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Table 1. Comparison 
  
  
  
  
Format Size (KByte) 
Shapefile 197 
GML 283 
SVG 219 
  
  
  
7. TRACKING A VEHICLE USING SVG 
A program is developed to display tracking points of a moving 
vehicle in Iranian roads, as an SVG program. A map of Iranian 
roads in the form of SVG graphics is launched in web 
environment. À program reads-a moving vehicle's position, in a 
known period and updates the position of vehicle on the map. 
1155 
and Spatial Information Sciences, Vol XXXV, Part B4. Istanbul 2004 
Using SVG simplifies showing any layers of spatial data in web 
and adding different functionalities and applications. Doing the 
same things, by using traditional Web-GIS technologies would 
cost a lot of time and skill, although the final result would not 
be as good as SVG. 
8. CONCLUSION 
Going toward XML technology and the GML in the world of 
geospatial data and also using SVG is a new approach that 
overcomes a lot of existing problems. Some of the perspectives 
that these new technologies show are: 
* XML is a new way to go toward interoperability. 
Then there is no need to use specific software for 
existing data. 
* XML simplifies data exchange. 
* GML as an XML-based language is a new approach 
for spatial data interoperability. 
"  GML can be regarded as a promising technology for 
spatial data transformation. 
= 
GML presents vector maps. These maps have better 
quality than those in raster image formats. 
9. REFERENCES 
Kim Larry, 2003, “the official xmlspy handbook”, Wiley. 
Lake Ron, 2000, “Making Maps with Geography Markup 
Language”. 
10. ACKNOWLEGEMENT 
Our best appreciation is dedicated to those who help us 
through implementing the programs and guide us to 
understand GML.