S. Bakici 3 *, B. Erkek a and Dr.Ô. Yildinm 3 
a General Directorate of Land Registry and Cadastre, Ankara, Turkey-(sbakici, berkek, omeryildirim)@tkgm.gov.tr 
Commission IV, WG IV/9 
KEY WORDS: Orthophoto Map, Accuracy, Cadastre, Fast Cadastre, Mobil Cadastre 
ABSTRACT 
Photogrammetric softwares , functions and applications were tremendously effected by developments of image proccessing 
technologies in past decades. One of the applications of photogrammetric softwares is digital orthophoto production. Most of 
orthophoto products are used of planning, monitoring, GIS application ,etc.. A digital orthophoto plays great important role to take 
fast decision. Especially to control activities in large areas and countywide. Besides this, according to parallel development image 
processing technologies, it is necessary to test an orthophoto for accuracy, cost and time consuming.lt is important to complete whole 
cadastral mapping and to fast renovation of cadastre for large countries, like us. To do that it can be a usefull way to use orthophotos 
for renovation, if the accuracy, applicable, reliable and cost of orthophoto is sufficient. So it can be called “fast cadastre” or 
“mobile cadastre”. This paper presents a test results by including geometric accuracy, cost of an orthophoto and required time to 
produce an orthophoto for large scale mapping. An investigation carried out especially for large scale cadastral mapping and 
cadastral renovation purposes. 
1.INTRODUCTION 
2. METHODOLOGY 
As a result of rapid changes and developments in the computer 
technology, the wide range of digital and verbal geographical 
products developed, the diversity of users’ expectations and 
needs, new technology-oriented expectations and new 
understandings brought by the process of adaptation to the 
European Union, General Directorate of Land Register and 
Cadastre (TKGM) is in a process of change, transformation and 
restructuring. 
All details which contained buildings roof edge, signalised 
check points in the project area were measured by tachometers . 
And co-ordinates of those details calculated in ED50 systems. 
After production of orthophotos according to different pixel size 
and dtm grid width some of buildings roof edge and signalised 
check points were measured on orthophotos by using 
conventional CAD software. Finally a comparison of those co 
ordinates were done as following ways; 
In an age where information and technology cross national 
borders, international standards and rules gain weight in every 
field. Industrial communities are reshaped on the basis of 
information technology and transform into an information 
community. Digital mapping, land register and cadastral data 
constitute a foundation for position-based information systems 
that concern a vast section of the nation. 
comparison of signalised check point, 
comparison of roof edge after shift movement according 
to ground, 
comparison of roof edge using two orthophotos covered 
same area, 
3. TEST AREA and WORK STEPS 
As a result of the reflection of developing “e” based 
technologies to our sector and entity, projects are also being 
carried out at our entity in relation to: 
1 .Completion of installation cadastre in three years, 
2. Cadastre Renovation, 
3. Extension of TAKBIS (Land Register and Cadastre Info 
System) 
4. Automation of the Land Register Archive system 
5. Establihment of CORS-TR 
6. Development of Turkish National Geographic Information 
System Infrastructure. 
Some of these projects are nearing the stage of conclusion and 
some others are yet in the stage of design. Orthophotos will play 
gerat important role to presentation of above project. Especially 
for cadastral renovation and as a level of Turkish National 
Geographic Information System Infrastructure. This paper 
present test results for cadastaral renowation. 
Chosen test area which contains rural area, high buildings and 
shanties covered by 8 black / white aerial photos in 1/4000 
scale. A RMK camera used for photo flight. All images were 
scanned in different pixel size (14,21,28 micron) by SCAI 
scanning device. Images quality and enhancements, required 
personnel and time taken into account during scanning 
producure. A block was configured for image orientation and 
further proccessing. PHODIS PAT software was used for aerial 
triangulation and measurements. Totally 6 signalised full 
control points and 5 signalized check points were used as 
additional measurements. All measurements adjusted by PATB- 
GPS sotware program using self calibration method, of course 
by eliminating blunders. According to known exterior 
orientation all models were prepared. Table 1 shows summary 
worksteps required times and Table 2 accuracy information up 
to controlling of models. 
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