THE COST ANALYSIS OF SATELLITE IMAGES FOR USING IN GIS BY THE PERT
T. Cay *, F. Iscan *, S.S. Durduran
? Selcuk University, Engineering and Architecture Faculty, Geodesy and Photogrammetry Department, 42075 Konya, TURKEY —
( tcay, fiscan, durduran)@selcuk.edu.tr
Commission IV, WG IV/5
KEYWORD: Satellite, Image, Analysis, GIS, Data, Cost, Planning
ABSTRACT:
The method of collecting, saving, storing of geographical information with and without a location on the earth, the other data related
to these information, and to get the result in the quickest way by means of analyzing them through a security can be managed by
Geographical Information System (GIS).
The important one of the basic elements of Geographical Information System comes firstly DATA. In collecting data there are
various methods of them, GPS or classical measurement, Aerial Photographs, Satellite Images and Digitizing of Map and
Documentary are the principle methods. The cost calculation of the provision of satellite images by evaluating through Image
Processing is a determinant critical point in the selecting of the method of data collection up to the stage of using them as a cadastral
map for the Geographical Information System.
In this study, in selecting of Satellite Images that is one of the methods of collecting data in order to be cadastral map for the
Geographical Information System, the result of cost analysis carried out by the Method of Program Evaluation and Review
Techniques (PERT) will be introduced.
1. INTRODUCTION That the data are correct, actual and reliable constitutes 80% of
the basis. This percentage shows how important selecting of
The Geographic Information System ( GIS ) is a relatively new data collecting methods are.
technology that joins the computer science advantages with the
modern systems of capture of data so that it will allow the In GIS data have been obtained from different resources by
integration and the treatment of all types of information of a using software, hardware and technology (Figure 1).
computer team, in a simple way on the part of any user that
requires to work with this information( Duran and Toz, 2002). Since geographical data cover a huge place, collecting and
evaluating of data are both expensive and time consuming
A working GIS integrates five key components: hardware, (Magure et.al., 1991).
software, data, people, and methods.
| Data Collecting Methods
‘ ID : Y
Surveying Methods] Satellite Image Cartographic Photogrammetric Existing Written Other
Study Method Information Information
Y 2
Digitisation of Maps and - Digital Maps: Register Data Other Data
imi Pans...
j
“Vector
nier HE a
Y
Transformations of Coordinates and Cleaning and Classification
Format
Figure 1. Methods of collecting data in GIS
358
Interne
Satelli
inform
is appt
point
satellit
The
consec
consid
- from
resolu!
- from
resolu
- simu
- radk
the usi
- pancl
The t:
proper
air ph
inform
( Ross
Aerial
impor
Photo;
Accor
collect
how it
Satelli
photo:
usuall
1/100
1/250(
been
(Figur
In this
can be
done i
High
achie
aerial
