mobile map

8/6/2019 Mobile Map

http://slidepdf.com/reader/full/mobile-map 1/25

Mobile Map

8/6/2019 Mobile Map


Abstract

� Communication support is a serious limitation for Latin American firefighterswhen they deal with emergency situations.

� The insufficient number of radio channels and the impossibility to deliver digital

information affect the time required to take control of an emergency, and also

affect the evolution of the crisis situation.

� Communication Solutions are expensive.� Mobile Map is a low-cost mobile collaborative application, which may be used

in emergency situations to overcome most of the firefighters¶ communication

problems.

� It allows ad hoc communication, decisions support and collaboration among

firefighters in the field using mobile devices.

8/6/2019 Mobile Map


Introduction

� Firefighters are typically volunteers in many Latin American countries.� No Salary .

� Less Support from governmental agencies .

� Carry a radio receiver/transmitter to receive a call to participate in

emergency relief operations .

� A special firefighting unit (Command Center) is in charge of delivering thealarms ,assigning resources to an emergency situation and coordinating the

response efforts.

� The firefighting community is composed of a command center and its

depending fire companies.

� Examples of urban emergencies are fires , car accidents, gas leakages,collapses, and chemical/water spills.

8/6/2019 Mobile Map


Limitation of Radio-based Communications

� Taking control of an urban emergency requires quick and accurateinformation about:

� The dangers of the situation

� The affected resources

� The emergency location & the surrounding key resources to inspect

and to use and� The status of the response process

� Digital representations of this information which cannot be delivered or

shared in a radio system.

� Another problem is insufficient number of channels available to support the

response processes.� Delay in receiving/sending the information.

� Disturbance in the Channel because of two messages in the same interval.

8/6/2019 Mobile Map


Mobile Map

� It help¶s overcome most of these limitations.

� Helps fire trucks to arrive quickly.

� Helps firemen to retrieve information on the go.

� Helps the firefighting organization to record/collect

information about the response process.

� Runs on handheld devices.

� Uses Wi-Fi and GSM networks.

� Also runs on laptops, netbooks etc.

8/6/2019 Mobile Map


Urban Emergency Process

8/6/2019 Mobile Map


Mobile Map: Front End Functionality

�Fig. a shows the MobileMap main user interface.

�Initially designed as a Geographic Information System(GIS).

�It is able to run on a handheld device, and it supports

the work of firefighters in the field (Fig.b).

�Allows firemen to ask for several types of geographic

information.

�Such information is stored locally in each device to

avoid using radio channels or the GSM network (for

cellular phones).

�Evolved towards the inclusion of communication and decision making support.

�Allows firefighters to interact with the command center using requests and

responses sent through the GSM network.

�Automatically creates M ANET in absence of GSM network in Field.

�M ANET allows firemen to access shared information ,deliver alarms or even

listen to voice messages on-demand, without interfering with the radio channels.

8/6/2019 Mobile Map


Mobile Map Main Menu

8/6/2019 Mobile Map


Navigation

�Mobile Map has pre-loaded maps of the city including several levels of zoom and

interest points.�The navigation mode helps firemen to retrieve the geographic information stored in

their mobile computing device.

�The navigation service allows firefighters to surf the maps in two ways: on-demand

or automatically.

8/6/2019 Mobile Map


Destination

�Mobile Map shows two arrows pointing from the user¶s current location: Black

and White.

�The black one indicates the direction in which the user (or fire truck) is moving.

�The white one shows the direction in which the user must move to get to the

destination point.

�This Functionality helps to arrive faster to the emergency site.

8/6/2019 Mobile Map


Distance

�This functionality computes the distance between two or more points chosen by

the user.

�The screen shows the segment as a black line on the map, and the calculated

distance is indicated in the upper-left corner of the user interface.

�Any decision that firemen can anticipate will contribute to reduce the time

required to control the emergency.

8/6/2019 Mobile Map


Information

8/6/2019 Mobile Map


My Current Location

� This function reloads the map and the information deployed on it, centering

the image on the user¶s current location.

8/6/2019 Mobile Map


Fire Trucks

� Deploys the current location of fire trucks attending each emergency

situation.

� Updates about Vehicle Location.

� Using GPS.

� Informs about the current location once it has changed in at least 100m.

� The handheld belonging to a truck stores the list of instruments tools

available in such vehicle to support emergency relief activities.

� This list is reported to the command center.

8/6/2019 Mobile Map


Mobile Map: Back End Functionality

� Mobile Map Basic Architecture

�Client-Server architecture.

�Command Center acts as Server and Client runs on Handheld Devices.

�The server mainly acts as information repository and deliverer.�It gets the information sent through the handheld devices (e.g. pictures

or maps) and delivers them to any user requesting them.

�Furthermore , a voice recorder processes, captures and stores , almost in real-time, the

voice messages delivered through the radio main channel.

The audio files are shared by the command center therefore they can

be retrieved by firemen or fire trucks.

8/6/2019 Mobile Map


Mobile Map Client Architecture

�Map class is in charge of retrieving the information from the local repository (e.g. maps and interest

points) and showing the map on the user interface.

�Fire Truck and Interest Point classes deploy information on the map.

�The map information is stored in Tiles, with the corresponding zoom level.

�Cache memory space to keep data and to provide a good performance to the application.�Proxy class is responsible for managing the information stored in XML files.

�Mailbox class implements an I/O buffer that allows the application to exchange files.

� Networking services helps in the sharing the files.

�Service Manager manages the invocations from/to remote nodes .

�Information Manager receives and delivers shared files.

�Users Manager manages reachable users and roles.

8/6/2019 Mobile Map


Management of graphical information

�Based on a matrix of four by four tiles.

�Each tile is a PNG file.

�Each zoom level has a particular set of tiles that are used to compose the maps.

�The cache class keeps the images in memory and uses a LRU (Least Recently

Used) policy to implement the tile replacement process.

8/6/2019 Mobile Map


Networking issues

� MobileMap has two processes to manage the networking issues

� GSM:� Allows exchange of information between a handheld device

and the command center.

� Pictures are sent from the emergency place to the command

center.

� The picture is serialized, transmitted through the network.� Wi-Fi network

� Used if the GSM network is not available.

� Provides services to support communication among firemen in

the field.

� Assigns an IP address to the handheld device.� This networking process detects peers at a one-hop of distance

and automatically forms a MANET.

8/6/2019 Mobile Map


8/6/2019 Mobile Map


Log file record and processing� The client and server components of MobileMap record a log file in a

distributed way.� Stores information related to interactions in which the node was involved

during the emergency.

� Information is stored in a local XML file, and it includes a timestamp for

each recorded interaction.

� The processing of the log file involves three steps� Information recording

� Integration and

� Analysis

� This will allow firemen to learn from past experiences and get lessons for

the future.

8/6/2019 Mobile Map


Implementation issues

� This application was developed using C# and the .NET Compact

Framework, version 3.5.� The tool is able to run on computing devices using WindowsXP or

Windows Mobile 5.0 or higher.

� Most of the supporting files, such as the users list of a MANET, are

represented as XML files.

� MobileMap has been used on PDAs, smart phones, netbooks and laptopswith MS Windows as operating system.

8/6/2019 Mobile Map


Result� The application helped to reduce the arrival time to the emergency sites

particularly in the periphery of the city, where the street names are usuallyunknown to the Fire truck Drivers.

� The improvement in the arrival time could make a great difference on the

consequences of many emergency situations.

� Decision makers in the command center just monitored the activities of the

firemen using MobileMap.� Number of exchanged messages was 30% lower than in similar

emergencies in which Mobile-Map was not used.

� Firemen felt more confident and safer knowing they were able to deliver a

general alarm through the application.

� The operational cost of this solution in Chile is about US$ 10 per fire truck per month, and US$ 50 for the command center per month, which is

acceptable for their budgets.

� It costs less for firemen as this application can be run on their mobile

phone.

� These solutions can provide communication support similar to the radiosystems, transmit digital information.

8/6/2019 Mobile Map


Conclusion� Mobile Map was initially designed to help firefighters to arrive faster to the

emergency site, to allow them to exchange digital information during

emergency response processes and to reduce the need for radiocommunication.

� The next steps in this initiative

� To evaluate MobileMap in daily emergencies, involving several fire

companies, using a more formal evaluation approach.

� The authors plan to spread this solution as much as possible to obtainfeedback from several sources. For example, the tool could be tested

in public health services.

� A long term goal of this initiative is to enhance MobileMap in order to

propose it as a replacement of the current radio systems.

� The authors think that advanced telecommunication networks such as LTE(Long Term Evolution), also known as 4G would allow MobileMap to

provide an improved support to firefighting.

8/6/2019 Mobile Map


� The Mobile Map Application helps the fireman in the emergencysituations.

� The application was mainly designed to reduce the time to reach the

emergency field. It can reduce more time if it includes information about

the routes on the map which are crowded or having more traffic in that

particular route and showing a route by which the Fire truck can reacheasily without getting struck in traffic.

� It needs assistance for the truck driver to operate this device. If it

recognizes voice transmission, then it can reduce the work of another

person.

� Live voice transmission in the field makes much easier to communicate between two firefighters than passing the messages through mailbox.

My Views : Mobile Map

8/6/2019 Mobile Map


THANK YOU

mobile map

Documents