semantical 3d city modeling

7/30/2019 Semantical 3D City Modeling

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Semantical 3D city modeling - Implications in

smart city design, development and maintenance.

Guduru Raghunath Babu

Vice President

Geospatial Technologies

Surbana International Consultants Pte Ltd

Singapore


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Basic understanding

Business need

Integration models

Looking forward


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The development of semantic 3D city models has

brought in rapid changes in urban management such

as emergency and catastrophe planning, checking

building developments, and utility networks.


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Geospatial semantic Analytics ( GSA)

Semantic 3D models of form encode the geometry

as well as the identity of key components of a facility,

Ex: Building floors, walls, ceiling, stairs, accesses

etc.


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Volume of data for analytics

Complex and non standard data models

Tough to design and implement


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Data collection

Raster data

Legacy data

Urban planningdata

Architecturaldata

Engineering data

Mobile scanning

Inbuildingscanning

Sensor data


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Outside and inside building

scanning results in a large

datasets.

It is needed to have a

inherent automated data

tagging modeling to manage

and use the data


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It is rapid and cost effective way to develop usable 3d

data.

For ex: Building paths ways, emergency exit and

evacuation schemes.


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Classification of building will help to access the

Semantic library information quicker.

External business analytics data integration will help

to evaluate alternate methods quickly.

Ex: total number of people in building and floor wisedistribution.


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A simplified building model based cityGML

specifications.


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Spatial data elements as big as building blocs to as

small as window shall have to developed as genericobjects.

Element design and implementation is a multi

domain and also have strong regulatory aspects.

Ex: For a sustainable building, all the design and

construct items shall have to reviewed by the

Building control Authority of the city.


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Existing Data

GIS centers

Agencies

Survey

Survey Dept

Site Survey

GIS

Urban Planning

Infrastructure

Architecture

Landscape

Engineering

Project Monitoring/IT System

GIS

Businessdata

BIM


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Most of the valuable information and analysis is

lost in the transition..Urban design

&

Architecture

Detailed

EngineeringConstruction Maintenance

Endangered species ( elements) are

Sustainable zoning guidelines

Community themes

Socioeconomic design and fabric plan.


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CityGML plays a key role in making GIS & BIM to work together.

Initiative of OGC to give a semantic city model ( since 2005) isthe first step to integrate 3D GIS models into upstream activities.

BIM follows IFC standards which will also handle schedule, cost

estimates, along with walls, roofs, floors, doors and other objects

of building inventory.


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3D modeling for spatial data is multi faceted and incremental.

Handover and hand holding with next player should be done

with a greater care and understanding.

Geometric data+ Semantic models+ Business Analytics = based for

Sustainable smart city design, development and maintenance.

semantical 3d city modeling

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