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Show HN: Indoor Location you can try yourself

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Re: Show HN: Indoor Location you can try yourself

#32

Post by navpatel »

pdx wrote: post #6

Error reading floorplan There was an error reading your floorplan from storage Nexus 1, trying Windows7 Paint generated .png and .jpg

Does it work if you try again? Looks like this is an issue with mod_python, which cannot accept chunked encoding (https://issues.apache.org/jira/browse/MODPYTHON-222)

We’re not sure under what conditions the client decides to send chunked vs not, but in our testing if you retry it should get through.

Re: Show HN: Indoor Location you can try yourself

#34

Post by navpatel »

untog wrote: post #21
navpatel wrote: post #9

Earlier quoted context omitted.

It will work wherever there are ambient WiFi signals, indoors or outdoors. This is particularly interesting indoors because it’s possible to get GPS outdoors, while you can’t indoors. We have tried mapping around Mountain View and it’s worked great

My specific use case is in tracking very small movements, i.e. ones that a GPS would not pick up. I was wondering if this would provide a solution to that, but it still seems to have a delay attached. Doesn't take away from some very impressive tech on display. Kudos.

thanks! How small are the movements you’re trying to track? And what kind of time delays are you trying to get under? You can try mapping the same location multiple times (the more mapping the more accurate our system will be)

Re: Show HN: Indoor Location you can try yourself

#35

Post by navpatel »

playeren wrote: post #26
jdhuang wrote: post #18

Earlier quoted context omitted.

It's actually based on the ambient Wi-Fi signature of the airwaves around you. There is no image recognition involved!

Ah ok, so the *floorplan you supply just acts as a "background/walking-guide" for your mapping?

yup, that's right

Re: Show HN: Indoor Location you can try yourself

#36

Post by darintay »

nantes wrote: post #31

Crashes on startup. HTC Evo V 4G, Android 4.0.3. Reported via Google Play.

Thanks for the report and sorry about the crash!

Any chance your sdcard/external storage is mounted or otherwise unavailable? We're supposed to have a popup to prompt you for that, but it looks like some code slipped in before the prompt :(.

Re: Show HN: Indoor Location you can try yourself

#37

Post by playeren »

navpatel wrote: post #35
playeren wrote: post #26

Earlier quoted context omitted.

Ah ok, so the *floorplan you supply just acts as a "background/walking-guide" for your mapping?

yup, that's right

Ok, thanks. Was looking for a img rec lib for floorplan drawings when I fell upon your post - hence the question.

Re: Show HN: Indoor Location you can try yourself

#38

Post by navpatel »

philip1209 wrote: post #33

Aisle 411 is doing indoor location: http://aisle411.com/

Yeah, Aisle411 is definitely doing some cool stuff with indoor location, and are the types of partners that make a lot of sense for us. Indoor location is made up of two key components: Real-time positioning (e.g. WiFiSLAM) and point-of-interest databases (e.g. Aisle411)

Re: Show HN: Indoor Location you can try yourself

#39

Post by groundshop »

jdhuang wrote: post #8
untog wrote: post #2

I'd love to know a little more about what's going on here. Does it use accelerometers or just wifi signals? One key question: could I share these floorplans? That is to say, using the sensors on HTC Android device #1, could I sent a floorplan to my friend Samsung device #2 and have them be able to similarly track their location? Does it only work indoors, or is that just for demonstration?

@untog: It's actually a sensor fusion approach that combines both accelerometers and Wi-Fi signals.

Can you guys give any insight into how you're combining the sensor data? I'm a newb on the topic, but I was trying to do something similar in a different domain and got stuck trying to make a kalman filter. I tried to get an EE friend to explain them to me, but I couldn't get it.

Re: Show HN: Indoor Location you can try yourself

#40

Post by 0x0 »

darintay wrote: post #5
untog wrote: post #2

I'd love to know a little more about what's going on here. Does it use accelerometers or just wifi signals? One key question: could I share these floorplans? That is to say, using the sensors on HTC Android device #1, could I sent a floorplan to my friend Samsung device #2 and have them be able to similarly track their location? Does it only work indoors, or is that just for demonstration?

The floorplans are definitely transferable! Once you’ve mapped a location once, it works automatically on all devices. In fact, if you walk into a location that someone else has already mapped, the “Where Am I” will automatically load that map up on your device and start showing your position. If you’d like to do more advanced stuff with your floorplans, make a WiFiSLAM SDK account here (access.wifislam.com) and we c…

What's in the SDK? I looked around and there was not even a mention of ios versus android. Is it a set of armv7 ndk android libraries? Or something else? Can I use it on simulators running on OS X?
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