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Presentation by Rupert Waite from the Rural Payment Agency geographic information services about the use of Ordnance Survey data in their processes.
Citation preview
Rural Payments Agency (RPA)
usage of Ordnance Survey data
Rupert Waite – RPA Geographic Information ServicesPeat Allan – Ordnance Survey
Page: 2
Contents
Introductions
Recap on RLR Background & Business As Usual (BAU) updating process
Land change detection process within RPA
Concept of Land Change Detection
Use of OS Change Only Update intelligence.
Parallel activities.
Questions.
Page: 3
Rural Land Register (RLR) - Background
Rural Payments Agency is responsible for Administering CAP in England.
The RLR is England's Land Parcel Identification System (LPIS) & holds approx 100 geographic layers (vector & Raster)
Circa. 2.4m Land Parcels on the RLR
Circa. 735K Permanent Ineligible features for Single Payment Scheme
Total Land Area circa 9.4m ha
Underpinning the definition of each Land Parcel is the Ordnance Survey digital topographic map dataset – MasterMap.
Ordnance Survey is Great Britain's National Mapping Agency.
The RLR is based upon the physical block ‘Topographic’ model.
Page: 4
Recap - RLR Business-As-Usual (BAU) ‘Re-active’ update process
A central Geographic Information (GI) Services department with RPA manages the RLR (LPIS)
Routine BAU changes (Inspection, Remote Sensing, customer amendments) are submitted to GI Services as tasks.
GI Services operates a Black-box service to three agencies delivering SPS, Woodland Grant Scheme and Environmental Stewardship Scheme.
Quality standards are maintained through 100% QC of digitisation, data entry and parcel attribution.
Page: 5
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)
Page: 6
Geo-Processes
Routine/Cyclical Data Quality
checks
RPA’s Route-map for Proactive Land Change Detection.
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
Page: 7
Geo Information Data Integration – Geo processes
Conceptual Design – Systematic “Proactive” Updating
Sources of information
Points of Interest data
Aerial Photography
COU Mastermap COU Remote Sensing
RPA collected
data
RLR Update
Multi-step process to apply COU, to thematic dynamic thematic layers.
Page: 8
What is Ordnance Survey MasterMap Change Only Update COU?
Updates to OS Mastermap are delivered to RPA/Defra in a 6 weekly cycle.
Changes are concentrated around specific areas that have been recently re-surveyed or flown.
Approximately 1.5% of Mastermap changes in a year.
Changes can be grouped into Real-World changes (RWC) and technical changes to the dataset.
Only some of the RWC will affect RLR land parcels and ineligible features
Page: 9
What kind of OS Mastermap change will RPA see through COU?
Current RLR
New building and fence added 18/06/2008
RLR & COU
The application of this change to the RLR would result in a reduction in field sizefrom 3.11ha to 2.71ha for the field SP0653 0973
NB: This field has been claimed this year at 2.81ha
Page: 10
7th July 1999 18th June 2008
With Aerial Photography
Page: 11
OS MasterMap topographic base data – the technical benefits to RPA
What does it mean? Each feature in the Ordnance Survey
database has its own unique identifier
Unique feature identifiers (TOIDs)
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
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.
Benefits? Easier management of data
changes e.g RPA can filter our TOIDS that are not relevant to the LPIS(RLR).
Can link to other underlying data e.g A TOID can be linked to an LPIS parcel.
Database ready for intersect/spatial analysis.
Page: 12
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
SU2749 3648
SU 2846 2874
TQ3830 4505
TQ3845 7840
TQ7840 2633
Candidate list of parcels to digitise.
Page: 13
Questions?