7th EC-GIS Workshop Potsdam, 14.06.2001

IfgiInstitute for Geoinformatics

7th EC-GIS WorkshopPotsdam, 14.06.2001

Optimization of field data management using mobile GIS, wireless technologies, distributed simulation-, and visualization systems Ingo Simonis (Institute for Geoinformatics, Münster)


• Current situation of data acquisition

• Mobile Communication

• High Level Architecture – HLA

• Momeno-Project

• Outlook

Agenda


Field data acquisition

SituationData acquisition and processing are two

distinct processes


Current Situation

SituationData acquisition and processing are two

distinct processes

Time consuming

Expensive


Requirements

SituationWhat is needed?

• User does the data acquisition in the

field


Requirements


• User takes the data acquisition in the

field

• User defines the required type of

processing


Requirements



field


processing

• User sends the data to a remote

system


Requirements



field


processing

• User sends the data to a remote

system

• Processed data will be sent back to

the user


Solution

Situation

Mobile Communication

Distributed simulation andvisualization capabilities

High Level Architecture

How to achieve this goal?


Solution

Situation






Technologies

MobileCommunication • Telecommunication

• GSM

• HSCSD

• GPRS

• (UMTS)

• wireless LAN


Technologies III

Mobile Communicati

on• max 9.6 kbps

HSCSD: High Speed Circuit Switched Data

GSM: Global System for Mobile Communication

• based on a circuit-switched technology

• new channel coding scheme

(14.4 kbit/sec)

• allows up to four channels to be

combined: 57.6 kbit/sec

• high network capacity demanded


Technologies III

Mobile Communicati

on • no permanent link

• data is encapsulated in individual

packets

• “always on”

• transfer capacities are shared between

users of one cell

• theoretically 128 kbps

UMTS: Universal Mobile Telecommunication

Standard

GPRS: General Packet Radio Service

•up to 2mbps (practically <800kbps)

• not before 2003


wireless LAN

MobileCommunication • uses radio frequency technology (2.4GHz)

• Infrastructure:

Server

http

APmax 40km


wireless LAN

MobileCommunication Line of Sight

SendeturmAccessPoint

Sendeturm

PDA

Sendeturm

PDA


Transfer Rates

MobileCommunication

GSM GPRS HSCSD WLAN

9.6 < 30 < 40 > 10000 [kbps]


Solution

Situation








HLA• defines a framework for distributed

simulations




simulations

• Developed by the DMSO, under the

US Department of Defense




simulations



• IEEE-Standard (1516.1/2) for

interoperable simulation components




simulations



• IEEE-Standard (1516.1/2) for

interoperable simulation components

• Key feature: Separation of the

communication and the state space


Simulator

Architecture

HLA• Distributed simulations consist of any desired number of communicating and synchronized simulators or other components (=Federates)

F1 F2 F3 Fn. . .

• Interrelated Federates forming a distributed simulation (=Federation)

• All communication is done via the Runtime Infrastructure (=RTI)

Runtime Infrastructure

Simulator Sensor DisplaySimulator Sensor Live PlayerDisplaySimulator Sensor


Interoperability

HLAInteroperability is supported by:

1. Implementing well known interfaces

to communicate with the RTI. Due to the

restricted communication possibilities,

the interoperability within a federation is

guaranteed on a syntactical level.Federate

RTIAmbassador FedAmbassador

RTI

2. Every object type to be published or

accepted by a federate is documented in

a well defined way (based on the Object

Model Template). This helps to realize

a more semantic interoperability.


Project

MOMENOMobile Measurement Network Optimization

• Prototype

• Data acquisition, sending and receiving

• HLA: Distributed data interpolation and

visualization


Architecture

MOMENO

Federation

Federates

Federates

Interfaca to the RTI

Run-Time Interface

Receiver

Kriging

Webmapping-Server

Database

ArcSDE

Oracle Database

AccessPoint, connectedto the Internet, using atelephone connection

Visuali-zation


WindowsCE Client

MOMENO


To make the remote simulation plug &

playable…

OutlookWe have to achieve a high level of interoperability in the sense of OGC:

• Geo Federates

• To create an OMT compliant Geo Object Model, describing basic OGC Features (Simple Features, Coverage)

RootFederate

GeoFederate OGCSpecs


Thank you for your attention

7th EC-GIS Workshop Potsdam, 14.06.2001

Documents

Transcript of 7th EC-GIS Workshop Potsdam, 14.06.2001