designing mapping databases for the future: ukmap - the next generation - by seppe cassettari

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Designing Mapping Databases for the Future: UKMap – The Next Generation

Dr Seppe CassettariThe GeoInformation Group

1963 – 2013 CELEBRATING 50 YEARS OF THE BRITISH CARTOGRAPHIC SOCIETY

The GeoInformation Group

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The UKMap Programme

Conceived in 2007 with Edition 1 of the SpecificationData capture commenced in early 2008Announced in June 2009Edition 1 published in November 2009Edition 11 to be published September 2013

Initially London captured


Extended into other areas, including rural locationsFirst overseas pilot in progress

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The UKMap Model

Topo

Thematic

• More than one map layer to accommodate overlaying features

• Multiple attribution linked through common

UKMap

Topo Topo

Overlay

UKMap

Topo Topo Base

layer

UKMap Topo

Points

UKMap Topo

Address

UKMap Topo

Building Height

Polygon map data

Point map data

Tables

Unique Classification Code (UCC)

UKMap Thematic

5k

UKMap Thematic

25k

UKMap Thematic

100k

UKMap Thematic Boundary

UKMap Thematic Network


references

UKMap Topo Ortho

UKMap Topo

Terrain

UKMap Topo

Points of Interest

Raster data

Network

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The UKMap Principles

The idea of multiple map layers tied together by tt ib tiattribution...

The strength lies in the attributes:• 265 land use codes in a 4 level hierarchy• 8 land cover type codes• Creates over 1500 combinations for a single

polygon


polygon

Polygons making up a residential property can be subdivided by ‘building’, ‘paved areas’ and ‘vegetation’

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The Next Generation

• Currently preparing Edition 3 of the Specification

• Planned as major step forward in the way we handle complex 3D environments within 2Drepresentations


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The Problem(s)

• How to handle multiple overlaying, but not necessarily inter-connected, features in 2Dmapping terms?

• How to establish relationships between features and objects that do link?

• How to create inter-connectivity through structured attribution?

• How to make the data usable in currently available


software solutions?

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The Problem

Canary Wharf, offices andoffices and

retail, and the DLR...


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Mapping something we all inherently understand?


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Six Retail floors, partly below ground


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Mapping something we all inherently understand


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Pulling apart the 3D world

• Decisions have to be made:• What is considered to be ground level?• Are there features that are above ground?• Are there features below ground?• What are the relative height displacements between

features, relative to the ground?• Does one feature, like a railway line, exist in all three

levels?• Are there features which connect between one layer and

th ?


another?

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Pulling apart the 3D world

Offices with connections to anunderground retail level and

then connected to a station at athen connected to a station at a lower level

One object, a railway line , is at ground level, th b i b id


then above a river on a bridge and then in a tunnel

The blue line is ground surface or Base level. Each feature has a position relative to Base and if not mapped on base is on the ‘Overlay’

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Principles to mapping

• Determine ground level• This may be variable relative to datum

• Map all features at ground level and attribute as the Base layer.

• No overlapping polygons and no gaps

• Identify all features at different levels above ground and map each independently on the ‘overlay’ layer.

• Overlapping polygons permitted


• Attribution defines level relative to Base• Add relative height code to denote separation from Base

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Principles to mapping (2)

• Identify all features at different levels below ground and map each independentlyp p y

• Overlapping polygons permitted• Attribution defines level relative to Base• Add relative height code to denote separation from Base

• Where features in one map layer connect to features in another layer, locate and add ‘Connectors’

• Connectors are small polygons which join features in two or more layers


or more layers• Common reference attribution is used to establish linkage

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How it works


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How it works


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Cartographic Challenge

• The complexity of the mapping presents a number of cartographic challenges.

• Multi layer viewsMulti layer views• Dynamic representations• 3D extrapolations• Symbolisation options

• Looking for partners to produce experimental cartographic representations of the Canary Wharf database.


• Plan to run a competition at the start of 2014 with a significant cash prize to stimulate cartographic innovation

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Thank you

The GeoInformation GroupTelford HouseCow LaneFulbourn


FulbournCambsCB21 5HBt 01223 88007www.geoinformationgroup.co.uk

designing mapping databases for the future: ukmap - the next generation - by seppe cassettari

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