups [1]. Adopting Elixir for a websocket-push service makes a lot of sense, then. However, why don't you learn Elixir, some OTP, and then reconsider that question? You could be missing out.
[1] https://github.com/papercups-io/papercups
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What Phoenix Elixir Tutorial do you want to see?
https://github.com/papercups-io/papercups - 5.2k stars, uses Phoenix 1.6
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Complete, Production-Ready Phoenix Reference Applications
Papercups
- Looking for recommendation of OS phoenix app to look at
- Example of an elixir CRUD app in production
- Show HN: Open-source live customer chat
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Lessons from answering 800 customer support queries in last 2 yrs as a founder
Shameless plug here if anyone is interested in an open source live chat tool check out https://github.com/papercups-io/papercups
- Create a conversation with Elixir with real code examples
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Ask HN: What novel tools are you using to write web sites/apps?
Phoneix - Elixir
We're a live message tool and it is basically what Elixir is built for https://github.com/papercups-io/papercups.
The Elixir community has been great and incredibly friendly. I originally was worried about the size of the community but that hasn't been an issue the community has been super helpful. I also think the annual stackoverflow usage surveys are very misleading because most of the community's questions get asked in ElixirForum and not on Stackoverflow.
Phoneix is the web framework of Elixir which is very similar to Rails but minus a lot of the magic has been very helpful for our productivity as well.
If I had to built another service that is websocket heavy I would definitely use Elixir. Even if it was a standard crud app I would still most likely choose Elixir.
- Papercups – open-source live customer chat in Elixir
What are some alternatives?
S2 geometry - S2 geometry library in Go
chatwoot - Open-source live-chat, email support, omni-channel desk. An alternative to Intercom, Zendesk, Salesforce Service Cloud etc. 🔥💬
Leaflet - 🍃 JavaScript library for mobile-friendly interactive maps 🇺🇦
SvelteKit - web development, streamlined
mapbox-gl-js - Interactive, thoroughly customizable maps in the browser, powered by vector tiles and WebGL
Gotify - A simple server for sending and receiving messages in real-time per WebSocket. (Includes a sleek web-ui)
starlink-coverage - Calculating some statistics about Starlink satellites
LeapChat - Ephemeral, encrypted, in-browser chat rooms
s2geometry - Computational geometry and spatial indexing on the sphere
LibreNews - A free and open breaking news notification platform
maplibre-gl-js - MapLibre GL JS - Interactive vector tile maps in WebGL2
PushBits - A simple server for push notifications via Matrix (and a minimalistic alternative to Pushover and Gotify) 🚀📯