Saturday, November 17, 2007

Building & Maintaining the LBS Data

Traditionally, location-based applications have included resource finders, roadside assistance, and asset tracking. Now, personal-locator applications are also gaining popularity. Their success is largely due to the early introduction of pure LBS devices like Global Positioning System (GPS) Locator with PDA, Cell phones and even wristwatches.

The two most prominent position-location technologies are cell-phone triangulation and the use of GPS satellites. Other emerging technologies include digital television (DTV), ultra wideband (UWB), and WLANs.

Spatial and locational intelligence is incorporated through attributes in topologically correct network dataset for LBS. These are;
Ø Basic attributes for GIS applications
Ø Advanced attributes for Routing
Ø Turn-by-turn features for guidance
LBS data is used in three basic types:
Ø National coverage
Ø Street Level data
Ø Demographic data
Pre-requisite:Geometry
Ø Geometry
Ø Features
Ø Basic topology

Pre-requisite:Basic Attributes
Ø Street names
Ø Land cover type
Ø Road classification

This information is sufficient to prepare low-end desktop and Internet GIS applications but not for advanced routing and transportation systems.

Advanced requirements
Advanced Attributes are required by routing applications with advanced speech enables PC and Internet applications. Introduction of Advanced Driver Assistance Systems (ADAS) will create demand for ultra-precise maps with new safety-related features and attributes.

Ø Near-term (2004-2006):
o Speed limit advisor
o Curve speed warning
o Stop sign warning
Ø Mid-term (2007-2011):
o Curve speed control
o Stop sign control
o Forward collision warning
o Lane departure warning
o Traffic signal warning


These features and attributes help in turn-by-turn navigation,
Ø In-car
Ø Though WAP/PDA
Ø Telematic service

The LBS datasets are organised and structured according to ISO TC-204-N-34, which ensures that they can be used with all advanced technology platforms.

LBS and GIS integrate one or more of the following technologies:
Ø Mobile devices
Ø Global Positioning Systems (GPS)
Ø Wireless communications for Internet GIS access


LBS MARKET IN INDIA
The global market for GPS devices is 10,000 crore. The Indian market is now at 50 crore, but it has potential to grow to 2,000 crore in the next three to four years.

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