Transcript PROBLEM DEFINE

Development of Location Based
Emergency Services
Presented by :
FTMK GIS Group
Introduction
The recent convergence of Internet, wireless
communications, mobile positioning and
geographic information systems (GIS) leads to a
new class of location based applications and
services.
LBS are services accessibility with mobile device
through the mobile network and utilizing the
ability to make use of the location of terminals.
Problem Defined
►The main problem is : different PDAs with the different
OS is not compatible with the current system.
There are some different Web mapping/LBS software packages
or solution provided by different GIS vendor. E.g. ArcIMS
ArcPad, MapInfo MapXtream etc..(the propritery LBS
application are limited application level:limited
their
own corporate network and developing language)
►hardware (PDAs) constrains such as low processor speed,
small memory space and wireless networks constrains which
is network congestion makes harder to get connected and the
physical obstacles between terminal and base station brings
to frequent “connection lost”status.
► A small display window limits the extent and amount of
detail that can be represent in a single field of view. Limited
display- geographical images can be hardly slowed.
Objective
To develop a prototype of location-based emergency
online information service targeting patients and the public
in general (with different content for different user roles).
To develop a multi platform or interoperable GIS based
location information enquiry system software.
To allow system work in all available PDA’s technologies
on all OS.
Future LBS Expectation
Project Significant
To access geospatial data and location based
services operated in any type of operating
system in different PDAs.
Why XML?
The XML is the best way to define standards
for modelling, transport, storage cartographic
data and its representation.
XML is used to improve interoperability.
Interoperability means what a client can
request a distributed data, stored in different
formats.
SVG
The W3C standard format for vectorial image
is the Scalable Vector Graphics (SVG).
SVG is a language for describing twodimensional graphics and graphical
applications in XML.
It works directly within the Web browser:
requires a SVG plug-in (free from Adobe or
other vendors).
System Implementation
Hardware:
 Notebooks (Web Server)
 PDA (Clients + Wi-Fi compact flash card)
 GPS ( build in for Pocket PC or with serial cables)
 Wireless Access Point + Wifi
Software:
 Server-side:





Apache – web server
PHP - based compliant web map server is set up in my laptop
as localhost server.
MySQL - database
phpMyAdmin-used to manager the database.
PHPMyWMS -is an open source based WMS compliant web
map server, using PHP technology.
 Client-side:


IE / Opera browser
Java
Architecture
GPS
Receiver
Coordinate
translate
Internet
a)
Request services
(Web server
b)
Position information
http:// )
Generate SVG Map
Shape file
GML
PDA ( Pocket PC & Palm OS )
a)
(User Interface)
PDA ( Pocket PC & Palm OS )
Response POI (hospital)
a)
Response services
b)
SVG Map + POI + shortest
path
a)
Request POI (hospital)
b)
Position information
POI
Database
(SVG Map Viewer)
Client
Server
Data Conversion
ESRI Shape file
GML (XML)
SVG
Concluding Remarks
It is difficult to implement rich and complicated functions
on those mobile terminals as implemented on PC, “but
XML is the best solution for this research because it can be
presented in the different ways for different needs on
different platform”. In order to be independent of the
Operating System of the mobile devices, Java will be use
as a programming language.
In addition, more important outcome discussed in this
research is that integrated GIS services can be supplied to
different type of PDA and it’s “operating system in realtime basis”.
THANK YOU