Nao Cloud quick start guide

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How to create a Fingerprint-Positioning database?

Quick Start Guide

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2 simple steps. Nothing complicated.

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Step 1, build a model of your building. 2 things needed.

Floor plans in image format,

and knowing the walking paths.

You will be asked to draw them on the floor plans.

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Step 2, go for a little walk along the paths you’ve drawn

with our setup mobile application in your hand.

It will collect data along the way,and then generate a Positioning Databasethat will be used by our Location Engine

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First things first, let’s click on the red button to get started !

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type the address of the building and look for it on the map.

A new page opened with a form and a world map,

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Center and zoom on the building on the map.

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Submit necessary information

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Next, upload the floor plans

You can drag and drop several files at a time.

But one file per floor please.

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Indicate the floor level numbers and give them some names…

…then click here to continue…

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Next we gonna align the floor plans to the building footprint on the map.

Just some scaling and rotating. No big deal, right?

Note: A video tutorial is also available on the page

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It looks like this when the page opens

transparency rotating

scaling

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transparency at 70%

perfectly aligned

It looks like this after few adjustments

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Repeat the operation for each floor…

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…or we can apply the same alignment to all floors in one click.

Of course only if all the floor plans have the same dimensions (image width and height)

use this button

this is the floor selector

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Click on Save and Next, and we are now at the final stage of the first step :

You know MS Paint? Our tool is simpler.A video tutorial is also available on the page.

Drawing the walking paths on the floor plans.

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Just draw where people can walk. 1 line per corridor. No sweat, right?

the mouse pointer is here, about to connect the red node with the green one

corridorsare in blue

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Don’t forget to link floors

if you have escalators, stairs, elevators.

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1 click. Draw a node on a floor2 click. Change floor with the floor selector3 click. Draw the second node on the new floor.

Q: How?A: 3 clicks.

our lovely stairway

floor 1

floor 2

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Save the drawing and we are half way.

Venue modeling done. Data collection to do.

We call this fingerprinting

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A: Fingerprinting means mapping out sensor values (e.g. Wi-Fi power levels) throughout the building, and build a fingerprint database.

We call this Positioning Database or PDB

Q: Wait, what exactly does Fingerprinting mean?

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A: The software looks-up real time sensor information in the fingerprint database, and tries to find a good match.

Pretty much like how the police finds a person given his fingerprint found on a crime scene.

Q: How does Fingerprint-based positioning work?

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So what we are trying to do here is to create a positioning database…

…that contains sensory information of every place on the walking paths

and will be used in real-time by our positioning algorithm in the SDK.

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Q: How?

A: Pretty simple too!

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You’ll walk along the walking paths you’ve drawn

with your smartphone on your hand

and our setup mobile app running on it

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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 Fingerprint-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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You understand the principles. You’ll see, it’s really easy.

I’ll stop at this level of explanation becausewe have a dedicated tutorial on the data collection page.

Make sure you follow its tips and advicesto produce best quality positioning databases.

Useful advices likewhich phone to use, which walking pace,

and more….

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Now once you’ve done the not-that-hard work,

It’s time to see the results.

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Switch to the Demo Mode in the application, let the system do the magic tricks.

You are now located by the app but this is based on sensors on the phone and not

ALE generated locations.the blue dot shows your location

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This deployment process can be repeated over and overuntil you are satisfied with the accuracy and coverage.

On NAO Cloud platform, you’ll find tools to monitorpositioning quality with accurate indicators.

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Just note that every time you change floor plans or walkable paths,the fingerprinting data will be obsolete.

An other data collection session will be required.

So make sure your model is correct before the fingerprinting step.

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That’s it! Congratulations.

You can publish this Fingerprint-Positioning database to calibrate the ALE location

engine.