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Title
New perspectives to save cultural heritage
Author
Altan, M. Orhan

CI PA 2003 XIX"' International Symposium, 30 September - 04 October, 2003, Antalya, Turkey
with software or hardware technology but also with properly
organized data (URL-1, 2003).
Prior to establishing a IHA database, it is necessary to perform
a feasibility analysis. After determining differences between
new IHA and classical system, the advantages of IHA database
should also be determined. As regards graphical data in the
system currently in use: firstly movable or immovable assets
related with IHA project are determined. It is determined that
these assets can be regarded as historical asset or not. For the
assets considered to be historical, provisions stated in the
regulation are provided. Second stage is registration process.
Realizing registration process is based on performing property
registrations in the region in question. However, cadastral
survey has not been completed yet, especially in outside the
residential areas.
2.2 General Structure of HAIS
Databases that belong to IHAs will be regulated respect to
province based. Directorships of the Cultural and Natural
Conservation Committees will constitute province databases
under their responsibility. Designed respect to Directorships of
the Cultural and Natural Conservation Committees, TTE
Information Systems are seen in Figure 1. The system is divided
into two main categories. These are graphical and non-graphical
data. Graphical data is divided into two parts as interior and
exterior layer. Exterior layers are cadastral maps, current base
maps, land development plans, aerial photographs, remotely
sensed images and standardized topographic maps. Because,
cadastral maps and land development plans are changeable and
they are used in registration and conservation processes,
cadastre and municipality intuitions and Directorships of
Cultural and Natural Conservation Committees, updating these
data, should communicate online. The other data can be
acquired in specific time periods. More detailed construction on
exterior layers can also be realized. Especially, among
Directorships of Cultural and Natural Conservation
Committees, cadastre, municipality and governorship, a
structure could be developed to data exchange.
Figure 1. General structure of an IHA information system
Interior graphic data are conservation areas, cultural and natural
entities and re-survey documents. Positions of conservation
areas and cultural and natural entities are specified via exterior
layers explained above. IHAs are positioned on a map in the
scale of 1/1000 where cadastral and current topographical maps
exist. If cadastral and current maps are on paper, these are
firstly digitized via digitizing process. Determination and
registration of IHA in such areas are easy. However,
determining and positioning on maps of IHA are very difficult
and positional accuracy is not enough in classical ways in
places where cadastral and current maps are non-exist. In such
areas, the location of IHA is positioned manually on a Standard
Topographical Map (STM) scaled as 1/25000. On the STM on
which conservation areas are positioned, querying and
analyzing of cadastral parcels could not be needed position
accuracy. In this areas where producing of their current maps
could not be possible in short time, it should be used different
data acquisition methods. Firstly, aerial photos or remotely
sensed data in high resolution should be used. If that is also not
possible, position data of TTE should be acquired with GPS.
Re-surveys should be transferred to digital environment via
softwares enabling three dimensional map producing.
In a database designed respect to province, directorship and
nationwide, combination of data under the same coordinate
system is important. While STM is produced in 6° UTM
coordinate system, other used maps are produced in 3° UTM
coordinate system. In a region or nationwide database, spatial
data should be constituted in base maps having same coordinate
system. For this reason, 3° UTM coordinate system for province
base, 6° UTM coordinate system for region base and geographic
coordinate system for all country or Lambert Conform Conic
projection should be preferred.
The second part of IHA information system constitutes non-
graphical information which are inventory records, photo-video
image, legal procedures, archives information, specialist reports
and title records. While some of these information is related
with graphical information, the others are independent from
them. Non-graphical- information is stored in MS Access
Database using an interface prepared in Visual Basic
environment. Management of non-graphical information in this
database will be supplied with four modules. These are; data
entry, data manipulating, data querying-analyzing and
reporting.
2.3 HAIS Organizational Structure
IHA Information System will be managed from Information
Process Center constituted in Directorships of Cultural and
Natural Conservation Committees. Database was designed
respect to province based to access more rapidly to IHA
information and to provide control. Combining of provinces
will constitute directorships. By combining of directorships,
nationwide IHA Information System will be constituted in
general directorships. After acquiring nationwide data, it will be
presented to users on-line, in General Directorship of Cultural
and Natural Conservation Committee
3. TRABZON CITY IHA INFORMATION SYSTEM
Trabzon is a city on the Black Sea Cost in the northeast of
Turkey with the population of 150 thousands, and a history
which goes back to the 800 B.C (Trabzon Valiligi, 2002).
Trabzon city IHA information system is composed of two
categories. One of them is inner Trabzon City; the other is the
outer city. While 1/1000 scaled base maps are used in the inner
city, the outer city are mapped only on 1/25.000 - 1/100.000