DDMA / Mapscape: Datakwaliteit
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Transcript of DDMA / Mapscape: Datakwaliteit
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Event: DDMA DQ Dag
Thema: Dag van de Datakwaliteit
Spreker: J.H. Moll - Mapscape
Datum: 7 oktober 2008 – BIM Huis
www.ddma.nl
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Copyright © Mapscape B.V. | J.H. Van Moll | 2008-09 2
Towards a Quality Model for Digital Navigable Maps
Case Presentation for the Dutch Quality Award 2008
J.H. Van Moll
Dutch Quality Award 2008
October 7th 2008, Amsterdam, The Netherlands
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3Copyright © Mapscape B.V. | J.H. Van Moll | 2008-09
Agenda
• Introduction• Basics of digital maps creation• Digital maps and quality• Challenges of verifying map quality• Verification approaches• Company-wide quality initiative: towards a Quantitative Quality Model• Our experiences
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4Copyright © Mapscape B.V. | J.H. Van Moll | 2008-09
Introduction
• Spin-off company from Siemens VDO/Continental• Independent since November 1st, 2007• 20+ years of experience in:
• digital map related processes,• tooling,• navigation data supply chain,• automotive requirements and quality
• Data aggregation, map compilation, map testing
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Data
collection
Data
export
Aggregation,
Transformation
Product Testing
Paper sources,
Government data,
Automobile clubs,
Travel guide
publishers
Nav system
manufacturers
e.g. Elektrobit,
Blaupunkt,
Continental
Automotive OEMsField captured data
3D images & videos
Mother database
Map
halfproducts
Golden
Product
Masters
Replication
Replication
GDF
Basics of Digital Map creation - 1
5Copyright © Mapscape B.V. | J.H. Van Moll | 2008-09
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6Copyright © Mapscape B.V. | J.H. Van Moll | 2008-09
Basics of Digital Map creation - 2
• Network of attributed Nodes and Chains
Example:
c1
c3
c2
c9c4
c5
c8
c7
c6
Node:•Id•Coordinates•Height•Junction type•…
Chain:•Id•Node-pair•Length•DirectionOfTraffic•Road Class•Form of Way•Access•Slope •Width•Turn restrictions•Road condition•…
n1 n2
n4
n3
n5
n6
n7
n8
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7Copyright © Mapscape B.V. | J.H. Van Moll | 2008-09
Digital Maps and Quality
Dangerous guidance advice„Follow the main road“
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8Copyright © Mapscape B.V. | J.H. Van Moll | 2008-09
Digital Maps and Quality
DESTINATION“In 200 meters turn right”“In 200 meters turn right”
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9Copyright © Mapscape B.V. | J.H. Van Moll | 2008-09
Digital Maps and Quality
• Truth value of data (e.g. Points of Interest POIs )• Select a POI „docter“ and be guided to a private address
instead of the medical center• Select POI „McDonalds“ in a harbor and it turns out that the
restaurant is on the ferry boat (...that just left the harbor)• „Non-ethical“ coding: former concentration camps coded as
„tourist attraction“
Recently conducted UK research: • > 300.000 accidents caused by
navigation devices• ‘blind’ follow-up of guidance
advice: > 1.5 million drivers performed dangerous manoeuvres
Driver (72) caused a severe traffic accident by entering an exit-ramp of a highway near Cologne
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10Copyright © Mapscape B.V. | J.H. Van Moll | 2008-09
Challenges of map verification
Facts: • a map database represents a physical reality and when data
elements are combined, they create a semantic meaning• Large amounts of multi-sourced data (..can‘t test all)• Reality continually changes !!
• How to measure representativeness/correctness of the data?• How to determine acceptance criteria?• How to express map quality?
For a UK map:
# chains > 3.500.000
# nodes > 2.600.000
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11Copyright © Mapscape B.V. | J.H. Van Moll | 2008-09
Verification Approaches
Logical analysis approach• Focus on detection and analysis of logical map defects and
inconsistencies, risk-based• Quality profile guides in assessing severity of map defects
MLogical
analysis
Analyse
resultsR
Q-profile
Map
Specs
?Determine
Pass/Fail
Full or
semi-automatic
verification
R = P * I
(I leads)
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12Copyright © Mapscape B.V. | J.H. Van Moll | 2008-09
Examples A
2503
2583
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13Copyright © Mapscape B.V. | J.H. Van Moll | 2008-09
Examples B
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14Copyright © Mapscape B.V. | J.H. Van Moll | 2008-09
Towards a Quantitative Quality Model
In-lab data
verification
Field testing
POI comparisonsIdentify
dimensions of
quality
Identify quality
requirements & acceptance
criteria
Quality profile
Refine
Internal use
for map validation
services
User experienceAutomotive
requirements
Position as an
industry reference
Identify and develop
test technology
Test methods
Novelty: the application of ‘quality modeling’ to the domain of data, instead of physical products
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15Copyright © Mapscape B.V. | J.H. Van Moll | 2008-09
Profile measurement (example)
General database
Basic rules
Destination input
Route planning
Positioning Display
RDS TMC
TPD
ADAS
0
0,5
1
0,4
0,85
0,79
0,26
1 1
1
1
1
Normalized
Basic rules
General db
ADAS
TPD
RDS/TMC
DisplayPositioning
Routeplanning
Destination
input
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16Copyright © Mapscape B.V. | J.H. Van Moll | 2008-09
Our Experiences
• Verifying the data in map databases is a specific area of verification, different from other types of data typically encountered in databases (e.g. financial, administrative, logistical environments)
• Enormous growth of data volumes (e.g. new geographic regions) necessitates an effective and efficient verification process/approach
• No industry consensus on map quality (objective quality reference needed)
• Quality Model is perceived as strong marketing/company profiling instrument
• Model is used for process improvement projects at customers (data suppliers)
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17Copyright © Mapscape B.V. | J.H. Van Moll | 2008-09
QUESTIONS ?
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• Contact information:
• Mapscape B.V.• Henri Wijnmalenweg 5b • 5657 EP Eindhoven• The Netherlands • Phone +31 (0)40 8444852 • www.mapscape.eu
•18
• Contact information:
• J.H. van Moll ([email protected])• Mapscape B.V.• Henri Wijnmalenweg 5b • 5657 EP Eindhoven• The Netherlands • Phone +31 (0)40 7113500 • www.mapscape.eu
•18•Copyright © Mapscape | J.H. Van Moll | 2008-08