b. topographic diagrams, produced by field surveying
methods, in digital form
c. existing reliable topographic diagrams
d. existing reliable cadastral maps, which have been
produced during related activities (i.e. Urban Planning
Implementation Acts etc).
The compilation of cadastral maps in rural areas will be
based, according to the terrain relief and the available
topographic diagrams, on a scale of 1:5.000, which can be
(alternatively):
a. photogrammetric diagrams in digital form
b. digital orthophotomaps
c. existing reliable topographic diagrams
d. existing reliable cadastral maps
The series 1:1.000 and 1:5.000 cover one third of the total
land surface of the country.
The cadastral maps of the rest of the areas will be based
on maps at a scale of 1:10.000 or 1:20.000.
The basic principle in the philosophy of the technical
specifications, which will govern the execution of the
cadastral work for the N.C., is the clear description and
objective moderation of the final product, not the
description of the methods to be used in its production. It
is the emphasis on product rather than method, which
contrasts with topographic surveying works in our country
at the present time (e.g. P.D. 696/74, various ministry
decisions etc). HEMCO has selected the degree of
accuracy and the content of the final cadastral diagrams,
entrusting to the responsible agency (private firm /
company / surveyor etc) the choice of the methods and
instrumentation to be used to achieve the desired results.
Naturally in all cases a ratification will be needed.
Greece is among the countries where survey works are
estimated and paid for at fixed prices and are not based
on tenders. This arises from the assumption that survey
works are scientific works where competition is not
desirable because it may result in poor execution.
This situation has created several problems since,
according to the specifications for every kind of work
involved in the project of the compilation of N.C., fixed
price approved by the Ministry of the Environment, which
is responsible for puplic works and public surveying and
mapping, had to be defined.
One serious and constant problem in the application of this
particular system of payment for works is the tardiness of
the Ministry in producing new fixed prices for works
related to the new technologies, for special works that are
a combination of technical and other scientific fields (i.e.
legal) and for works executed in the past usually by public
institutions. Photogrammetric surveys of urban areas or
related to satellite images and cadastral work for all types
of land are examples of this kind of work.
It is clear then that the compilation of a list of fixed prices,
to be applied for pricing the works related to the
developing project of the N.C. is very difficult. The list of
prices consists of only twenty five prices, most of which
relate to photogrammetric surveys and to
photogrammetric Cadastral Surveys. The innovation
introduced by these prices is that they are related to the
technical specifications for the N.C..
The list of prices for the N.C. is completely new for the
country and it will be tested during the pilot phase of the
N.C. project.
124
2.2 Cost Analysis for the Compilation of the
National Cadastre
The estimate of the total cost for the compilation of the
N.C. is related primarily to the total area of the cadastral
survey. The determination of the cost is given in unit
values per hectare and is based on:
l. the statistical information concerning the mean
landparcel area on rural land, the mean density of
buildings on urban land, the mean average of ownerships
/ co-oownerships in the Hellenic jurisdiction
ll. empirical estimates, derived from experience acquired
in the past during the execution of similar works in
Greece, concerning the mean average of the disputes
submitted
Ill. the prices defined in the official price-list for the
following works:
- photogrammetric surveys of various landtypes on
scales of 1:1.000 (for urban land), 1:2.000 (rural),
1:5.000 (rural), 1:10.000 (pastures-forests) and
1:20.000 (pastures-forests-other)
field and cadastral surveys of special urban, rural and
other land
processing of ownership statements and the
accompaning certificates (titles, transaction
certificates, diagrams, etc) and compilation of draft
cadastral mapsheets and registers
- Work to be carried out for the processing and judgment
of the disputes, submitted by the owners after the first
publishment of the cadastral maps and registers, by
the first degree committee and the correction of the
cadastral survey according to the committee's
decisions and the most recent data provided by the
Mortage Bureax
work to be carried out for the processing of the
disputes submitted by the owners after the second
publishment and the judgment by the first and the
second degree committee's and the compilation of the
cadastral registers and the temporary titles
- work to be carried out for the transfer of digital data
and the creation of the Geographic Information System
(GIS)
IV. The estimates offered by the National Statistical
Service (NSS) of Greece concerning the municipalities,
population, area, land types etc.
In total, under the Hellenic jurisdiction there are 5.900
municipalities, with population approximately 10 million,
in area of 13 million he, which consists of :
4 he rural land, 5 he pastures, 3 he forests, 0.5 he urban
land, 0.3 he water, and 0.2 he other land types.
For a more efficient approach, the total number of urban
areas has been classified into 3 categories according to
their population and the rural areas into 2 categories
according to the mean landparcel area (MLA).
The estimated cost values, by HEMCO, for various land
types are :
e $ 1,300/he for urban land with a population over 5.000
inhabitants
e $ 900/he for urban land with a population between
2,000 & 5,000 inhabitants
e $ 700/he for urban land with a population less than
2,000 inhabitants
e. $ 135/he for rural land with a mean landparcel area 0.3
he
e $ 100/he for rural land with a mean landparcel area 0.7
he
e $ 25/he for pastures
e $ 16/he for forests
In Table 1. is shown the cost estimate for the various land
types.
International Archives of Photogrammetry and Remote Sensing. Vol. XXXI, Part B6. Vienna 1996
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