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John Cartledge talks through data collection today and in the future
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Ordnance Survey
Data Collection today and
in the future
John Cartledge Strategic Business Development Manager
May 2013
• Ordnance Survey has developed and maintained a
National geographic database of Great Britain since
1791
• Civilian organisation since 1983; 1150 staff
• Independent Government Department and Executive
Agency reporting directly to a Government Minister
• Trading Fund since April 1999
• Headquarters in Southampton with 28 field offices
around Great Britain
Ordnance Survey has always
surveyed change
• Creates and maintains the ‘master map’ of Great
Britain from which others derive benefit
• Manages complete national large scale digital data
down to building level detail
• Maintains a database of ½ billion features with
approximately 5,000 changes made daily
• A commitment that real world features are
represented in the database within six months of
completion on the ground (the NGD)
• From the database, Ordnance Survey produces a
range of digital data and paper maps for business,
leisure, educational and administrative use
Provides the underpinning geographic framework for
Great Britain
Ordnance Survey today
Formerly a total reliance on field operations
But now …. the technologies and pace have improved
…
Two sides of Ordnance Survey
• We sell around 2 million maps per year to the
consumer market, representing around 7% of our
trading revenue
• Elegant and reliable mapping is at the heart of
our public brand
• Around 10% of Britain’s GDP is underpinned by our maintained, high-resolution data
• Maintaining a detailed database is the core of our business today
The need for a referencing framework
• In Britain there are well-established sources of base information
• There are many established users with different applications
• The challenge - establish principles to make information sources
accessible and connectable
Address
Building
Fire records Census
Education Housing
Stock (condition) Property tax
A geographic database… to what benefit?
• Intelligent data enabling integration of public and private data
– every feature uniquely identified
OS OpenData - Datasets
• OS Street View
• 1: 50 000 Gazetteer
• 1: 250 000 Colour Raster
• OS Locator
• Boundary-Line
• Code-Point Open
• Meridian 2
• Strategi
• MiniScale
• Land-Form PANORAMA
• OS VectorMap District
OS OpenData supporting public service delivery Nottinghamshire County Council grits A and B roads and major bus routes,
which account for about a third of the county’s road network, during the
winter weather. The Council produced the map below using OS OpenData to
show its residents which routes are gritted.
OpenSpace Examples
New address products
AddressBase™ Premium Represents the full lifecycle of an address or
property
AddressBase™ Plus A current view of an address or property
AddressBase™ A current view of a mailing address providing
its precise location.
Products created from the GeoPlace Hub
AddressBase™ AddressBase™ Plus AddressBase™ Premium
Everything happens somewhere
I want to …
my data
display
as points
on a map
Capturing and maintaining our Data
How do we store the data and maintain
currency?
• Instead of maintaining a static
map we update and maintain a
database in layers and
themes
• We aim to collect once and
use many times
• 99.6% of significant features
are represented in the
database within
six months of completion
What we collect
To meet customer needs we collect many different types of data:
More than 500 million different features are mapped in detail.
Imagery Topographic features Networks ADDRESS
North Swindon – peri-urban development
October 2004 February 2005 August 2005 February 2006 August 2006 February 2007 August 2007 February 2008 August 2008
Our change
intelligence
engine
• a national picture of what is
changing and where
• >1m house units of current
changes known, of which
200k are ready for survey
Updating the National Geographic Database
Field survey
Aerial survey &
photogrammetry
Data from
external sources
500 million
records
5,000 daily
House Unit
changes
Cu
sto
mers
National
Geographic
Database
Change
intelligence
Collecting the data
5000 changes made to the
central database every day to
reflect the dynamic landscape
in which we live.
Data currency:
All major change is captured
within 6 months of completion.
Field data capture technology:
Heavy investments in RTK GPS – OS Net
Typical Installation
OS Net
• Near national 1-3cm 3d GPS
coverage achieved
• GPS+GLONASS network in place
around London
• Free GPS products from;
www.ordnancesurvey.co.uk/GPS
Collecting the data
Remote Sensing
We capture up to 60,000km of photography each year which are
used in production for updating our Imagery, Height and TOPO
products.
Height
Topography
Imagery
Image
Acquisition
Image Processing
Image Capture
Managing our Data and Creating Products
Geographic information continues to come of age
• The last 2-3 years have seen a sea-
change in capability, capacity and demand
within the GI market – in terms of data,
software/systems and from users in terms
of their requirements
• As technological constraints recede, users
are demanding much more – not only of
content in its own right but also in terms of
how it is structured to better model (rather
than simply depict) the real world
What are our users are looking for?
Customer feedback over the last year has remained consistent and
given us strong guiding principles for:
• Consistency of content between legacy scales
• Increased cartographic flexibility
• Structural representation of topographic features - greater
emphasis on what a feature is in addition to what it looks like
from above
• More feature attribution and maintenance requirements
• A shift from a 2D data structure to one which is 3D-ready
• Greater usability – especially in ordering, order fulfilment and
consumption
Products which add
context to user information
and for which cartographic
design is essential
Machine readable data
products which provide
structure and descriptive
information and to which
users can add their own
reference information
Services which enable ease of access and greater usability
across our portfolio of products
Greater simplicity in our portfolio
Digital
Terrain/Surface
Models
Heighted surface
features
Heighted
elevated features
National
Geographic
Database
What does ‘3D’ mean?
Ordnance Survey’s 3D parameters
Survey standards
Underpinning,
interoperable, analytical
Maintained
Nationally consistent
Economically viable
What does ‘analytical’ mean?
• Which buildings are taller than 50m and are within 200m of the
railway?
• How do I reach the shop I’m looking for on the third floor?
• What addresses are at risk from high winds?
• Which areas of the city are quietest?
The output more and more is NOT a map, but an
answer to a question
Conclusions
• National mapping agencies are relied upon to provide an
underpinning geographic referencing framework
• Expectations and requirements are changing dramatically
• Products need to be both spatially and temporally joined-up
• Many applications require continual maintenance of geographic
features throughout their lifecycle
• All parts of the supply chain need to work more efficiently to
deliver and utilise change information to the end user