Bu

Building Location-Aware Appswith Open Source & Open Data

#openmaps

Matthew Smollinger@mattsmollinger

Chuck Greb@ecgreb

SXSW Interactive | 14 March 2015

Mapzen is an open source mapping lab building and supporting open data and software to promote a healthy mapping

ecosystem.

Skaffl is an EdTech company that specializes in mobile solutions for the K-12

market.

start where you are

Part 1: Overview

⇢ Location-aware apps

⇢ Open source and open data

Part 2: Maps

⇢ Raster tiles

⇢ Vector tiles

Part 3: Geolocation, Search & Routing

⇢ Location services

⇢ Geocoding

⇢ Navigation

Part 4: Beacons & BLE

⇢ Monitoring and ranging

⇢ Indoor positioning

Agenda

#openmaps

Part 1:Overview


#openmaps

3 kinds of location-aware apps

⇢ Mapping applications

⇢ Location-based apps

⇢ Apps with location-aware features

Location-Aware Apps

Mapping applications

Location-based apps

Wearable integration

Apps with location-aware features

Common features

⇢ Maps

⇢ Geolocation

⇢ Search

⇢ Navigation

Location-Aware Apps

Code

Open Source

Philosophy

Open Source

License

Open Source

Community

Open Source

Advantages

⇢ Transparency

⇢ Flexibility

⇢ Compatibility

⇢ Free!

Location-Aware Apps

Open source is not free like beer

Open Source

Open source is free like a puppy

Open Source

Availability & Access

Open Data

Reuse & Redistribution

Open Data

Universal Participation

Open Data

Open Knowledge Foundationhttps://okfn.org/

Open Data

https://okfn.org/

https://okfn.org/

OpenStreetMap (OSM)

⇢ Crowdsourced & public data

⇢ Local knowledge

⇢ Attribution

⇢ Share-alike

Open Data

#openmaps

Part 2:Maps

Datasource

Maps

Tiles

Maps

Raster Vector

256 x 256 pixels

Maps

Zoom level 0:1 tile for the world

Maps

Zoom level 1:4 tiles for the world

Maps

Zoom level 2:16 tiles for the world

Maps

# of tiles = 2z x 2z

Maps

http://tile.openstreetmap.org/8/58/105.pnghttp://tile.openstreetmap.org/14/3743/6745.png

Layers & Overlay

Maps

http://wiki.gis.com/wiki/index.php/Overlay



Maps

Style

Why open source maps?

⇢ Cost

⇢ Customization

⇢ Privacy & security

Maps

osmdroid

#openmaps

osmdroid

⇢ Android only

⇢ Raster tiles

⇢ Started in 2008

⇢ Based on Google Maps API v1

⇢ Online and offline tile sources

⇢ Icons, tracking, and shapes

Maps

Mapbox

#openmaps

Mapbox

⇢ iOS & Android SDKs

⇢ Raster & vector tiles

⇢ Simple integration with Mapbox tile server

⇢ Alternate tile servers also supported

Maps

OpenScienceMap

#openmaps

OpenScienceMap

⇢ Universität Bremen

⇢ Pure vector maps

⇢ Native rendering engine

⇢ Java wrapper

⇢ Objective-C translation

Maps

Tangram ES

#openmaps

Tangram ES

⇢ Embedded systems version of Tangram for web

⇢ Native C++ rendering library

⇢ iOS, Android, and Raspberry Pi

⇢ EARLY work in progress!

Maps

#openmaps

Demo:Maps

#openmaps

Part 3:Geolocation, Search & Routing

Geolocation

#openmaps

Location Services

Geolocation, Search & Routing

Location Providers

⇢ GPS

⇢ Wi-Fi

⇢ Cell network

⇢ Passive

⇢ Sensors

⇢ BLE


https://developers.google.com/events/io/sessions/325337477



Location Providers

⇢ GPS

⇢ Wi-Fi

⇢ Cell network

⇢ Passive

⇢ Sensors

Geolocation, Search & RoutingFused Location Provider (Android) &

CoreLocation (iOS)

One interface to rule them all.X

#openmaps

LOSTLocation Open Source TrackerLocation Open Source Tracker

Not all those who wander are lost.― J.R.R. Tolkien, The Fellowship of the Ring

LOST talks directly to the LocationManager

LOST

Optimizations

⇢ Frequency

⇢ Accuracy

⇢ Battery Life

LOST

Search

#openmaps

Geocoding:Real world address -> Lat/Lng


Reverse Geocoding:Lat/Lng -> Real world address


Geographic Search Engine

Pelias

Pelias

#openmaps

Pelias is a modular open-source geocoder built on top of ElasticSearch for fast geocoding.

Pelias

/suggest

The suggest endpoint provides a super-fast autocomplete. This API can be used to quickly find location names which BEGIN with the input text.

http://pelias.mapzen.com/suggest?input=big%20ben&lat=51.5&lon=-0.06

Pelias



/search

The search endpoint provides a full-text search. It will try to account for spelling mistakes and will search for your input at any position in the location name.

http://pelias.mapzen.com/search?input=shoreditch&lat=51.5&lon=-0.06

Pelias




/reverse

The reverse endpoint returns the nearest locations to your input lat/lon.

http://pelias.mapzen.com/reverse?lat=51.5&lon=-0.06

Pelias




Routing

#openmaps

Turn-By-Turn Navigation


Public Transit


Open Source Routing Machine (OSRM)

#openmaps

#openmaps

Demo:Geolocation, Search & Routing

#openmaps

Part 4:Beacons & BLE

Beacons are awesome!

⇢ How they work

⇢ Cool stuff you can do

⇢ Products and frameworks

⇢ Examples

Beacons & BLE

A (quick) Guide to BT4

⇢ Basically three protocols in one

⇢ Bluetooth Low Energy

⇢ Operates in Two modes - Advertise and Connect

⇢ Only advertise is required - connect support is

optional

Beacons

⇢ Beacons implement advertise only

⇢ Transmit at regular intervals

⇢ Simplification of the BLE implementation

⇢ Replaces MAC address with UUID

⇢ Major number is for grouping

⇢ Minor number is for individualization

Indoor Location

⇢ Several different ways to accomplish

⇢ Wifi Triangulation

⇢ Ultrasonic Location

⇢ BLE Triangulation

⇢ Wifi is lackluster for triangulation

⇢ Ultrasonic need custom hardware

⇢ BLE range is poor compared to wifi or ultrasound

Open Source Indoor Location

⇢ Currently in very early discussions in OSM

⇢ A few frameworks / attempts are being made:

⬝ Redpin

⬝ Cricket from MIT

⬝ iLocate

⬝ indoor.io

⇢ Needs more time to bake

⇢ In the mean time...

#openmaps

Demo:Beacons & BLE

Thanks!

#openmaps

Matthew Smollinger@mattsmollinger

Chuck Greb@ecgreb

http://sxsw.feedogo.com/fdbk.do?sid=IAP31861



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