Why DNF for Highways

1
Why DNF for Highways Utilities solving data
management issues and enabling data sharing

• Dave Simmons
• David C Simmons GIS Consultants
• Working for GIS-based interoperability
• AGI DNF Roadshow London June 22nd 2006

2
Solving Data Management issues..

• Our aim is e-government and interoperability
• We have different sets of local data for
  different purposes and are seeking to interrelate
  information
• We are aggregating such local data sets and
  trying to use them more widely
• But
• We are often creating data locally using
  descriptions rather than geographic objects
• ?? How can DNF help ??

3
The Highways and Utilities Workshop- common
challenges we face?

• Problems with USRNs - (using examples of trunk
  roads, named urban streets and rural highway)
  how do we get better streetworks management ?
• How to get national consistency whilst allowing
  for local input?
• How do we get a good representation of
  adopted/S38/private highway extents ?
• Problems with Linear Referencing (using examples
  from UKPMS) How do we get national consistency
  ?
• Problems with associating properties to buildings
  and highway how do we know what addresses share
  buildings and how they relate to conditions on
  the highway ?

4
Highways and Utilities Workshop- Discussion on
Ways DNF can help ?

• Overcoming the problems of just using names and
  descriptions to form USRNs
• Resolving the problems of Streets for highway
  maintenance and as part of the property address
• Developing methodologies for customising and
  extending a national base road network in a
  consistent way
• Making linear referenced networks more
  consistent and mappable
• Relating property to buildings and highway
• Exploiting surveyed Highway Surface topography
• Relating Services to the highway and to each
  other

5
Highways and Utilities Workshop Solving Data
Management issues

• Examples of
• Current road referencing schemes
• And their implications

AGI DNF Roadshow London June 22nd 2006
6
Some examples .. from street works of how major
roads are currently being referenced

• Northants M1 Northamptonshire (ONE USRN-
  82719673)
• Milton Keynes M1 CARRIAGEWAY BETWEEN NPSA AND
  NCC BOUNDARY
• Notts M1 Southbound J27 to J26
• Essex "M11 BETWEEN JUNCTIONS 8 AND 9","SAFFRON
  WALDEN","WENDENS AMBO" one of eleven parish
  choices of USRN for this (non-directional)
  stretch of M11
• Hants A34 TRUNK ROAD (ONE USRN)
• W. Berks A34(T) SOUTH-A4 TO BND
• OxfordUNNAMED-A34-Dual Carriageway (6803726-
• ITN Link Toid 4000000019194697)
• DNF can be used to map sections to the underlying
  geography

7
An example of referencing (by name)in urban
streets..

• DYKE ROAD, BRIGHTON USRN 4401082
• Spans 34 separate links
• Nearly 3 km long.
• Starts junction with Queen Square as the B2066
• Continues northwards as the B2121,
• is then interrupted by a part of Bath street,
• Continues north from the Goldsmid road
  roundabout as the A2010
• Continues north of the Old Shoreham Road (A270)
  as unclassified road
• Access for 861 properties across 41 post codes,
  from 29 links of which 9 are unclassified (405
  props) 7 are A road (161 props) 13 B road (295
  props)
• ONE LINK has 179 properties
• Dyke Road/ Upper North Street junction has
  traffic lights that are critical
• from 4 to 6.30 pm on weekdays (where it is the
  B2121)
• Later we see how DNF might be used to improve the
  information for this street

8
Survey and Maintenance on Southern Bypass (Dual
Carriageway around Oxford)County and Highway
Agency Linear networks

• Southern Bypass is a single USRN 41601097 (Type
  1)
• It has 50 links (28 are A423 County, 22 A34 -
  HA )
• WDM (UKPMS) and County Highway maintenance
• 10 for A34 directional carrriageway,4 for A34
  slip roads
• 4 for A423 between roundabouts and 2 roundabouts
• Highways Agency
• (same) 10 sections(A34 inter-junction) and 4
  slip roads
• DNF can separate the different areas of
  responsibility, and underpin and Cross-reference
  the HA and County sections

9
A34 Dual Carriageway Southbound from A423
Roundabout to Bagley Wood Road

• WDM Section code A34/264
• Highways Agency Section 3100A34/264
• LSG section UNNAMED-A34-Dual Carriageway (USRN -
  41603371)
• ITN Link Toid 4000000019182605
• All reference the same piece of road so data can
  be interrelated.
• This is because of the approach to NSG taken in
  Oxfordshire, coupled with happy chance that this
  piece of road does not happen to have an official
  name !
• DNF can enable link-level precision

10
A rural example Great Coxwell, Oxfordshire 3
USRNs share 1 access ESU but 2 USRNs are needed
only for property addresses
DNF can be used to help connect each property to
its section of highway
11
An Oxfordshire LLPG Placeholder this is
atype 1 street but it just supplies an address
so that Sainsburys can be entered into the LLPG
DNF can connect the property to its highway
without affecting its postal address
12
An example of road section referencing from UKPMS
..

• U301055/000,ALKRINGTON PARK ROADMANCHESTER OLD
  ROAD - GREENSON DRIVE
• U302032/000,BANK STREETDERBY STREET - CLOSED
  SIGNHEYWOOD
• U302095/000,BELFIELD ROADBELFIELD LANE -
  300MROCHDALE U302161/058,BIRTLE RD250M NTH.PACK
  HORSE INN-BIRTLE GREEN FARM HEYWOOD
  U302402/000,BRAYSHAW CLOSE HEYWOOD. EGERTON ST.-
  FENCE LINE Nos. 24/26.
• U383157/000,CLEMENT COURT F/PSUB STATION - 40M
  WEST
• U303316/050,CROWSHAW DRIVE ROCHDALE. NE BDYS
  Nos. 19/30 - END OF F/WAY.
• U304065/028,DICKENGREEN LANEFOOTBRIDGE -
  2NDSUBWAYROCHDALE
  U305019/000,EAST STREETRAMSDEN RD - END OF PAVED
  SECTIONWARDLE U307164/026,GORRELS
  WAY300M - SENCO LTD LC 31ROCHDALE
  U383166/000,LEANDER DRIVEF/PBTWN NOS
  19/21 - END OF STEPS
  U323201/015,WOODHOUSE LANEBDRY NOS56/58 -START
  OF DIRT TRACK ROCH U318154/000,REDDYSHO
  RE RDCALDERBROOK RD - STREAMLITTLEBOROUGH
  U313087/067,MAYFIELD ST. ROCHDALE.
  CYCLEWAY - BELFIELD RD.
• Footpaths, cycleways, bridges, paved, lamp
  columns, streams,any convenient observed
  feature as a
• section end-point
• DNF can help to standardise and map section
  definitions

13
Enabling data sharing by putting DNF principles
into practice examples from Oxfordshire, Isle
of Wight and Brighton

• Local Street Gazetteer
• Linear referencing
• Property referencing
• Buried Services

Dave Simmons David C Simmons GIS Consultants
AGI DNF Workshop June 2006
14
Before DNF, Oxfordshire had...

• A locally digitised networkout of step with
  Ordnance Survey data.
• LLPGs increasingly generating conflicting
  streets.
• Poor communication between county/districts.
• No common county/district GIS base.
• Drift between UKPMS, EXOR, NSG networks making it
  very difficult to achieve good asset recording
  and interoperability.
• ...Yet resource intensive in both district and
  county.
• Ref Oxfordshire LSG-DNF Case Study

15
Building the DNF LSG using ITN

• Separate genuine highway streets from property
  street placeholders
• Create "ESUs" from ITN (using it as a DNF Base
  Reference Network).
• Identify them using ITN TOID (Link identifier).
• Formalise communication between districts and
  county highways.
• Cooperate with OS to improve ITN (using local
  input allied with strict OS Survey Rules)
• Use improved ITN to identify all Highway Streets
• Use ITN Road Toids (as associated reference
  information) and associate 11 with USRNs
• Associate each unnamed section with just one ITN
  Link Toid
• Hence publish LSG with 11 ITN references
• Note BS7666 revision is encouraging
  cross-referencing and classification
• Ref Oxfordshire DNF-LSG White Paper

16
Oxfordshire The Results (so far)

• Streetworks location queries at a low level.
• Better location possible (see Mayrise example).
• Struggling with local digitising is eliminated.
• Good relationships with districts now that
  ITN-NSG forms a sound common base that fits with
  MasterMap and Land-line.
• District LLPGs improving on a sound base.
• ITN has been improved through feedback to OS.
• ITN network poised to provide interoperable
  linear networks for maintenance and UKPMS.

17
Using the DNF NSG and (AddressLayer 2
-style)property links to locate streetworks

• Screenshot courtesy of Mayrise systems

18
Extending the base generating a C class
coverage for the Isle of Wight from ITN Links
Ref Forthcoming Isle of Wight DNF case study
19
Improving ITN through local feedback -Naming ITN
unnamed Links
20
Adding local paths to the ITN base using DNF
linear architecture principles in IOW
21
Adding Byways, Bridleways and Footpaths
22
Using the built-in DNF links from ITN to OSMM
Topography to classify the road surface in IOW
23
Using DNF to split road surface into
Public/Private for a single Link

• ITN Link osgb4000000026156726 is part private
• Topo Area osgb1000000159056310 has been split

24
Using ITN Links as a sound asset survey base

• Bus Shelter on Link osgb4000000026162810 at
  34m,4m

Asset Survey on IOW by John Reid Consultancy
25
How the ITN DNF links can find the A2010 part of
DYKE ROAD in Brighton
26
locating Properties on the A2010 part of Dyke
Road with AddressLayer 2 DNF references
27
Non-Postal Objects on the A2010 part of Dyke Road
Using AddressLayer 2 DNF references
28
Utility Services around Overmead Green Oxford
(Overmead Green has multiple highway accesses and
so is defined as an LLPG Placeholder in the
Oxfordshire LSG )

• Cold Water is blue
• Gas is Yellow
• Sometimes they run together
• Sometimes traffic is not affected
• How do we best use DNF identifiers to help with
  coordination and notices?
• Buried Services studies are underway using DNF
• principles

29
Conclusion - the role of DNF to solve data
management issues and enable data sharing ?

• Names and descriptions alone do not form a usable
  base reference system this problem needs to be
  better explained and understood
• Without a DNF base, such references can cause
  expense, confusion and a host of interrelated and
  intractable problems
• The base reference needs to be of geographical
  objects of physical and operational significance,
  which DNF can provide.
• Migration and some re-engineering are essential,
  practical and possible given goodwill as has
  been demonstrated in Oxfordshire and elsewhere