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 (TierrasComunitarias 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 Parcel Apartment Object Subject NP NNP Right Ownership Usofruct Use Mortgage Other Informal Rights
Model of Maintenance Cadastre Object Subject Input Right Output Throughput Feedback
Model of Maintenance Cadastre Object Subject Users Input Right Output Users Throughput Feedback
Users Insurance Companies Surveyors Brokers Provinces CentralGovernment Cadastre Notary Banks Citizens Municipalities Companies for Public Services National Bureau of Statistics
Basic Components Deeds Public Registers Cadastral Register Cadastral Map Cadastre Field Sketches
Relations Object Right Subject Parcel 1 20 ha Ownership 1/1 NP Juan
Relations Object Right Subject Parcel 2 0.2 ha Ownership 1/2 NP Carlos Ownership 1/2 NP Juanita
Relations Object Right Subject Parcel 3 4500 ha Ownership 1/1 NNP TCO
Relations Object Right Subject Parcel 4 Parcel 5 70 ha 10 ha Ownership 1/1 Ownership 1/1 NNP Municipality
Relations Object Right Subject Parcel 6 50 ha Ownership 1/2 NP Javier Ownership 1/2 NP Johanna Usufruct NNP TCO
Relations Object Right Subject Parcel 7 20 ha Informal NP Peter
Relations Object Right Subject Parcel 8 1 ha Ownership 1/2 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 Parcel 9 1 ha Ownership 1/1 NP Jan Parcel 9 1 ha Ownership 1/1 NP Jan Mortgage $ 10.000 NNP Bank
Transacción: Constitución dehipoteca Object Right Subject Parcel 10 5 ha Ownership 1/2 NP Pedro Ownership 1/2 NP Juanita Parcel 10 5 ha Ownership 1/2 NP Pedro Ownership 1/2 NP Juanita Mortgage $ 8.000 NNP Bank
Transaction: Division Object Right Subject Parcel 11 5 ha Ownership 1/1 NP Maria Parcel 12 3 ha Ownership 1/1 NP Maria Parcel 13 2 ha Ownership 1/1 NNP Municip
Cadastral Map
Platform Oracle 8i (Oracle) GeoMedia Professional (Intergraph) Windows 2000 (Microsoft) Visual Basic (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 06-7 01-1 02-3 04-3 03-4 100 T 22-2 23-2 25-2 24-2 26-2 11-2 12-2 L 28-7 15-1 16-2 29-7 18-2 17-2 T:tacheometer L: measuring line M: distance-series 14-2 20-8 19-2 M
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