International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, Vol XXXV, Part B-YF. Istanbul 2004 
e Capable data structure that recognize different raw 
data formats, 
e Creating a data processing system that exchange 
different data formats into one format, 
e Creating an Interactive web-map on the fly with the 
processed data, 
e Creating a reporting system that produces reports 
based on user specified parameters. 
The benefits of having such a system are; 
e Reducing monitoring costs, 
e [Improving the speed of decision making by 
supporting the decision-makers with real time 
information, 
e Ability to access by everyone and everywhere over 
the internet, 
e Reducing time and minimizing effort to reach data, 
e High speed, security and high rate of error handling 
with new internet technologies, 
e Centralized database that provides a single source of 
common information providing standardization, and 
faster retrieval and selective modification of 
information (Montgomery, 1993), 
e Ability to produce reports based on user specified 
parameters. 
2. METHODOLOGY AND THE DATA USED 
2.1 The Study Area 
The study area covers all the provinces of Turkey. Data 
collected from 1038 meteorological stations located in 81 
provinces and 957 districts where weather data, have been 
collected and recorded since 1929 (Figure 1). 
  
® Provincies 
® Districts 
Figure 1. The Study Area (location of the meteorological 
stations) 
2.2 Materials and Methods 
2.2.1 Data Used: 
The data used in the system can be grouped according to their 
sources. ; 
The data obtained the meteorological stations as given include 
(Figure 2); 
e Data structure information, 
e Station identification, 
e Data time information, 
e Meteorological information. 
The data reserved by the server consist of; 
e Province information, 
® District information, 
e Station information with: 
= Station coordinate, 
= Station administrator information, 
» Station data type information. 
The data used in the system can also be grouped by its contents 
as weather related and non-weather related data. 
Weather data used in the system consist of: 
e Surface temperature information, 
o Surface wind information, 
e Rainfall data. 
Non-weather data used in the system include; 
® Province information, 
e District information, 
e Station information with: 
e Data time information. 
   
   
Data struckins infoemabon 
Staten inima 
Date irdomseor 
  
E J Time information 
Surtæce Temperature 
2. WÁnd information 
1 Rainial information 
Figure 2. An Example for Station-Based Data Formats 
2.3 Technology Used 
Like most of the internet applications, web-based GIS are based 
on the simple server/client model. In a server/client system a 
computer acts as a client that sends requests to the server 
computer, the server computer processes the requests, and then 
sends the results back to the client (Kim, 1998). 
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