Positional ImprovementWhat is Positional Improvement (PI)? Land & Property Services (LPS) large-scale mapping has been compiled over a period of many years, with the first surveys being undertaken in the 1830s. Over this period of time, the survey methods used to collect data have continuously evolved as technology has improved, and this has resulted in positional inconsistencies across the data. Where old methods focused on the relative accuracy of the distance measured between two points on a map and the true distance between the same two points; new surveying methods capture the absolute accuracy distance between the position of a point on a large scale map and assessing its true position within the reference frame using Global Positioning Systems (GPS). Why is Positional Improvement relevant to LPS customers? The increasing use of more sophisticated data capture equipment and the requirement to combine digital datasets within a Geographical Information System (GIS), makes the absolute positioning of spatial data more critical, especially for customers whose business systems are required to be GPS compliant. For customers who use LPS large scale mapping as a backdrop upon which they place their own data, any positional shift will have clear implications for the overlaid data in terms of positioning. To illustrate the impact of PI in a real business context, LPS have developed a case study which highlights the implications of PI in the data used by a utilities company. For more information and to view the case study, please use the link below: How to get involved or find out more? If you would like to talk to us about any aspect of PI in relation to your business, please contact us at PI@lpsni.gov.uk |
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