The GeoData Cadastral Solution

The Geodata Cadastral Solution creates and manages a “Survey Accurate Coordinated Cadastral Database”. The coordinate ‘model’ produced by the input of survey measurements and the adjustment process replicates the accuracy of the survey information entered from the Title Plans of survey.

In areas of old survey plans, boundary definition becomes an intuitive process for the surveyor, considering the Title Plan dimensions in comparison to what he or she finds and measures on the ground. This intuitive process cannot be completely replicated in a software package, however the coordinates created should consider all the survey information available and provide a model which is the best approximation of the legal cadastre. This is the basic philosophy of GeoCadastre.

Most spatial professionals are now aware of the benefits of a survey accurate Numerical Cadastral Database (NCDB) achieved through a total rebuild or a more cost effective ’gradual upgrade’ process which is subject to needs and budgets.

Different levels of development and utilisation of a survey accurate coordinated cadastre have been achieved in The Northern Territory, ACT, and many Councils throughout NSW and Queensland. Outcomes from some of these various projects have promoted consideration of:
• Legislation for legal coordinates for Title boundary definition. (NT)
• use of coordinates in the chain of evidence for survey boundary definition. (ACT)
• mathematical checking of survey subdivision plans at lodgement. (ACT)
• coordinates as part of the solution to the shortage of surveyors. (ACT)

The Hunter Water Corporation also maintains a current survey accurate cadastral database covering 5 Local Government Areas, which is kept up to date by one person. Other infrastructure projects (roads, pipelines, cables etc) have benefited from substantial savings in survey costs from the creation of a survey accurate coordinated cadastre to assist in planning, feasibility and design. An optic fibre cable project benefited considerably when the new coordinate model confirmed the cable was shown on incorrect properties on an existing cadastre.
The software also allows easy upgrading with modern electronic survey cadastral data from most industry standard packages.
The GeoCadastre/GeoSurvey cadastral solution is unique and powerful. It has been developed with the rigour and quality assurance protocols associated with survey practice to create a permanent upgrade path. It should be noted that for the adjustment process, GeoCadastre utilises the stored current and historical Title survey measurements and also retains curved boundary parameters (ie, radius & chord).
The ‘GeoCadastre’ least squares adjustment engine has been rigorously tested by ESRI as part of their product development using an American comparative geodetic adjustment software. In 2006 Wagga Wagga City Council undertook a pilot study (2006) and confirmed its integrity with a comparison between GeoCadastre and the NSW Lands Department ‘HAVOC’ adjustments.
The benefit of the 'GEODATA' cadastral solution is that it can provide a cost effective ‘stand alone’ platform to generate the cadastral database with full data interoperability, allowing cadastral datasets to be created, adjusted and then uploaded into the ESRI Geodatabase or other GIS industry standards.

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