Cadastral Re-Alignment: Water Corporation approach to spatial data shifting David Bulfield, Team Leader Spatial Systems Team, Spatial Information Management, Water Corporation (Western Australia) Justin Eldridge, Principal Consultant We-do-IT 1
What we will discuss today Introduction Background to project Business drivers Technical details Summary Oil & Gas 2011 Cadastral Re-alignment at Water Corporation 2
Acknowledgements Water Corporation Management for endorsing Business Case We-do-IT for providing solution & provision of technical services to run it! Mercury Project Solutions Jorg Hiltenkamp - on site Project Manager CSC for all IT support and on site data loading and processing Spatial Information Management Data Capture Team All data QA/QC for each delivery Spatial Systems Team Project and Operations support. Manager Phil Beach Oil & Gas 2011 Cadastral Re-alignment at Water Corporation 3
We are here in Houston Perth is over here Oil & Gas 2011 Cadastral Re-alignment at Water Corporation 4
Oil & Gas 2011 Cadastral Re-alignment at Water Corporation 5
Our Operations Land area ~1 million sq mile 7,800 miles of coastline. Population approx 2.4 million 1,114,369 properties served 72 recycled water schemes 21,000 m of water mains 9,450 m of sewer mains 1,800 m of drains 102 dams and weirs 488 water pump stations 266 water treatment plants 105 wastewater treatment plants Oil & Gas 2011 Cadastral Re-alignment at Water Corporation 6
Background The Water Corp manages the position of its assets (water, sewer, drainage and irrigation) in relation to property boundaries and road centrelines. Water Corp took regular updates of cadastre from the Department of Lands (Landgate) until 1992. Later information was warped to fit this base cadastre. Landgate have continually improved survey accuracy of all data within their database. Adoption in 2001 of GDA 94 Spatial Shift (~ 7m NNE) created basis for GPS type data collection. As a consequence WaterCorp asset infrastructure data is now deemed to be positioned inaccurately. Oil & Gas 2011 Cadastral Re-alignment at Water Corporation 7
What is the problem? Our stakeholders have access to: o data sources with much higher spatial accuracy o low-cost, high accuracy GPS technology o high-resolution Ortho-photography all are basically too accurate and therefore incompatible with the WaterCorp s legacy land base Result Perception of incorrectly located asset data when viewed against data from other sources because of the internal misalignment of cadastral data! Oil & Gas 2011 Cadastral Re-alignment at Water Corporation 8
Example of current mis-alignment Landgate Road centre-line WaterCorp pipes WaterCorp Street Location Oil & Gas 2011 Cadastral Re-alignment at Water Corporation 9
Cadastral Re-alignment - Initiation Timeline 2000 2008: Project identified and progressed to acceptance of legitimate case for action 2008: Cadastral Realignment Project was established to assess available solutions March 2009: Market scan of technical capability Oct 2009: RFP issued for the preferred software solutions June 2010: We-do-IT s service proposal and software package adjust.it selected as most compatible with host Smallworld GIS March 2011: Implementation Phase commenced Oil & Gas 2011 Cadastral Re-alignment at Water Corporation 10
Appoint Project manager Project Implementation Activities Establish secure remote access for contractors and access to 8 virtual PCs for data processing. Contract 2 additional operational staff to provide internal data QA/QC. Train staff in use of toolset for QA/QC and overview of process. Install software into application space. Develop relevant delivery areas across the state to manage variable densities. (see following slide) Oil & Gas 2011 Cadastral Re-alignment at Water Corporation 11
Delivery Areas Business rules Least disruption to business as usual Manageable size (average 1,000,000 geometry points) Aligned to existing boundaries where possible (to minimise linear asset kinks ) Oil & Gas 2011 Cadastral Re-alignment at Water Corporation 12
Our Solution Unique Landbase Conflation Methodology Oil & Gas 2011 Cadastral Re-alignment at Water Corporation 13
Adjustment Process adjusted network Existing network Constraints on adjustment shift vectors old land base new land base Oil & Gas 2011 Cadastral Re-alignment at Water Corporation 15
Adjustment Project Methodology Project Initiation adjust.it Installation and configuration QA/QC of adjust.it Installation and Configuration Model Shift Define Shift Models covering Service Territory Match old and new land base to produce shift vectors QA/QC of Shift Vectors Adjustment of assets Define adjustment Job Areas covering service territory Capture layout of existing assets & adjust QA/QC of Adjustment Result Delivery to Production GIS Group adjustment Jobs into a Delivery Propagate Jobs to top alternative tree and sub alternatives QA/QC of rollout Oil & Gas 2011 Cadastral Re-alignment at Water Corporation 16
Project Initiation Model Shift between land bases Adjustment of assets to new land base Delivery to Production GIS Modelling Shift between Old and New Land Base Oil & Gas 2011 Cadastral Re-alignment at Water Corporation 17
New Land Base Out of Alignment Project Initiation Model Shift Adjustment of assets Delivery to Production GIS New Land Oil & Gas Old 2011 Land Cadastral Re-alignment at Water Corporation 18
Create Shift Vectors Project Initiation Model Shift Adjustment of assets Delivery to Production GIS New Land Old Land Oil & Gas 2011 Cadastral Re-alignment at Water Corporation 19
Shift Model As a Grid of Shifts Project Initiation Model Shift Adjustment of assets Delivery to Production GIS Oil & Gas 2011 Cadastral Re-alignment at Water Corporation 21
Shift Model Not Always Uniform Project Initiation Model Shift Adjustment of assets Delivery to Production GIS Oil & Gas 2011 Cadastral Re-alignment at Water Corporation 22
Project Initiation Model Shift between land bases Adjustment of assets to new land base Delivery to Production GIS Adjustment of Network Data Oil & Gas 2011 Cadastral Re-alignment at Water Corporation 25
Before Adjustment Project Initiation Model Shift Adjustment of assets Delivery to Production GIS 57ft / 19m Oil & Gas 2011 Cadastral Re-alignment at Water Corporation 26
After Adjustment Project Initiation Model Shift Adjustment of assets Delivery to Production GIS 57ft / 19m Oil & Gas 2011 Cadastral Re-alignment at Water Corporation 27
Before Adjustment Project Initiation Model Shift Adjustment of assets Delivery to Production GIS Oil & Gas 2011 Cadastral Re-alignment at Water Corporation 30
After Adjustment Project Initiation Model Shift Adjustment of assets Delivery to Production GIS Oil & Gas 2011 Cadastral Re-alignment at Water Corporation 31
Before Adjustment Project Initiation Model Shift Adjustment of assets Delivery to Production GIS Oil & Gas 2011 Cadastral Re-alignment at Water Corporation 32
After Adjustment Project Initiation Model Shift Adjustment of assets Delivery to Production GIS Oil & Gas 2011 Cadastral Re-alignment at Water Corporation 33
Adjustment Process Summary Oil & Gas 2011 Cadastral Re-alignment at Water Corporation 36
Back to the Business Operation (from Shift models) To Business Models Oil & Gas 2011 Cadastral Re-alignment at Water Corporation 37
Final Acceptance Once a Deliverable Area has been accepted into Production: WaterCorp cadastre will be superseded for the delivered area Landgate cadastre will be made visible for the delivered area Data matching to add existing WaterCorp business attributes to new Landgate land parcels (e.g. the Customer ID value from current Water Corp land parcel added to new Landgate land parcel. Note: the WaterCorp Land data model will not change End result - User Satisfaction Oil & Gas 2011 Cadastral Re-alignment at Water Corporation 38
All Spatial Applications Final data merge TOP 6 - All changes can be merged down to the Working Top. SHIFTED ASSETS COMPLETION Operational data merge The Roll-out Process Replica DELIVERY Working Top 1a We-do-it deliver adjustments to TOP and Water Corp are to perform QA. 2 - All data work posted to TOP & merged with Adjustments All Complete 5- QA stage 2 account data. Final merged landbase loaded to the TOP alternative. 4 - Post-processing stage 2 occurs inside of CAD alternative. (CSIS account matching, old land superseded) adjustit scratch Alternative CAD Adjusted Alternative ADJUSTMENTS Delivery Area 1 - CAD 1 Load copy of new landbase inside delivery area Post process stage 1. 3 - Shifted assets are merged down into the CAD alternatives. These alternatives now contain shifted assets AND new cadastre objects. Delivery Area 2 CAD etc.. Before Friday Friday Delivery Saturday week-end processing Sunday Timeline Monday Tuesday Oil & Gas 2011 Cadastral Re-alignment at Water Corporation 39
It s all better now Landgate Road centre-line WaterCorp Street Location Oil & Gas 2011 Cadastral Re-alignment at Water Corporation 40
Lessons Learned Assess early matching of internal land references to final detail to minimise post processing. Maintain rotation of experienced staff to ensure QA/QC process consistency. Data integrity opportunity as the process exercises every piece of spatial data Ensure early backing from Business in order to maintain support for the long haul (12 months) Try not to attempt this at same time as a complete transition to new GIS Data model & Supporting Application Suite! Oil & Gas 2011 Cadastral Re-alignment at Water Corporation 41
Questions?? Oil & Gas 2011 Cadastral Re-alignment at Water Corporation 42
Oil & Gas 2011 Cadastral Re-alignment at Water Corporation 43