Cadastral GIS An example from Bolivia Pretoria November 7, 2002 - PowerPoint PPT Presentation

Cadastral GIS An example from Bolivia Pretoria November 7, 2002 Christiaan Lemmen

Foto: Edgar Dueri

Foto: Ximena Pereira

Foto: Eric Lawrie

Foto: Eric Lawrie

Foto: Raul Guarachi

– If one buys a piece of land from someone else, how can this person be sure the other one is the real owner of all land involved?

– If one buys a piece of land how can he or she be sure this land is not included in a TCO (Tierras Comunitarias de Origen) area? Or in a communidad?

– If one wants to invest in new buildings or in agricultural development and wants to establish mortgage, how can the bank be sure that the person requesting the mortgage holds the ownership on the complete land?

– If one buys a piece of land how can he or she be sure this specific piece of land is ‘free’ of mortgage?

Chuquisaca Project, Bolivia – 5.1 million ha – Data collection, data ‘cleaning’ – Design of a maintenance proces – Database and application

Information to the Public

Aerial Photographs

Data Collection: Field Office

Data Collection

Data Collection

Data Collection

Data Collection

Data Model NP Object Subject Parcel NNP Apartment Right Ownership Usofruct Use Mortgage Other Informal Rights

Model of Maintenance Cadastre Object Subject Input Output Right Throughput Feedback

Model of Maintenance Cadastre Object Subject Users Users Input Output Right Throughput Feedback

Users CentralGovernment Provinces Notary Insurance Banks Companies Cadastre Surveyors Citizens Brokers Municipalities Companies for Public National Bureau of Services Statistics

Basic Components Public Registers Deeds Cadastral Register Cadastral Map Cadastre Field Sketches

Relations Object Right Subject Ownership 1/1 NP Juan Parcel 1 20 ha

Relations Object Right Subject Ownership 1/2 NP Carlos Parcel 2 0.2 ha Ownership 1/2 NP Juanita

Relations Object Right Subject Ownership 1/1 NNP TCO Parcel 3 4500 ha

Relations Object Right Subject Ownership 1/1 Parcel 4 70 ha NNP Municipality Parcel 5 10 ha Ownership 1/1

Relations Object Right Subject Ownership 1/2 NP Javier Ownership 1/2 NP Johanna Parcel 6 50 ha Usufruct NNP TCO

Relations Object Right Subject Informal NP Peter Parcel 7 20 ha

Relations Object Right Subject Ownership 1/2 Parcel 8 1 ha Ownership 1/2 NP Leo Parcel 8 =>Part 1 Apartment NP Jan Parcel 8 =>Part 2 Apartment

Foto: Raul Guarachi

Foto: Eric Lawrie

Transaction: Establishment of Mortgage Object Right Subject Ownership 1/1 NP Jan Parcel 9 1 ha Ownership 1/1 NP Jan Parcel 9 1 ha Mortgage $ 10.000 NNP Bank

Transacción: Constitución de Hipoteca Object Right Subject Ownership 1/2 NP Pedro Parcel 10 5 ha Ownership 1/2 NP Juanita Ownership 1/2 NP Pedro Ownership 1/2 NP Juanita Parcel 10 5 ha Mortgage $ 8.000 NNP Bank

Transaction: Division Object Right Subject Ownership 1/1 NP Maria Parcel 11 5 ha Ownership 1/1 NP Maria Parcel 12 3 ha Parcel 13 2 ha Ownership 1/1 NNP Municip

Cadastral Map

Platform GeoMedia GeoMedia Oracle 8i Visual Basic Oracle 8i Visual Basic Professional Professional (Oracle) (Microsoft) (Oracle) (Microsoft) (Intergraph) (Intergraph) Windows 2000 Windows 2000 (Microsoft) (Microsoft) Industrial Standards

SAC (Automated Cadastral System) – Urban and rural cadastre – Transparent – Simple structure – First System to maintain cadastral data in Bolivia

Funcionality of the SAC – Cadastral maintenance (object, subject, right) – Information supply – Geometric data and topology – Parcel identifiers + area calculation – Cadastral certificate – Application at national level – Data security, authorisation – Data conversion from other projects

Processes – Alfa-numerical maintenance – Graphical maintenance, surveying – Information supply – Quality improvement – Management analyses – Notification

Field survey 99-7 (orientation) 05-2 10-1 21-5 22-2 23-2 04-3 06-7 25-2 24-2 03-4 T 26-2 02-3 01-1 12-2 11-2 100 L 15-1 16-2 28-7 29-7 18-2 17-2 M 19-2 20-8 T: tacheometer L: measuring line 14-2 M: distance-series

Remarks – It’s very easy to make a cadastral infrastructure very complex, it’s very complex to make it easy – Cadastre is there for it’s users - not the other way around...

Thank you