PORTFOLIO OF CONTRACTS
DELIVERING THE POWER
FIT-FOR-PURPOSE DCDB LAND ADMINISTRATION SYSTEMS FOR INFORMED MANAGEMENT UTILISING RIGOROUSLY SURVEY-ACCURATE
DIGITAL CADASTRAL DATA
SPATIAL QUALITY & ASSURANCE OF
Conversion of Cadastral Fabric Utilising GeoCadastre ePlan DCDB
GEODATA AUSTRALIA has completed a variety of projects for many clients and varying purposes. The singular element, uniquely offered by Geodata Australia and sought by our clients, is improved spatial quality with an assurance of accuracy in the cadastre covering their particular projects.
As well as providing strategies for Cadastral Database upgrading and management for various government sectors, Geodata Australia has completed many Cadastral Modelling projects for specific undertakings of Government, Utilities and the private sector. Different projects have different parameters, as highlighted by the four projects shown below. The critical management component is that different parameters require considerable flexibility in how the modelling strategies are applied, in response to both the variables of available data quality and the resources (technical & commercial) available. GA provides specialised skills in this area.
Several projects are featured below and a link to our Portfolio of completed projects is provided to illustrate the variety and depth of Geodata’s expertise and experience in the field of Cadastral Modelling.
SYDNEY CBD LIGHT RAIL
A Survey Data Model (SDM) of the Sydney CBD and South East Light Rail Project (CSELR) was prepared for the planning and design process in conjunction with project surveyors Cardno Hard & Forrester. The SDM provides an accurate cadastre of the properties abutting the route of the project in a digital format that provides a dynamic, accurate and intelligent cadastral foundation within the project-specified ESRI Parcel Fabric GeoDatabase environment.
Section of Sydney CBD Light Rail project
with more than 4,000 land parcels surveyed
COMPLETE CASE STUDY MAY BE
The project area surrounds the Townships of Kilkivan and Goomeri. The terrain is rugged and land use is predominately rural with significant tracts of State-owned Forestry Lots.
The Gympie Regional Council (GRC) was concerned the spatial quality of the existing Cadastral database was not meeting their business needs. The GRC Spatial Data management team provided a Business Case to Council that was successful in securing funding to increase the accuracy of the data base in those areas.
A project was undertaken to build a dynamic Numerical Cadastral Data Base (NCDB) by entering the survey dimensions of the current and historical survey plans into a Survey Data Model (SDM). The project was completed jointly by Land Solution Australia (a survey firm) and Geodata Australia. Land Solution Australia performed the survey work in surveying control used and Geodata managed the data entry of survey plans and the adjustment using Geodata's own patented software, GeoCadastre®.
The accuracy of the GRC Cadastral Database was reduced from errors of 30-50m to below 1m in rural areas and 300mm in peri-urban areas.
NORTHERN TERRITORY CADASTRE MODEL
The Northern Territory (NT) is an example of the extremes of Cadastre – from city blocks and residential subdivisions to large Pastoral Leases that may cover over a million hectares. Whether in a metropolis or the Australian Outback, all have the usual complexities from requiring the highest accuracy solutions for intense development, to defining large Pastoral Leases with 80km boundary lines in a spheroidal reference frame - involving a higher level of co-ordinate geometry and adjustment functionality.
The NT government has been using our Geodata Australia (GA) processes for over ten years, aiming to create a complete Survey Data Model (SDM) of the Territory cadastre. In utilising measurement data from survey plans of subdivision, the Govt. has substantially completed the urban areas and the Pastoral Lease areas will be completed in the near future.
Co-ordinates Defining Land Titles
Legislation was enacted in 1994 to benefit from the SDM process, such that co-ordinates will become the primary evidence for Title boundary definition in areas that have been proclaimed accordingly. The NT Surveyor General (SG) has recently proclaimed three areas where he has deemed the Survey Database is of sufficient quality for that purpose and co-ordinates now spatially define Land Titles in those areas. In the near future it will be mandatory that most survey content on Survey Plans defining Land Titles be lodged as XML files with evidence that the plan file has passed self-validation tests undertaken by the surveyor. The GA development team has provided the NT government with the technology and strategic advice to progress these automated digital workflows.
COMPLETE CASE STUDY MAY BE
PROOF OF CONCEPT
The Bureau of Land Management (BLM) is the US Federal agency responsible for the surveying and mapping of federally owned lands and native Indian lands. It administers more than 247.3 million acres of public lands.
Over recent years BLM was actively seeking technologies to replace its existing tools for the digital database storage and transfer of Public Land Survey System (PLSS) Townships, defined by survey plats.
BLM has since adopted the ESRI Parcel Fabric as the technology to manage that data as discussed HERE. Prior to that decision, Geodata Australia prepared a small Parcel Fabric as a Proof of Concept (PoC). GeoCadastre® (GC) was configured to import BLM digital data in the existing GMM structure and survey plat measurement data was also manually entered into GC. Co-ordinates to adjust the Parcel Fabric were sourced from a local surveyor to complete the adjustment of the dataset.
Mount Diablo Summit-Building Roof Promenade & Beacon Tower, Constructed by Civilian Conservation Corps, 1939-42
On a clear day one can see more land from the top of Mount Diablo than from anywhere else in all of the Western States. Because of its prominent position, Mount Diablo is the starting point for the establishment of land boundaries throughout most of California and all of Nevada. The summit is the location of the "Initial Point," the north/south meridian, and east/west baseline intersection point that is the basis for most property boundaries.
In July 1851, Col. Leander Ransom, General Land Office Deputy Surveyor, labored to the top of Mt Diablo in oppressive summer heat. Under instructions from the Surveyor General for California, he was to establish an initial point at the summit, through which the new Mt Diablo base and meridian lines would run. He chiseled a hole in solid rock on the highest point and erected a flagpole to be used as a sight to establish monuments on the base and meridian lines. Ransom then went due south twelve miles and set additional monuments to establish the meridian line. He continued setting monuments due east, due north, and due west of the initial point on the summit of the mountain, thereby establishing the Mount Diablo Base and Meridian lines.
One year later, in 1852, R. D. Cutts of the United States Coast and Geodetic Survey traveled to the top of Mount Diablo on a mission to establish a survey marker for mapping surrounding waterways and topography. The point established by Cutts is now marked by a copper pin at the base of the concrete pillar, in the basement of the summit tower and also a rectangular-shaped depression in exposed bedrock three feet northwest of the copper bolt marks Ransom's initial point. In July of 1993, land surveyors from around California gathered on top of Mt. Diablo to celebrate the installation of a new plaque commemorating the survey makers on the summit of Mount Diablo. The new plaque was placed on a concrete pillar inside the basement of the summit tower.