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Geospatial World Forum Hyderabad 21/01/11. An Example Of A Tourist Location Based Service (Lbs) With Open Source Software. M. Deidda, A. Pala, G. Vacca University of Cagliari, ITALY DISIG Department of Structural Engineering, Infrastructural and Geomatic [email protected]
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M. Deidda, A. Pala, G. Vacca
University of Cagliari, ITALY
DISIG Department of Structural Engineering, Infrastructural and Geomatic
“Great Wall” Chinese Restaurant
Silk Road, 45
Base station distance 100m – 35 Km
0.009 - 0.014
~900 MHz, licensed Spectrum
~2.4 & 5 GHz, not licensed Spectrum
~2.4 GHz, not licensed Spectrum
1-1.5 m needs line of sight
1 - 16
not licensed Spectrum
Geospatial World Forum Hyderabad 21/01/11Communication Network
The OpenLS Standard
The receivers used in the test are the following:
• HP iPAQ hw6915: HSGPS, 12 channels.
• GeoXT, Trimble L1, 12 channels
• Juno, Trimble L1, 12 channels
The charts show the frequency histograms, where the ordinates correspond to the percentage of acquired GPS position within the following accuracy ranges:
In the Info-tourist LBS developed, the client sends its position and asks to the LBS server the information on the closest tourist point. In OpenLS terms this means to make a ReverseGeocode operation.
The answer is displayed on the mobile device together with a map coming from the WMS and WFS Services
THE LBS SERVER
Originally in the Roma40 national reference system, it was converted to geographic coordinates in the ETRF89 reference system.
Geospatial World Forum Hyderabad 21/01/11The Map
URL of a picture
URL of a Website
Geospatial World Forum Hyderabad 21/01/11The Database
The research group is now implementing new functions; in particular, we are now studying the Route Service in order to calculate the route from the user’s current location to a requested point of interest.
The next step will be to develop a client also for Apple devices like IPhone and Ipad.
Geospatial World Forum Hyderabad 21/01/11Conclusions
Low cost GPS
(DGPS or stand-alone mode)