THE SETUP OF BUILDING CADASTRE IN SLOVENIA

M. Triglav a, *, B. Pegan-Žvokelj a, E. Pogorelčnik b, M. Grilc c

a Geodetic Institute of Slovenia, Jamova 2, SI-1000 Ljubljana, Slovenia - (mihaela.triglav, borut.pegan)@geod-is.si

b Surveying and Mapping Authority of the Republic of Slovenia, Zemljemerska ulica 12, SI-1000 Ljubljana, Slovenia

- ema.pogorelcnik@gov.si c Digi Data, d.o.o., Opekarska cesta 11, SI-1000 Ljubljana, Slovenia - matjaz@digidata.si

Commission VI, WG VI/4

KEYWORDS: cadastre, building cadastre, geodetic registers

ABSTRACT:

The concepts and objectives of the project “Setup of Building Cadastre – Registry Data” in Slovenia are presented. This project,

partly funded by the World Bank, is ordered by the Surveying and Mapping Authority of the Republic of Slovenia (SMA) and will

be finished at the beginning of 2004. The results will be used for many purposes, among those it will also present the groundwork for

real estate taxation. The building cadastre is composed out of registry and cadastral data. Registry data are acquired from different

public databases and fieldwork. For the basis the photogrammetric acquisition of building is used, then every building is linked to

land cadastre and different data about owners and type of residence is presented per building. In the article the quality and

completeness control of registry data is discussed too.

* Corresponding author.

1. INTRODUCTION

The building cadastre is a part of “The Real Estate Registration

and Modernisation Project”, which is funded partly by the state

and partly by the loan of the World Bank.

We can divide “The Real Estate Registration and Modernisation

Project” to (SMA web page):

- Subproject A: Land and building cadastre

- Subproject B: Land register

- Subproject C: Apartment registration development

- Subproject D: Agriculture land use monitoring

- Subproject E: Real estate tax and valuation system

development

- Subproject F: Housing and mortgage reform

- Subproject G: Legal framework for property

ownership

- Subproject H: Project coordination and strategic

studies.

The building cadastre will be established as a part of the

projects A and C.

1.1 Division of the building cadastre

The building cadastre is composed out of two types of data:

- Cadastral data: established and maintained upon

request of the owner of the land, building and a part

of a building by an official procedure,

- Registry data: established and maintained on report or

by acquisation from existing datasets.

In this article the project “The Setup of Building Cadastre –

Registry Data will be mainly presented. The purpose of this

project is to acquire information about every building and a

building part in short term. The product of this project the

Building Cadastre will present a basis for different kinds of

usage for administrative purposes.

The data will be gathered from different kinds or official or

nonofficial databases which cover whole or a part of Slovenia.

Those data will be lead as registry data. At the end of the

project “Setup of Building Cadastre – Registry Data” every

building and every building part will have its own description.

We have to stress that at first the registry data will be known as

technical data, after the process of “The First Layout of Data to

the Potential Owners”, which will be described later on,

technical data will get the status of registry data.

By the laws ZPPLPS and ZENDMPE (see references) the

owner of a building or a building part can declare cadastral data

about his possession. This is possible from the year 1999 on,

but as the public consciousness to sort possession legally in

order is low, there is only a small portion of owners who had

already done cadastral inscription of their real estates (mainly

those who made real estate transactions).

Cadastral data will be introduced to the building cadastre after

the end of the project “Setup of Building Cadastre - Registry

Data”. In the future the cadastral data will supplant the registry

data. But we can not estimate how long the evolution from

mainly registry to mainly cadastral building cadastre will take.

1.2 History and timetable

The key tasks of the project “Setup of Building Cadastre” are

taking part form the year 2001 on and will end in 2004. We can

divide them on:

- “Photogrammetric Acquisition of Buildings”:

1.400.000 acquired buildings

- “Pilot Project of Setup of Building Cadastre”: it

prepared methodological groundwork, the

methodology was tested on test area, its results were

the basis for the preparation of the public official

invitation for tenders for the project “Setup of

Building Cadastre – Registry Data”

- “The Setup of Building Cadastre – Registry Data”

- “The First Layout of Data to the Potential Owners”.

Those tasks were/are performed by Surveying and mapping

authority of the Republic of Slovenia, Geodetic Institute of

Slovenia and different companies that worked/work on different

individual contracts.

The project “Setup of Building Cadastre – Registry Data” begun

in October 2002 and will be finished by April 2004. The

majority of this article is devoted to this project.

2. DATA MODEL OF THE PROJECT “SETUP OF

BUILDING CADASTRE – REGISTRY DATA”

2.1 Organisation of the contractors of the project “Setup of

Building Cadastre – Registry Data”

Figure 1. Local contractors

Figure 2. Regional offices managed by local contractors

(Digi Data, Igea, LUZ, Monolit)

“The Setup of Building Cadastre – Registry Data” is prepared

by consortium of companies presented by joint venture of CRC

Sogema, Inc. form Canada and LUZ, d.o.o form Slovenia,

which include a lot of private geodetic companies at different

locations in Slovenia (Figure 1). Those companies are centrally

managed by the project support office of contractors. The

project support office delegates the work of regional offices,

which manage the work of local contractors.

The project support office of contractors is closely connected

with the consignee (SMA) and its project support office.

2.2 Input data

Before and in the procedure of the project “Setup of Building

Cadastre – Registry Data” a lot of work has been done on the

acquisition of different kinds of already established data basis,

which include information about buildings and building parts.

Input data:

- Data from central database of buildings:

photogrammetric acquisition

- Cadastral inscriptions according to the law ZPPLPS

and ZENDMPE (see references)

- Reservation of house numbers upon a request of the

contractor

- Land cadastre

- Register of spatial units (municipalities, settlements,

cadastral areas, house numbers with cancroids)

- Raster data (digital ortho-photo maps, scanned

topographic maps at a scale of 1:5000, 1:25000)

- Business register

- Central register of population

- Ground rent registers

- Register of consumers of electricity and electricity

payers

- and others.

In the process of gathering data, the data from some building

administration companies were gained. Those data will get the

registry status right away.

Figure 3. Photogrammetricaly acquired building outlines

2.3 Arrangements of attributes

The data recorded in the building cadastre include:

- Identification number of a building and a building

part

- Location and shape of a building and a building part

- Surface area of a building and a building part

- Owner or a potential owner of a building part

- Administrator of a part of a building if state-owned

- Actual use of a building part

- Number of floors in the building

- Connection with land cadastre (number of a parcel on

or under which a building is set, or a parcel on which

is building functionally linked)

- Connection with the Register of Spatial Units (house

number when defined)

- Year of construction of building

- Year of last renovation of a building and a building

part

- Installations in a building (gas, telephone, cable TV,

water, electricity…),

- Construction material of a building

- Number of rooms in a building part (apartment)

- Information whether a building part has a kitchen, a

bathroom, and a toilet.

All records are presented together with the information about

the completeness and reliability.

2.4 Workflow

Work is organised on the unit of a cadastral community.

We can divide stages of workflow on:

- First preliminary treatment of data (preparation of

central register for data)

- Preparation of data: merging photogrammetricaly

acquired building outlines (connecting jutting roofs

with main building)

- Automatic determination of type of the building

- Central automatic determination of different kinds of

attributes which can be deduced out of several input

sources

- First phase at regional office: determination of

attributes which are connected to a building

- Second phase at regional office: determination of

attributes which are connected to a part of a building

- Final merging and final inner control, adding data

from assisting input data sources.

Figure 4. Connecting jutting roofs with main building – we get

just one outline of the building

At the first and second phase of work at regional offices the

work is closely connected with good local knowledge. The

person who works at regional office has to check the automatic

determination of different kinds of attributes and establish those

not determined automatically.

The data are saved centrally and are refreshed simultaneously

with work, so there is no problem between different cadastral

communities on which the work process is simultaneous.

Figure 5. Software environment for the “Setup of Building

Cadastre – Registry Data”

3. DATA QUALITY CONTROL

3.1 Data quality control by the contractors

The contractors carry out inner control of the data quality. Data

quality is regulated by operative instructions written in the

public official invitation for tenders. When the work on the

cadastral community is finished, and inner data quality control

is finished, the cadastral community goes in the data quality

control by the SMA.

3.2 Data quality control by the SMA

The data quality control carried out at SMA is performed on at

least 5 % sample of buildings in cadastral community. If the

cadastral community has less than 500 buildings, the control

sample is bigger. Data quality control is divided in two parts:

contents control and systematic control.

Data quality control by SMA is performed at the local SMA

offices (12 centres) and is based upon a controller with good

local knowledge of the area (Operative instructions for data

quality control by SMA, 2003).

4. FIRST LAYOUT OF DATA TO THE POTENTIAL

OWNERS

After the end of the project the “Setup of Building Cadastre -

Registry Data”, project “The First Layout of Data to the

Potential Owners” is planed. With this procedure the potential

owners of buildings and a building parts will have a possibility

to rectify different kinds of data in the register part of the

building cadastre (not all data).

At the moment “The Pilot Project of the First Layout of Data to

the Potential Owners” is being carried out at Geodetic Institute

of Slovenia. Its main tasks are:

- Preparation of the methodology of the project

- Finding out the conditions which will make this

project possible and have to be regulated with

different new laws (e.g. the taxation law)

- Finding out different possibilities how to inform the

public about “The First Layout of Data to the

Potential Owners”

- On a test sample: testing the response of the potential

owners to the information letters, which will inform

them on the possibility to improve registry data.

“The First Layout of Data to the Potential Owners” is important,

because the potential owners will have only one possibility to

repair the technical data in building cadastre until the data have

this status. Repairing data of one’s possession at this state will

be quick and cheap for the owners. The owners will have to

bear in mind that in the future they will be taxed on the grounds

of data held in building cadastre.

After the end of the project “The First Layout of Data to the

Potential Owners”, the technical data in building cadastre will

change its state to register data.

From then on the owners will only have the possibility to

change the data in building cadastre by cadastral inscription,

which is connected with higher expenses as before described

registry inscription at the stage of “The First Lay Out of Data to

Potential Owners”.

5. THE USAGE OF BUILDING CADASTRE

The data gathered in “The Building Cadastre” presents an

important source of real estate data, which can be used for

different kinds of users:

- For the protection of owner’s rights of the real estate;

from the state point of view, we can mention here its

link to the Land Register

- Calculation of the economical value of the real estate;

here we can mention the administration of the

building (renovation…), economical evaluation of the

building or a part of a building, taxation, the

regulation of the real estate market

- Administration of real estate on the local and state

level

- For land planning purposes; the sustainable

development views

- Basic database for setting up different kinds of

registers connected with buildings (e.g. register of

housekeeping, ecological cards of the building, local

real estate registers…)

- Different tasks connected with the Statistical Office of

the Republic of Slovenia

- and other.

From the beginning of the project “Setting up building

cadastre” the potential users take active part in the definition of

the objectives, which are important for them and have to be

presented in the Building Cadastre.

6. CONCLUSIONS

After finishing the project “Setup up Building Cadastre –

Registry Data” and the project “The First Layout of Data to the

Potential Owners” Slovenia will get a complete and up-to-date

building cadastre which will be useful for different kinds of

applications. It will present a basis for transformation of registry

data to the cadastral data, although this may take much longer

as the “Setup of Building Cadastre - Registry Data” project.

7. REFERENCES

Law on Special Terms for the Registration of Ownership over

Parts of Buildings into the Land Register, Official Gazette of

the Republic of Slovenia, 1999, No. 89, abbreviation ZPPLPS.

Recording of Real Estate, State Border and Spatial Units Act,

Official Gazette of the Republic of Slovenia, 2000, No. 52,

abbreviation ZENDMPE.

Regulation on Building Cadastre Registration, Official Gazette

of the Republic of Slovenia, 2002, No. 15, abbreviation PVKS.

Instruction for Making and Confirmation of Floor Plan, Official

Gazette of the Republic of Slovenia, 2000, No. 2.

Technical documentation for photogrammetric acquisition of

data on buildings linking on land cadastre and register of spatial

units, 2000, 2001, final reports for different acquisition areas by

contract SMA_1.1D3_ICB3, ordered by SMA (in Slovene).

Pilot Project of Setup of Building Cadastre, 2001, Geodetic

institute of Slovenia (in Slovene).

Building cadastre – inscription into the building cadastre,

Instructions for the SMA officials, 2002, Surveying and

mapping authority of the Republic of Slovenia (in Slovene).

Operative instruction for The Setup of Building Cadastre –

Registry Data, 2002, Surveying and mapping authority of the

Republic of Slovenia.

Surveying and mapping authority of the Republic of Slovenia,

http://192.168.1.2/gu_eng/Projects/Real_est/Real_est.asp,

abbreviation SMA web page, 4.6. 2003.

Operative instructions for data quality control by SMA,

Instructions for the SMA officials, 2003, Geodetic institute of

Slovenia and consortium of contractors presented by a joint

venture of LUZ, d.o.o. and CRC Sogema (in Slovene).