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New perspectives to save cultural heritage
Altan, M. Orhan

CIPA 2003 XIX th International Symposium, 30 September - 04 October, 2003, Antalya, Turkey
be carried on during this process: creating the spatial objects,
in AutoCAD and defining the attribute data concerning each
spatial object.
1929 cadastral plans that have been updated during the site
survey are used as the reference base map. The spatial objects
are digitized in AutoCAD R.14 and transferred into ArcView
3.2. During the vectorization of the drawings in AutoCAD,
layers are produced in point, line or polygon format defining
the type of the spatial objects after they are transferred into
GIS media. The items, which are preferred to represent their
existence with reference to their location only, have been
showed in “points” such as architectural elements (i.e., door,
window, fireplace, cupboard, etc); street elements (i.e.,
electric box, firehose, telephone post, etc.) and environmental
features (i.e., tree, viewpoints, etc.). Features that have length
are represented in “lines”, such as topographical lines,
pedestrian-vehicular traffic direction, etc. Items having
boundaries and representing an area have been described in
“areas” such as building block, building lot, building, space
(room), etc. They are represented as closed polygons. Every
single layer that has been used in AutoCAD is defined with
spatial data and the types of spatial object class for each title
is established. (Figure 1)
Figure 1. Created spatial objects through AutoCAD
At the second phase, the collected data through survey sheets
are classified into meaningful data groups so that they would
be handled during the further phases as well. According to
the topics that would be necessary for the analyses and
evaluation stages, thematic clusters of spatial objects and
attribute data have been established. (Appendix I)
During this process content of each group has been studied in
detail by establishing typological sub-groups according to the
evaluation of collected data by survey forms. Afterwards,
they are defined with a code number or code title so as to be
recorded into the system according to the format of designed
database. A descriptive legend and typological drawings
explaining the detailed properties and coding system of all
groups have been finalized with the same manner. By this
way the structure of an utilizable documentation system has
been established for the record of collected data. (Appendix
Data Entry: Different data types coming from different
sources have been entered into the system in the form of a
relational database. At that point, a coding system giving an
ID number for each spatial object has been established so as
to define the relevant relational structure among the data
Coding System: A_0001 _a_01 _01
According to this coding system, ID of the block, lot number,
dwelling number, ID of the space (room) and ID of the
architectural element are indicated respectively.
Fields are defined which refer to different aspects of the
spatial object and attribute data entry is made for each of the
spatial object as different records in the table accordingly. As
the attribute data is connected to the spatial data, by clicking
onto each map feature, the attached attribute data could be
seen. (Figure 2)
The visual data collected from different sources, including
aerial photograph of Antakya, cadastral maps, conservation
maps and historical map-sketches that have been prepared by
the travellers who have visited Antakya during late 19 Ih and
early 20 lh centuries, maps prepared during 1930s showing the
districts with important monuments-streets, ethnic structure
of the neighborhoods of Antakya, have been converted into
digital format
All these materials have been transferred into GIS either by
using geographical coordinates of the system or by aligning
according to the selected common fix points, and thus,
georeferenced raster images are provided. Since the historical
maps haven’t been produced according to the rules of the
coordinate system of contemporary maps, their overlay with
the existing maps was not precise.
Other visual data such as old and new photographs from the
city and Zenginler District as well as engravings produced by
the travellers have been scanned and converted into JPG files.
They are attached to the related spatial objects using the
hyperlinking property of GIS. Thus, by clicking onto related
map feature, the linked visual data could be visualized as
well. (Figure 3)
Figure 3. Attachment of JPG files