- The latest spatial information from multiple field sources increases work place efficiency
- Improved data sharing between utility, local counties, and emergency authorities
- Regulatory compliance for distribution networks
- Increased efficiency in Dial Before You Dig requests
- Accurate sales and use tax calculations
- Improved sales and marketing
GIS Data Conflation Spatial Accurary – Customer Experience
“…Today I did an internal poll on how the *** project owners felt about the results of the Conflation projects.
Drum roll please……. You scored a 99.5%
It has truly been a pleasure working with all of you for the last 2 years. Thanks to you and your teams, *** is now conflated.
Our field workers are already starting to trust the data and use it to do their jobs. Before conflation we could not get our field workers to even use our mapping applications because everything was so out of alignment.
Please thank everyone involved in the process. You should be very proud of your work. The moment we started the selection process, the workshop facilitation, the project management, the work, the delivery and the problem solvers, really everyone involved was dedicated to providing high quality service.
When we did find a problem your team jumped on finding all the issues and wrote code to correct the issues. We didn’t have one argument and we almost had a perfect record on deployments.
It is difficult these days to find a trusted partner in the business and *** truly trusts Ubisense and we-do–IT. We look forward to doing more business with you and your teams. Correct data is power and keeps our customers safe.
Thank you so much for helping us be successful and move into the 21 century…”
GIS Data Conflation Spatial Accurary – Background
In 2000 Land Information New Zealand (LINZ) converted ~1 million land parcels described by “metes and bounds”2 into a network of a measured coordinate accuracy standard that can be used by external surveyors, electronic plan lodgement and public enquiry using the Landonline system.
At the core of this conversion process was a rigorous least squares adjustment program “adjust.IT” developed by we-do-IT specifically for this project, based on academic work by the author going back to 1984. While the Landonline use case was restricted to land parcel data conflation only, the adjust.IT methodology was subsequently refined for Smallworld GIS utility and telco data conflation spatial accuracy adjustments:
Utilities digitised their paper maps 20-30 years ago to the best available control at the time. The resulting digital positional accuracy can vary between ~2m to ~600m+ making spatial overlays between agencies (cadastre, power, gas, water, telco) near impossible.
Since, much better control has become available, sourced from better capture systems or sensors (road centre lines, survey accurate land base, aerial imagery, Lidar, etc.) with sub 0.1m positional accuracies becoming not just common place, but now expected by modern GIS users.
These new control sources create real issues for utilities and Telcos as they are basically “too accurate” and not compatible with existing network locations. To overcome this hurdle, additional control “shift vectors” between old and new land base as well as “network constraints” such as network segment length or orthogonality must be considered during adjustment.
Conventional “rubber sheeting” by orthogonal or affine transformation is unable to model highly inhomogeneous shift models or maintain network constraints. An additional project management challenge is the minimisation of GIS down-time as these systems are used 24×7 for planned and unplanned network interruptions.
Since 2000 we-do-IT has adjusted 300+ million coordinates for AltaGas, Atmos Energy, Ausgrid, CableVision Altice, Chorus, Duke Energy, Ergon Energy, Essential Energy, Fortis BC, Gaz Réseau Distribution France, Helix Water, Manitoba Hydro, Piedmont Natural Gas, Water Corporation of WA and Xcel Energy.
These projects included all of Texas,- high data density New York City,- Western Australia and 80% of Queensland with all of France currently under project. From humble beginnings adjust.IT has become the de facto utility industry standard for network adjustments (called “conflation” in North America and “homogenisation” in Europe).
GIS Data conflation and spatial accuracy made easy – adjust.IT
- 1990 Hesse, W.J., Williamson, I.P., “A Review of Digital Cadastral Data Bases in Australia and New Zealand”, The Australian Surveyor, Vol. 35, No. 4.; First systematic Australia/New Zealand DCDB Review; Researching User Requirements and Solution Design
- 1993 Hesse, W.J., Williamson, I.P., “MAGIC revisited: An Object-Oriented Solution to the Cadastral Maintenance Problem”, The Australian Surveyor, Vol. 28, No. 1.; First academic, non-commercial prototype of adjust.IT
- 1998 Justin Eldridge, J.; Homburg, R.; Patchett, T.; Hesse, W. : “Problems Maintaining Your Spatial Reference System? – adjustIT: we-do-IT”, Proceedings of the Smallworld ’98 International Conference, Barcelona; First commercial BETA release of adjust.IT
- 2002 Rowe, G. “The Survey Conversion Project – Making a Survey-Accurate Digital Cadastre for New Zealand a Reality”, First production strength adjust.IT version; used on $100m+ project to create a survey accurate cadastre for New Zealand
- 2003-2005 Product adaptation for the needs of the International Utilities Market 2006 Eldridge, J.; “Tacoma Power’s Shifting Landbase – Issues and Solutions”, TenSails GITA Symposium; Report on successful Tacoma Power Pilot
- 2008 Hersant, C.; Eldridge J., 2008; “A positive Return on Investment (ROI) Case Study: The Energy Australia Digital Cadastre Upgrade Project”, Seminar Geospatial ROI: Justification Made Easy, GITA Conference 31, March 9-12, Seattle
- 2009-now Used on very large utilites production sites in USA, Canada, France, Australia and New Zealand, a total of 300+ million coordinates have been adjusted successfully