a localized landmark model based on osm data for socialized landmark based navigation system...
TRANSCRIPT
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A Localized Landmark model based on OSM data for Socialized Landmark based
Navigation System
Dhanajaya Thathsara, Pasindu Chandrasekara, Thejaka Mahaulpatha, Irendra Janithra, Nimalika Fernando
Sri Lanka Institute of Information Technology, Sri Lanka
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Motivation
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Regular societal practice Vs guidance given by navigation aids
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Anything missing?
• Navigation tool : “Turn slightly to left to 7.1 km to Anuradhapura –trincomalee road”
• In –person:“turn to left near Anuradhapura Junction, it’s a four way junction , there ‘s a big Na-tree towards left side , there’s a small tea shop too, you will not miss it “
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Landmarks for path planning for local context
Source: http://www.sundaytimes.lk/130120/news/people-power-saves-dambadeniya-era-geta-kumbuk-from-the-electric-saw-29536.html
Source: http://www.greatmirror.com/index.cfm?navid=982
Sri Lanka – strong cultural and social significance for landmarks
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How to model landmarks ?
• Significance of landmarks– Prominence – Familiarity/Social background– Age– Day /night/ seasonal visibility– ….
• Point Location + attributes
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Attributes • Height• Spread• Day/Night visibility• Social significance• Cultural significance• Age group• Seasonal factors • …..
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Height
TallMediumShort
Image Source: http://www.panoramio.com/photo/52483667
Khan clock tower, Colombo, Sri Lanka
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Day/Night Visibility
Source : http://www.mygola.com/akkaraipattu-d1122069/temple
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DayNightBoth
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Cultural Significance
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Place of worship: BuddhismPlace of worship: MuslimPlace of worship: HinduPlace of worship: ChristianStatue: BuddhismTree : Religious
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Social Significance
Amenity: Restaurant
Amenity: place of
hangout
Amenity: Shopping
complex http://imagessrilanka.blogspot.kr/search/label/Banana-leaf
%20shaped%20bus%20halt%20shelter
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Represent landmarks in GIS• Follow the OSM tag system• Use existing tags where possible • Introduce new tags to represent local
landmarks
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Amenity: place of worship
Building: yes
Building: home
Amenity: atm
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<node id="64638681" version="4" timestamp="2013-08-05T17:20:27Z" uid="1294392" user="lkmapper" changeset="17230788" lat="6.0494692" lon="80.2151194"> <tag k="amenity" v="school"/> <tag k="name" v="Mahinda College"/> <tag k="opening_hours" v="Mo-Fr 07:30-13:30"/> <tag k="url" v="http://www.mahindacollege.lk"/></node>
<node id="64638681" version=“1" timestamp="2013-04-11T07:20:30Z" uid="1294" user=“Pasindu" changeset="17230790" lat="6.1432876" lon="80.5678980"> <tag k=“place of worship" v=“buddhism"/> <tag k=“statue" v=“yes"/></node>
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How to collect landmarks?
• Landmarks are social concepts• Better let community collect them• Social application
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Social application for landmark collection
• User registration• Add friends/ groups• Add, edit landmarks• Search people based
on proximity• Path planning based
on landmarks17/09/2015
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Our final Solution
• Localized Landmark ModelStore Landmarks
• Landmark based path planning
Use landmarks to aid navigation
• Linear MapClutter Free Map
• VGI & Geo-SocializingCollect Landmarks
Landmark based Mobile Navigation
Application
Cross -platform
FOSS based
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Acknowledgement & Credits
• The participation at FOSS4G is supported by a travel grant.
• This is a study initiated by Geo-informatics research group & OSGeoLab of SLIIT and now being supported by a SLIIT Research Grant.
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