Modelling the spatial data of Hellenic Cadastre and generating the geodatabase schema Aris Sismanidis ARISTOTLE UNIVERSITY OF THESSALONIKI FACULTY OF ENGINEERING

Modelling the spatial data of Hellenic Cadastre Modelling the spatial data of Hellenic Cadastre and generating the geodatabase schema and generating the geodatabase schema

Aris Sismanidis

ARISTOTLE UNIVERSITY OF THESSALONIKI FACULTY OF ENGINEERING SCHOOL OF RURAL AND SURVEYING ENGINEERINGDEPARTMENT OF CADASTRE, PHOTOGRAMMETRY AND CARTOGRAPHY

COST G9 Modelling Real Property Transactions

Working Group no 2, 2nd – 3rd September 2004 in Székesfehérvár, Hungary

Modelling the cadastral transactions Modelling the cadastral transactions of sale and subdivision in Greece of sale and subdivision in Greece

Modelling the cadastral transactions of sale and subdivision in Greece

reinforcement of data exchange between land registration systems

reduction of the transaction costs increase of the transparency of real.property markets

Benefits of modelling the cadastral Benefits of modelling the cadastral transactionstransactions

The cases of salesale and subdivisionsubdivision are being analysed taking into account: technical juridical administrative proceduresfrom the time that a beneficiary motivates the transaction until its completion

Modelling the cadastral transactions Modelling the cadastral transactions of sale and subdivision in Greeceof sale and subdivision in Greece

Person motivates the purchase

Beginning of the sale [Yes]

Buyer addresses directly to the owner

Real Property Agency finds a suitable parcel

Does the person address to a

Real Property Agency?

[No]

Agreement about the price of purchase

[Yes]

[No]

Is the price of the purchase

over 12.000€?

Owner and buyer appeal to separate lawyers

Buyer addresses to a lawyer

Before addressing to a notary, owner and buyer collect

the necessary documents

The notary draws up the deed

Owner and buyer sign the deed

[Cadastral Office]

What is Land Registration

System?

[Mortgage Office]

Cadastral officer checks for the legality of the deed

and documents

Mortgage officer checks for the legality of the deed

and documents

New beneficiary submits the deed to the Cadastral Office

New beneficiary submits the deed to the Mortgage Office

Registration of the new title

Is check valid?

[Yes]

[No]

Is the pendency eliminated?

[No]

Change of Cadastral database records

Temporal registration of the new title

[Yes]

Completion of the property transfer

Are the necessary documents collected

and valid?

[No]

[Yes]

Deletion of the temporal registration

Cancellation of the property transfer

Owner addresses to a surveyor

Surveyor depicts in a sketch the land parcel

Notary checks the title of the real property

Notary checks if there is any charge (servitude, mortgage)

[No]

[Yes]

Elimination of mortgage(-s)

Notary checks the rest of the documents

Existence of mortgage(-s)

Modelling the cadastral transaction of saleModelling the cadastral transaction of sale

Person motivates the purchase

Real Property Agency finds a suitable parcel

Buyer addresses directly to the owner

Agreement about the price of purchase

Owner and buyer appeal to separate lawyers

Buyer addresses to a lawyer

Owner addresses to a surveyor

Surveyor depicts in a sketch the land parcel

Before addressing to a notary, owner and buyer collect

the necessary documents






Owner and buyer sign the deed

New beneficiary submits the deed to the Cadastral Office

New beneficiary submits the deed to the Mortgage Office

Cadastral officer checks for the legality of the deed

and documents


Change of Cadastral database records



Mortgage officer checks for the legality of the deed

and documents

Beneficiary motivates

the subdivision

Beginning of the subdivision

Beneficiary addresses

to a surveyor

Surveyor checks the documents concerning

the real property



[No]

[Yes]

Existence of mortgage(-s)


Beneficiary receives a certification that the subdivision is permitted

The notary draws up the the deed

Beneficiary sign the deed

[Cadastral Office]

What is the Land Registration

System?

[Mortgage Office]

Cadastral officer checks for the legality of the documents

Mortgage officer checks for the legality

of the documents

Beneficiary submits the deed and the documents to

the Cadastral Office

Beneficiary submits the deed and the documents

to the Mortgage Office

Registration of the new titles

Is the check valid?[Yes]

[No]


[No] Change of Cadastral database records and

updating of the cadastral maps

Temporal registration of spatial transaction

[Yes]

Completion of the subdivision

Is the pendency eliminated?

[No]

[Yes]


Surveyor fills in a a declaration form that the created land parcels are buildable.

The declaration must be accompanied to a plan depicting the land parcels.

Beneficiary addresses to a notary having all the necessary documents

Subdivision is cancelled

Are the necessary documents collected

and valid?

In case the initial land parcel is placed inside the urban area, the surveyor checks if the created

land parcels are buildable according to the urban planning legislation

In case the initial land parcel is placed inside the zone, the surveyor checks if the

area of each created land parcel is usually over 2000m2

The surveyor checks if the land parcel originates from land consolidation or distribution that the

Ministry of Agriculture had executed

In case the land parcel is placed inside the residential control zone,

the surveyor checks for the minimum area of the subdivided land parcels, that the decrees define

Is the subdivision forbidden by the

restrictions? [Yes]

[No] Subdivision is cancelled

Beneficiary applies to the Cadastral office for a cadastral diagram and

the numbers of the land parcels that change

Surveyor depicts in a sketch the land parcels and updates the sketch according to the mutation

that took place. He names the new created points in the cadastral map and gives a table of coordinates of the new points in

the Hellenic Geodetic Reference System 1987.

Modelling the cadastral transaction of Modelling the cadastral transaction of ssubdivisionubdivision

Beneficiary motivates

the subdivision

Beneficiary addresses

to a surveyor

Surveyor checks the documents concerning

the real property









In case the initial land parcel is placed inside the urban area, the surveyor checks if the created

land parcels are buildable according to the urban planning legislation

In case the initial land parcel is placed inside the zone, the surveyor checks if the

area of each created land parcel is (usually) over 2000m2In case the land parcel is placed inside the residential control zone,

the surveyor checks for the minimum area of the subdivided land parcels, that the decrees defineThe surveyor checks if the land parcel originates

from land consolidation or distribution that the Ministry of Agriculture had executed

Beneficiary receives a certification that the subdivision is permitted

Surveyor fills in a declaration form that the created land parcels are buildable.

The declaration must be accompanied to a plan depicting the land parcels.

Beneficiary addresses to a notary having all the necessary documents

Surveyor depicts in a sketch the land parcels and updates the sketch according to the mutation

that took place. He names the new created points in the cadastral map and gives a table of coordinates of the new points in

the Hellenic Geodetic Reference System 1987.

Cadastral officer checks for the legality of the documents

Beneficiary submits the deed and the documents to

the Cadastral Office

Beneficiary applies to the Cadastral office for a cadastral diagram and

the numbers of the land parcels that change

Beneficiary submits the deed and the documents

to the Mortgage Office

Change of Cadastral database records and

updating of the cadastral maps

Beneficiary sign the deed

Mortgage officer checks for the legality

of the documents

The Hellenic Cadastral DataThe Hellenic Cadastral Data

Modelling the spatial data of Hellenic Cadastre and Modelling the spatial data of Hellenic Cadastre and generating the geodatabase schemagenerating the geodatabase schema

RelationalRelationalDatabaseDatabaseSystemSystem

Object Object Oriented Oriented

DesigningDesigning

UMLUML XMLXML - XMI - XMI

GeoDataBaseGeoDataBase

XML IntroductionXML IntroductionXML is...

eXtensible Markup Languagederived from SGML (Standard Generalized Markup Language - ISO 8879)an open standard which was approved in February 1998 from W3C, and includes ISO character setsa standard way of representing information in a text format (use tags to describe document structure and content) ideal for use in exchanging data in a standard, easy to interpret formatsimilar to HTMLsystem-independentsupported from a wide range of software developers (IBM, Microsoft, Adobe, Oracle etc)defines, validates, and supports the sharing of formats in the web

Modelling the spatial data of Hellenic Cadastre and generating the geodatabase schema

XMI – An important initiativeXMI – An important initiative

XMI is…

XML Metadata Interchangean open standard like UML and XML inspired by Object Management Group’s (OMG)uses XML in order to achieve the textual representation of UML specifications enables the easy interchange of data between modeling tools based on UML or other tools


Generation of the geodatabaseGeneration of the geodatabase

The steps for creating the geodatabase were:

Design the object model in static structure UML diagram in Ms Visio 2003, using a template published by ESRI (ArcInfo UML model)

Export the model to XML Metadata Interchange (XMI), using the XMI Export facility

Generate and create the geodatabase schema, in ArcGis 8.3

The generation tools translate the UML model into an empty geodatabase schema, that is, a set of feature classes, tables, relationship classes, and rules.

UML, XML, XMI are used in order to approach a model for the spatial data of the Hellenic Cadastre and achieve the generation of the geodatabase in a GIS software.


Conclusions- Benefits of use UML, XML & XMIConclusions- Benefits of use UML, XML & XMI

UML can be used to capture systems analyses and create linguistic data modelsXML is a data interchange format characterized by its simplicity, flexibility and extensibilityXMI is a tool for the transformation of object-oriented models into text format. XMI can be transformed into implementation specific productsThese technologies facilitate the exchange of information in an independent manner, allowing developers to build, store, and exchange models, regardless of using a programming language. In other words, they achieve the interoperability and the easy interchange of data between heterogeneous systems


Conclusions- ProblemsConclusions- Problems

During the procedure of importing the data model in ArcInfo, the model had to be rebuilt in a more relational perspective so that the import of the model can be applicable, because ArcInfo operates in a more relational perspective either than in object oriented logic

Software tools that export in XMI format use different versions of XMI, a problem which is strengthened by the various versions of UML


Documents

Modelling the spatial data of Hellenic Cadastre and generating the geodatabase schema Aris Sismanidis ARISTOTLE UNIVERSITY OF THESSALONIKI FACULTY OF ENGINEERING