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How to collect data to create Fingerprint-Positioning
database?
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You are halfway to setting up the Fingerprint-Positioning database for your site.
Venue modeling done. Data collection to do.
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The aim is to create a positioning database (PDB)
from the collected sensory data of the whole venue.
e.g : Wi-Fi
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For positioning on Android, existing Wi-Fi infrastructure can be used
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To collect measurements,
you’ll walk everywhere in the building
twice (forth, back, forth, back)
with our setup mobile app running on your smartphone
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The app displays the floor plans.
While walking, every once in a while, place a waypoint at your current location on the floor plans.
The system will associate the sensory data collected along the way with your locations and will generate a Positioning Database.
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A: When you…
Q: So when exactly do I have to place a waypoint at my current location on the floor plans?
stopwalking
change direction
are at a pathIntersection
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A: While still walking…
Q: And How?
2. Press the marker button
1. Drag to put the green dot on your current position
Here, I have walked all the dark green paths left the blue part to cover.
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Our setup mobile app is called NAO Logger,available on Google Play
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1. Authenticate yourself and set the Server URL to ALE2. Select your venue 3. Let it download itself0. Install then launch
NAO Logger
Then we arrive at the main screen…
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Number ofWi-Fi beacons detected
Start or stop collecting data
Downstairs maps
Level number
Synchronize datawith server
For data collection
For positioning testing
Path left to walk
Path already walked
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Now press Start
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The Start button changed to Stop
The Marker button appeared
The green dot should be your current locationwhen you press the
Marker button
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Now, imagine right now your are at Aand you want to collect data
from A to B
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2 markers now
1. Press Marker button to tell you are at A
2. Start walking toward B
3. While walking, drag the maps so that the green dot glides to B
4. When you arrive at B, press Marker a second time and continue walking toward another point
Note: no need to stop when pressingMarker button
A B
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The blue path is walked one way (A to B)
If you now collect data from B to A,the blue path will be entirely covered in green
A B
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Continue collecting data until all blue paths turn green.
Then press the Stop buttonto save the data
Note: You can use Stop / restart wheneveryou want to take a break.
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Do not forgot to collect data on floor transitions(stairs, escalators, elevators, etc)
A
B
1. Press Marker at A2. Take the stairs or escalators3. Press Downstairs button4. Press Marker at B
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Once all the walkable paths are green, press Synchronize to send
collected data to the server.
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Switch to the Demo Mode in the application, let the system download the Positioning Database.
You are now located by the app using but this is based on
sensors on the phone and not ALE generated locations.
the blue dot shows your location
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Now publish the Positioning database from Nao Cloud and ALE is ready to use it in calibration mode!