LinkedIn emplea cookies para mejorar la funcionalidad y el rendimiento de nuestro sitio web, así como para ofrecer publicidad relevante. Si continúas navegando por ese sitio web, aceptas el uso de cookies. Consulta nuestras Condiciones de uso y nuestra Política de privacidad para más información.
LinkedIn emplea cookies para mejorar la funcionalidad y el rendimiento de nuestro sitio web, así como para ofrecer publicidad relevante. Si continúas navegando por ese sitio web, aceptas el uso de cookies. Consulta nuestra Política de privacidad y nuestras Condiciones de uso para más información.
OS MasterMap is a database in that each feature is captured as a record in the data, and is given a unique identifier known as a TOID ® . This means that any feature is easily and consistently accessed and identified, making any changes to the data easier to apply. It also means the TOID can be used as a link (or key) to other data – for example, Ineligible features for SPS. With these unique identifiers (database keys), the data is ‘database ready’ – that is, can be loaded into a database system. That, in turn, means the data can be stored once in an enterprise’s information systems and shared by many applications in the organisation – eliminating the problems that would otherwise exist in ensuring data is uniformly consistent.
Photogrammetry is the science of measuring objects from photographs
Rural Payments Agency usage of Ordnance Survey data
Rural Payments Agency (RPA) usage of Ordnance Survey data Rupert Waite – RPA Geographic Information Services Peat Allan – Ordnance Survey
Contents <ul><li>Introductions </li></ul><ul><li>Recap on RLR Background & Business As Usual (BAU) updating process </li></ul><ul><li>Land change detection process within RPA </li></ul><ul><li>Concept of Land Change Detection </li></ul><ul><li>Use of OS Change Only Update intelligence. </li></ul><ul><li>Parallel activities. </li></ul><ul><li>Questions. </li></ul>
Rural Land Register (RLR) - Background <ul><li>Rural Payments Agency is responsible for Administering CAP in England. </li></ul><ul><li>The RLR is England's Land Parcel Identification System (LPIS) & holds approx 100 geographic layers (vector & Raster) </li></ul><ul><li>Circa. 2.4m Land Parcels on the RLR </li></ul><ul><li>Circa. 735K Permanent Ineligible features for Single Payment Scheme </li></ul><ul><li>Total Land Area circa 9.4m ha </li></ul><ul><li>Underpinning the definition of each Land Parcel is the Ordnance Survey digital topographic map dataset – MasterMap. </li></ul><ul><li>Ordnance Survey is Great Britain's National Mapping Agency. </li></ul><ul><li>The RLR is based upon the physical block ‘Topographic’ model. </li></ul>
Recap - RLR Business-As-Usual (BAU) ‘Re-active’ update process <ul><li>A central Geographic Information (GI) Services department with RPA manages the RLR (LPIS) </li></ul><ul><li>Routine BAU changes (Inspection, Remote Sensing, customer amendments) are submitted to GI Services as tasks. </li></ul><ul><li>GI Services operates a Black-box service to three agencies delivering SPS, Woodland Grant Scheme and Environmental Stewardship Scheme. </li></ul><ul><li>Quality standards are maintained through 100% QC of digitisation, data entry and parcel attribution. </li></ul>
Change Intelligence - Re-active versus Pro-active Inspection (Physical, Remote Sensed) Customer (RLE1) Scheme (Lit/RD/FC) RLR MasterMap (one-off data refresh) MasterMap (Change Only Update) Points of interest data Aerial Photography (imagery analysis) Systematic “Pro-active” Updating BAU “Re-active” Updating Remote Sensing (imagery analysis on non-controlled)
RPA’s Route-map for Proactive Land Change Detection. Geo-Processes Routine/Cyclical Data Quality checks Pro-active Detection Improved Controls More current & accurate GI Source Data Requirement Engage with data suppliers, OS and Defra over currency Enhanced Tools System development & software Implement Data exchange to and from OS Action Outcome New business Processes Improved RLR accuracy Accurate SPS payments COU processes for Mastermap & Aerial Photography Improved MI on compliance Work Stream 1 Work Stream 2 Work Stream 3
Conceptual Design – Systematic “Proactive” Updating Sources of information Mastermap COU RPA collected data RLR Update Multi-step process to apply COU, to thematic dynamic thematic layers. Geo Information Data Integration – Geo processes Points of Interest data Aerial Photography COU Remote Sensing
What is Ordnance Survey MasterMap Change Only Update COU? <ul><li>Updates to OS Mastermap are delivered to RPA/Defra in a 6 weekly cycle. </li></ul><ul><li>Changes are concentrated around specific areas that have been recently re-surveyed or flown. </li></ul><ul><li>Approximately 1.5% of Mastermap changes in a year. </li></ul><ul><li>Changes can be grouped into Real-World changes (RWC) and technical changes to the dataset. </li></ul><ul><li>Only some of the RWC will affect RLR land parcels and ineligible features </li></ul>
What kind of OS Mastermap change will RPA see through COU? Current RLR The application of this change to the RLR would result in a reduction in field size from 3.11ha to 2.71ha for the field SP0653 0973 NB: This field has been claimed this year at 2.81ha New building and fence added 18/06/2008 RLR & COU
With Aerial Photography 7 th July 1999 18 th June 2008
OS MasterMap topographic base data – the technical benefits to RPA <ul><li>What does it mean? </li></ul><ul><li>Each feature in the Ordnance Survey database has its own unique identifier </li></ul>Unique feature identifiers (TOIDs) <ul><li>Features in MasterMap are classified by descriptiveGroup into themes: For example, Administrative boundaries, Buildings, Heritage and antiquities, Water, Land, Rail, Roads, tracks and paths, Structures, Terrain and height </li></ul><ul><li>RPA has identified 12 feature types within the themes that can be identified with high confidence and auto-captured as ineligible features. For example, all ponds are ineligible and safely removed upon receipt of a COU file. </li></ul><ul><li>Benefits? </li></ul><ul><li>Easier management of data changes e.g RPA can filter our TOIDS that are not relevant to the LPIS(RLR). </li></ul><ul><li>Can link to other underlying data e.g A TOID can be linked to an LPIS parcel. </li></ul><ul><li>Database ready for intersect/spatial analysis. </li></ul>
Parallel Work streams for RPA Land Change Detection Imagery (RS & AP) OS MasterMap Source of change only update Change detection using Photogrammetry Change detection using database intersect and TOID analysis Candidate list of parcels to digitise. 2633 TQ7840 7840 TQ3845 4505 TQ3830 2874 SU 2846 3648 SU2749