Cadastral Data Assessment Portal Launched
BC Spatial's first project milestone - a snapshot assessment of ICIS' cadastral data holdings - is nearing completion. Results are being posted to a freshly-launched data assessment portal. The portal allows users to interactively interrogate cadastral data qualities through a (Google) map display.
Initial data quality themes include:
- Maintenance Profile - What is the vintage of the data? How varied/uniform is it?
- Completeness - How completely does the data reflect the Provincial parcel registry (LTSA)?
- Attribution - What standard identifiers and content are available?
- Spatial Alignment - How well do the discrete data submissions fit together?
- Spatial Correctness - How accurately do the parcels reflect real-world locations?
This last theme has not yet been tackled; one of our challenges during the upcoming pilot phase will be to identify and source authoritative information that can comment on the spatial accuracy of parcels.
The assessment results have initially been confined to the lower mainland (GVRD), where ICIS enjoys a healthy variety and volume of parcel data. As these analytical themes are confirmed (by you) and refined, additional areas will be assessed and integrated to the portal.
Please dig in and let me know...
- What gives you the highest value?
- What's missing?
- Is anything unclear?
Your feedback will help us to tweak the data processing. It is our intention to stand on the shoulders of these results to focus ICIS' internal data management and reporting practices, and data quality funding program. It will also provide the firm foundation that we require for the establishment of standards in a subsequent phase.
posted by Paul van Nieuwkuyk @ 9:40 AM
2 Comments
2 Comments:
Excellent concept. One issue, regarding spatial correctness, is what data we are going to use to evaluate this. The only data that is currently available is the MASCOT data. We need access to this data, or spatial correctness cannot be evaluated.
The only other option to the MASCOT data, is that ICIS creates its own data products to compare the cadastre to. For this there are two options; either a dataset to reflect the subjective information that is relayed from Land Surveyors, or an integrated control points layer which is generated from LG and surveyor control points.
The assessment portal was demonstrated to the ICIS board of directors and member segment technical advisers at the July 16 ICIS board planning day.
As GM of ICIS, I was able to assess the reaction from the group to the demonstration and explanations given by Paul. Overall, the BCSpatial Assessment Portal was very well received with high marks for value to all existent and potential users. The information yielded on the various states of the disparate data sets integrated in the cadastral fabric yields tangible results useful to assessing data use for individual member business requirements.
The portal is a great beginning for the 1st milestone of BCSpatial.
Barry Logan, ICIS GM
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