Sep. 21-22, 2006v FME Worldwide User Conference - Vancouver

David Eagle – Consultant / TrainerDotted Eyes Ltd, UKdavid.eagle@dottedeyes.com

Production of Ordnance Survey Meridian 2

OS Meridian 2 2

Authorized Reseller based in Birmingham, England

Established in 1989; now 28 people

Working with Safe Software for 10 years

UK distributor of ‘all things’ FME!

Stock and sell Safe Software products

FME training – two-day course

Consultancy projects using FME

Support by phone & e-mail (support@dottedeyes.com)

Embed FME Objects into our own software products

Who are Dotted Eyes?

OS Meridian 2 3

Strategic Partnerships

MapInfo Premier partner

Oracle Partner specialising in Spatial and

Locator applications

Ordnance Survey Platinum partner; supplier of consultancy

and software

Safe Software (FME and SpatialDirect) Reseller & OEM using FME Objects

OS Meridian 2 4

What Else Do We Do?

Development and consultancy services in GI

Rich internet applications – ResponseMX

AJAX or Flash for cross-browser compatibility

Java EE n-tier architecture on the server

Developer framework with sample applications

Used in banking, local and central government,

emergency services, crime and disorder reduction

www.dottedeyes.com\rmx

OS Meridian 2 5

What is Meridian 2?

Ordnance Survey vector topography products: OS MasterMap formerly Land-Line (1:1,250 & 1:2,500) Meridian 2 (about 1:50,000 or 1:100,000) Strategi (1:250,000) Mini-Scale (1:1,000,000)

Digital representation of Great Britain Road, rail, coast, hydrology, woodland, positioned text Admin boundaries, developed land use areas (DLUA)

Topologically structured polygons, polylines & points geometry with positioned text features

Supplied as tiles in NTF and GIS / CAD formats

OS Meridian 2 6

What’s Our Role?

We created the product in the year 2000 Contributed to discussions about content and form Final decisions on specification rested with OS Finished roads data supplied by Ordnance Survey

We’ve produced annual ‘refreshes’ since then The content is entirely renewed every year Well accepted by the market, so specification changes

are now resisted

Conflation of data from a variety of sources

Strategically the process is a stop-gap measure Long-term aim is to use automated generalisation Major challenge, as the factor of scale change is 20x

OS Meridian 2 7

Derived From:

Meridian 2Meridian 2Land-LineRailway & stations

Boundary-LineCounty, District, Unitary

OSCAR Route-ManagerRoads

StrategiDLUA, Woodland, Hydrology, Text

LandForm PANORAMACoastline

Several OS products are the source for Meridian 2

OS Meridian 2 8

Roads

Railway & stations

Coast

Admin boundaries

DLUA

Hydrology

Woodland

Text

OS Hierarchy of Feature Type Positional Quality

Important

Less Important

OS Meridian 2 9

The Annual Refresh of Meridian 2

1.Compare updated sources againstthe mid-scale database we maintain

2.Apply changes to meet specification

3.Quality Assurance on edited data

4.Build the topological structure of nodes, edges and faces

5.Write NTF (National Transfer Format)

6.Convert to MID/MIF (including styling), ESRI Shape and DXF

OS Meridian 2 10

History

No FME workbench available in 2000

Semantic mapping files were created

Workflow was imported when workbench

became available

Subsequently enhanced

and made more efficient

Refined each year with

experience

OS Meridian 2 11

QA with FME

Example rule 1…

Polygon layers must not overlap each other

Edges can snap

FME finds overlaps

Woodland extent is clipped

Coastline overlap is resolved

Woodland

Coast

DLUA

OS Meridian 2 12

Example rule 2…

New connectivity nodes if new rivers are captured

New nodes introduced where rivers join coast

QA with FME

OS Meridian 2 13

NTF Preparation

Lake.tab

Lake Node.tab

Lake Link.tab

Lake Seed.tab

(Lake Tiled.tab)

Create link and node network

OS Meridian 2 14

NTF to supply formats

Translate from NTF to:

DXF

MID/MIF

ESRI SHAPE

Using TranspOSe

Includes embeded FME technology

OS Meridian 2 15

Meridian 2 Transformers Hall of

Fame

3. PolygonBuilder to construct

features

2. LineOnAreaOverlayer to produce

neat lines

Input: Tile lines & Lake polygons

1. Tester – Simple yet effective!

OS Meridian 2 16

Summary

We use FME for format translation, but…

It saves us time and money in the QA routines

that it performs on project data

Ordnance Survey customers receive a product

of high quality and integrity

Dotted Eyes customers efficiently and quickly

manage data from National Mapping Agencies,

with FME Objects offering many output formats