mastermap
DESCRIPTION
MasterMap. David Medyckyj-Scott Emma Sutton Tim Urwin. Aims for the workshop. To remind you about OS MasterMap To begin to raise awareness (again) To seek your input Are original requirements still valid? Have new requirements appeared? Is the timetable sensible? - PowerPoint PPT PresentationTRANSCRIPT
MasterMap
David Medyckyj-ScottEmma Sutton
Tim Urwin
Aims for the workshop
• To remind you about OS MasterMap • To begin to raise awareness (again)• To seek your input
– Are original requirements still valid?– Have new requirements appeared?– Is the timetable sensible?– What sort of support is required?
* for users* for support staff
• To identify any other issues
OS MasterMap – a Framework
Digital Terrain Model
Imagery
Topographic themes
Land Use
Transport Network (ITN)
Admin Boundary
Points of Interest
Pre-Build
OS MasterMap
• A seamless database reflecting the real world, with polygons representing man-made and
natural features – topographic data have been restructured into a
seamless database of 416+ million objects * fundamentally different to tile-based Land-Line data*
• Delivered in new format, Geography Markup Language (GML)
• Delivered in new ways– by theme– by user defined area– Change only Update (CoU)
OS MasterMap - Topography
TOIDs – Unique reference IDs
• A unique identifier for each object
– Allowing individual feature identification
• With a defined lifecycle and version number
Feature supply – not tile supply!
• Builds on object oriented model
• Full extent of data crossing the area of interest is supplied
• Results in the supply of “hairy” data
Chunk Bounding Box
Chunk Extent
Integrated Transport Network
• ITN links reference the Topography Layer
TOID 4000001298764523Version 1Change Date 310303
Descriptive Group Road TopologyDescriptive Term Local StreetNature of Road Single CarriagewayLength 42
Start Node 4000004756364758End Node 4000009857364528Reference to Topo 1000000139421883,
1000000139417597
OS MasterMap - benefits
• Access to modern data
• Consistent, national framework for referencing geographic information allowing data to be linked more easily– Topographic Identifiers (TOIDs)
– data which can be exchanged and shared
• Pre built polygons improves quality and means better cartography
• Richer attribution, for more versatile classification of features, more intelligent data and better analysis
• Greater control over supply e.g. themes and COU
• New possibilities in terms of both end use and types of services that can be offered
The service
Mapping
• Digimap Carto and Classic will be modified to serve MasterMap instead of Land-Line
• Users must have the ability to – view cartographic quality maps produced using the
MasterMap topographic data.– select particular themes of interest and feature type to view
in the map– generate and download a cartographic quality map for
printing. Formats offered will be GIF, EPS and PDF. – produce a map combining themes and layers from MasterMap
Topographic with other OS mapping products– And maybe select a feature on the map and request attribute
information, such as its area or when it was last updated
Q. What should we do with ITN?Q. Is there a need for maps with Land-Line style cartography?
Data supplyMust• All data delivery is online• User defines areas of
interest either interactively on-screen or using a selected predefined administrative boundary
• Large requests are split into manageable "chunks"
• All GML provided must be virtually identical to that which would be supplied by OS
Could• Option to download data in formats
other than GML i.e. shape, mif/mid, DXF• Option to take complete re-supply• Access to historic data
Should• Option to select one or
more themes of data for an area of interest
• Option to request changes only once initial supply has been taken
• Large requests processed overnight
• Requests can be bookmarked to run again at a later date
Support
• User requirements – have we got them right?• Best delivery method for support?
– e.g. web and paper documentation
• Training required for…– site reps– users (this is NEW for EDINA)
• Guidance for institutions?– responsibilities– software and data management issues
• Awareness raising will be important– importance of local support, local experts
Timetable
• Jan 2006 – Project Kick off– Re-engagement with user community commences
to affirm user requirements.
• Autumn 2006 - alpha version available for expert user testing
• Early 2007 - beta version available to a wider group (early adopters)
• August 2007 - full release
• July 2007 – Land-Line withdrawn
How you can be involved…
• be part of a focus group to verify user requirements
• be an “expert user” early adopter• be an early adopter institution• provide feedback on current use of
MasterMap– we know OS have provided OSMM for project
work…
• participate in online discussion forum
Issues and implications
• Initial supply online…• No more “real time” data delivery for large
requests
Any other points you want to make?
Thank you
User consultation and findings in 2002• Star gazing exercise
• Questionnaire survey– Predicted use: Research 86%, Teaching 49%
– Update frequency: 40% annual, 38% twice yearly, 15% more frequently
– 54% want access to change only updates
– strong desire for formats other than GML
– 60% felt users would need MM use training
– 50% felt users would need MM data management training and 40% support in data management