Simon Thum FraunhoferInstitut für Graphische Datenverarbeitung IGD Fraunhoferstraße 5 64283 Darmstadt Tel 49 6151 155 581 simonthumigdfraunhoferde wwwigdfraunhoferde ID: 928763
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Slide1
Reducing Maintenance Complexity of User-centric Web Portrayal Services
Simon ThumFraunhofer-Institut für Graphische Datenverarbeitung IGDFraunhoferstraße 564283 DarmstadtTel +49 6151 155 – 581simon.thum@igd.fraunhofer.de www.igd.fraunhofer.de
An
alternate
approach
to
web-
based
3D
Geodata
Portrayal
Authors
: Simon Thum
and
Michel Krämer
Slide2Simon Thum: Reducing Maintenance Complexity ...
MotivationOur ApproachWhere it fits inWhy it‘s differentSpecific constraints
Our SolutionCharacteristics
Outlook
Comparison
Application
opportunities
Slide3MOTIVATION
Simon Thum: Reducing Maintenance Complexity ...
Slide4MOTIVATION
Simon Thum: Reducing Maintenance Complexity ...
Slide5Portrayal complexity
Simon Thum: Reducing Maintenance Complexity ...
Slide6Better
matches specific user demandsLess knowledge in the clientIncreased ability to adapt to acquisition
idiosyncrasesHeterogenous, non-othogonal
source
data
Does
not
depend
on
spatial
or
semantic
partitioning (overlap)Less/no need for preprocessingAlways up-to-date
More a-priori knowledge in the portrayal serviceLess client-side controlRun-time OverheadRequires known datasource-wide identifiers
User-
centric
portrayal
Slide7Data flow
Simon Thum: Reducing Maintenance Complexity ...
Data
Specialist
End-User
Source
Select
Display Element G.
Render & Display
Slide8A Scenario is
the central unit in our approachMap to actual use casesMore technically: Coinciding portrayal
requirementsDefined
as
a
set
of
portrayal
rules
and
their
parametersConstrain the anticipated portrayal problems we might need to solveEnable
the IR approachScenariosSimon Thum: Reducing Maintenance Complexity ...
Slide9Decomposition
Simon Thum: Reducing Maintenance Complexity ...Portrayal ScenarioRequirements
Information Items
Information Item
Representations
Slide10Intermediate Representation
Explosion of interdependencies
Slide11Intermediate Representation
The IR is canonical information required to solve portrayal problems
Slide12Data heterogenity or
„Fitness for Portrayal“Simon Thum: Reducing Maintenance Complexity ...Correlate sumCategory
Sufficiency
Solution
0
implicit
insufficient
ambient
knowledge
[0..1[
partially
sufficient
Inference
(
perhaps incuding ambient knowledge)1explicit
completely
sufficient
n/a
>
1
partially
sufficient
arbitration
From
information
item
representations
to
an IR item
Slide13Knowledge
about data sources is shifted closer to themClient needs less knowledgeScalable way to express
and solve portrayal
problems
Achieved
by
separating
the
concern
of
heterogenityLess reliance on preprocessingThe approach has been tested at the
local levelbut should scale nicelyDoesn‘t fit well with client-driven approaches SummarySimon Thum: Reducing Maintenance Complexity ...
Slide14Thanks for
your attention!May I answer questions?Simon ThumFraunhofer-Institut für Graphische Datenverarbeitung IGD
Fraunhoferstraße 564283 DarmstadtTel
+
49 6151 155 –
581
simon.thum@igd.fraunhofer.de
www.igd.fraunhofer.de