International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, Vol XXXV, Part B2. Istanbul 2004
is
Figure 4. Server Sends the XML Document
The client uses Java-based parser to parse the document using a
schema developed specifically for this application. The contents
are extracted and display module uses an XSL to transform the
contents to suitable display form (Mohammadi H., 2004).
The new interface appears displaying the map and the tools
such as zoom, pan, full extent and best route. Each number key
on the mobile device sets the zoom to that number and the
arrow keys pan the map (Figure 5).
zoom to Z
Figure 5. Zooming and Panning with keyboard
Best route option creates a new interface to select two begin
and end cities and then the best route between two cities will be
presented on the map (Figure 6).
fé TT ,
FAN
Figure 6. Best Route Result (City of Ardebil to Esfahan)
696
5. CONCLUSIONS
The topic of this paper is one of the most important and
considerable issue in GIS discipline. The paper focuses on geo-
data component of wireless GIS. The major objectives of the
research were to deal with data transfer and data interpretation
in wireless GISs.
Many spatial data formats has been investigated and XML has
been found as an appropriate Meta language to transfer and
handle the data in Web and wireless environments. XML
provides a text-based and platform independent structure for
data.
As a conclusion web and wireless environments, regarding to
their ubiquitous characteristics, makes more benefits for the
users in contrast with stand-alone systems. More users, free or
low price geo-data and GIS services and ubiquitous character of
the systems are the most important advantages. These systems,
in spite of the benefits, make more problems and challenges for
the developers. Distributing and sharing the data and services,
handling parallel requests, handling data in Internet
environment must be addressed. Applying thick client
architecture for client/server transaction and XML data format
for transferring geo-data can help to solve these obstacles.
: 6. REFERENCES
Dell 3; Loton T; Allamaraju S., Dalton S., Brown S.
Harbourne- Thomas A., Holm B., Kunnumpurath M. M., Li S. ;
2002, Professional Java Servlets 2.3, wrox Publication.
Extensible Markup Language (XML) 10, W3C
Recommendation, February 1998, at URL address:
http://www.w3.org/TR/1998/REC-xml-19980210.
Garmash, Artem, 2001. A geographic XML-based format for
the mobile environment. Paper in Hawaii International
Conference on System Sciences, HICSS-34, Hawaii, January 3-
6.
Mohammadi H. , Feb.2004, Design and Implementation of
Object-based GIS on the Internet and wireless Network, Thesis
Submitted in Partial fulfillment of the requirement for the
degree of Master of Science, K.N. Toosi University of
Technology, Geodesy and Geomatics Engineering Faculty, GIS
Department, Tehran.
Takino Shuichi, 2001, “GIS ON THE FLY” TO REALIZE
WIRELESS GIS NETWORK BY JAVA MOBILE PHONE,
International Symposium on Asia GIS.
* Dej
e St
KEY \
ABSTI
It is no
differei
landus:
general
landus
trajectc
because
relative
classifi
change
not sho
Land c
econon
2002).
domina
signific
activitic
When 1
three as
1998):
* are
ch:
e thc
of
* Sp
an
Numerc
1998, N
al 200
imagery
ETM, S
commoi
(Prakas|
Mertens
Xiao 2C
resolutic
discrimi
work ha
* Com
