deeds
owners
parcel
information
real
rights
parcels
Owing to the complicated legal requirements and pro
cedures the actual data structure is far more complex
than the diagram would suggest. This will be clearfrom
the fact that 280 data elements are defined, divided over
85 logical records.
The following items will give an impression of the kind
of parcel information that is recorded:
- address
- reference co-ordinates
- restrictions of use
- use
- cultivation
- area.
Items that could be added are:
- lease
- users
- value
- destination of land use
- building information.
Apart from the administration oriented land information
system another development has been started to create
an integrated surveying and mapping database. This is
necessary because of the increasing application of auto
matic surveying and mapping procedures by many sur
vey organizations. In order to make co-operation easier
and exchange of information possible it is important to
establish a standard for digital maps.
The database will contain at least the information, re
presented on the cadastral map and on the large scale
basic map. The purpose of this database is to realize a
basis for all surveying and mapping activities in the
country in the future and to meet the divergent
demands for maps.
The most important standards that have to be laid down
for this purpose can be described as follows:
- classification of topographical elements for large
scale maps;
- accuracy and reliability of the co-ordinates;
- identification of topographical data and data struc
tures;
- exchange standards and conversion methods.
Because of the serious theoretical problems of an inte
grated database for surveying and mapping it has been
decided to start with a pilot project. This project should
give information on the technical, social and economic
aspects of the creation of such a database.
The decision to develop two separate cadastral infor
mation systems was made for the following reasons:
1The complexity of each system is already so evident
that integration is almost impossible.
2. The separation of the systems is quite logical,
because the only link between the systems is the
cadastral parcel number. The parallel updating of
this element can be guaranteed by taking organiza
tional measures.
3. The conversion of the cadastral registration is esta
blished per province and per municipality, while the
conversion of the cadastral maps will be done per
map or combination of maps, depending on the
quality of the maps. These two approaches meet at
the end of the conversion processes, i.e. after
20 years or so.
4. The users of the two systems are generally not the
same. Therefore the need for an integrated system is
not very urgent.
Of course, the Cadastre is not the only organization
developing or using land information systems. At local,
regional and national levels task oriented land infor
mation systems are being implemented, on behalf of:
- municipal management
- road management
- land and water management
- housing
- taxation
- statistics
- traffic accidents
- delivery of mail
- underground networks.
A study made of the different systems revealed that
most systems make use of one of the two main identifi
cation elements, namely:
- cadastral parcel identification
- house-address.
For this reason a plan has been made up to create a
special information system to relate these two elements
of identification. A system of this kind enables infor
mation to be exchanged between systems using differ
ent identification methods.
A second aim is to establish a standard for the address
identification for the whole country. Moreover, a link-up
can be established with the map oriented information
systems using reference co-ordinates. The link-up
between the three groups of land-related information
systems through this identification system is shown in
this diagram:
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NGT GEODESIA 82
