Find3
Infrastructure
indoor positioning
SHOW HN2018
How HN took it
5 positive, 15 neutral or asking, 1 mixed, 7 critical, out of 28 comments about the project. Thread score -0.05.
Performance: 0 for, 4 againstIdea: 2 for, 1 againstExecution: 1 for, 1 againstPrivacy: 0 for, 1 against
The thread, comment by comment
Each row is a top-level comment and its replies, in HN's order. Select a cell to open that comment on HN.
positive neutral or mixed critical about another commenter or something else the maker
What HN said
What people liked
Works well and gives precise positioning within a home
From 1 comment
Really cool idea, and it works really well. Was able to do very precise positioning in my house, even within a single room if given multiple references. Ultimately it drained the…
tyldum on HN
Useful idea for home setups
From 1 comment
Just be aware that the public server in the app has no access control. Your location will be published. You probably really want to set up a private server to use this in…
nielsole on HN
Objections
No benchmarks or stated precision
From 2 comments
The byline says "High-precision" but I could not find any benchmarks or scientific analysis. What does high precision mean here? How stable is it? What about privacy of the…
llao on HNYep. Needs to answer what is the precision?
consultutah on HN
RSSI is too noisy for accurate indoor positioning
From 3 comments
Haven't read through the code yet, but the only thing I need to know is if these guys know what Rayleigh scattering is. If not, this probably isn't going to work so great. I…
coupdejarnac on HNYeah, that makes sense. But that's not going to be very accurate. That will be accurate at the tuple space, but not down to the nearest centimeter in X Y coordinates or anything…
coupdejarnac on HNWIFI RSSI on its own is incredibly inaccurate. In our research (previous company) we found it performed decently well in an environment with little to no other devices and simple…
agotterer on HN
Public server has no access control, exposing location data
From 2 comments
Just be aware that the public server in the app has no access control. Your location will be published. You probably really want to set up a private server to use this in…
nielsole on HNThe byline says "High-precision" but I could not find any benchmarks or scientific analysis. What does high precision mean here? How stable is it? What about privacy of the…
llao on HN
Drains phone battery
From 1 comment
Really cool idea, and it works really well. Was able to do very precise positioning in my house, even within a single room if given multiple references. Ultimately it drained the…
tyldum on HN
Requests
Document precision and system requirements
From 2 comments
Pardon the laymen’s questions, but my understanding of precision location is that it requires triangulation + accurate timestamps (the more accurate the more precise), plus with…
gricardo99 on HNYep. Needs to answer what is the precision?
consultutah on HN
Add filtering over time
From 1 comment
Does it do filtering over time?
dimatura on HN
Questions
How does signal fingerprinting map to physical space?
From 2 comments
So, how does it get mapped to physical space then? As long as I am in "rssi tuple" space, I maybe know if I am in a place where I have been before, and I can learn the topology…
konschubert on HN>So, how does it get mapped to physical space then? don't quote me but i don't think it does. you basically go around and set up hotspots in rssi space that the server knows…
mlevental on HN
Is the public server safe to use with personal data?
From 1 comment
The byline says "High-precision" but I could not find any benchmarks or scientific analysis. What does high precision mean here? How stable is it? What about privacy of the…
llao on HN
Alternatives named
Round-trip time (RTT) positioning with 802.11mc
From 2 comments
> ...it requires triangulation + accurate timestamps... This system does not do round-trip time measurements (RTT) which I believe you are referring. RTT is different because it…
qrv3w on HNYes you can do that but that runs up against the problem of "processing time" in the router. A router might process a simple echo request for +/- 1 millisecond. Since 1…
qrv3w on HN
Google location via WiFi access points
From 1 comment
Just check out https://developers.google.com/maps/documentation/geolocation/intro#wifi_access_point_object Feeding it with BSSIDs and RSSI, it gives you a precise response with…
sylwester on HN
Mozilla Location Service
From 1 comment
There's also Mozilla Location Service – https://location.services.mozilla.com/ > […] an open service which lets devices determine their location based on network infrastructure…
helb on HN