Multisource 3D Model

Supervisors:
Shashish Maharjan
Ganesh Dhakal

Final Presentation on:

Multisource Data
Integration To Prepare
Interactive 3D Model Of
Kathmandu University

Dated on: Friday, July 12, 2013

Group Members:
Biplov Bhandari (04)
Archana KC (09)
Upendra Oli (19)
Niroj Panta (20)
Uttam Pudasaini (22)

2

Wednesday, November 06,
2013

Presentation Outline
 Introduction








Rationale
Objectives
Resources Used
Methodology
Outcomes
Work schedule
Conclusion and Recommendation

Multisource Data Integration to Prepare The Interactive 3D Model of Kathmandu University

3

2013

Description Of The Project Title
Multisource Data Integration to Prepare a Interactive 3D Model of Kathmandu
University
 Spatial data acquired from different heterogeneous sources are being input
into a common data base

 The use of different data sources
brings along many challenges.


For example, multiple data
formats, various accuracies,
coordinate systems and level of
details must be taken into
consideration


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2013

Multisource Data Integration to Prepare a Interactive 3D Model of



A digital representation of
features, either real or
hypothetical, in threedimensional space



3D models represent a 3D
object using a collection of
points in 3D space, connected
by various geometric entities
such as triangles, lines, curved
surfaces, etc


5

2013



A 3-Dimensional representation of landscape
and inanimate feature of Kathmandu
University
Overlay of Photorealistic features made using
Google Sketch UP over the 3D terrain made
using Arc GIS(Arc map and Arc Scene)
complete the model

How were we able to synchronize the
various file formats??

Projection System details:
Projected Coordinate System:
MUTM Central 87, False
Easting= 500000, False
Northing=0, Scale
Factor=0.9999,Linear Unit
=meter
Geographic Coordinate
System : GCS Everest
Bangladesh, Prime Meridian:
Greenwich, Angular
Unit=Degree


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2013

Some Common 3D File Formats

COLLABORATIVE DESIGN ACTIVITY
 An open-standard XML format for
storing 3D models.

ABC – Alembic (Computer Graphics)



BLEND – Blender(.blend)
CTM – OpenCTM(.ctm)
DAE – COLLADA (.dae)
MRC – voxels in cryo-electron
microscopy

Often used as an interchange format
for 3D applications.

 Also format for 3D textured objects
stored inside KML.
 File extension: .dae (digital asset
exchange)

 Exporting multipatch features to
COLLADA allows sharing of complex
U3D – Universal 3D file format (.u3d)
analysis results with others and also
provides a mechanism for updating
VRML97 - VRML Virtual reality modeling
textured 3D GIS data, such as buildings,
language (.wrl)
using third-party software like
SketchUp

7

2013

Computerized maps that allow users to interface
with various aspects of the maps themselves.
Offers following major options to the map user
 Zooming in or out on a specified location,


Panning easily between geographic areas

 planning driving routes and Geocoding
 Providing street/satellite views of a desired
locale.

 Permitting professionals the ability to interact,
update, and make changes to the maps in real
time.

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2013

Introduction

 Rationale








Objectives
Resources Used
Methodology
Outcomes
Work schedule
References

9

2013

Rationale: Why This Project
Kathmandu University being the leading institution of Nepal doesn’t have any
means to disseminate the University map portals among its visitors, students
and other stake holders

The two dimensional master plan without any spatial reference is still serving as
the tool to visualize the spatial position of the University components

So a necessity of three dimensional map was felt which could serve as a tool to
visualize all the features along with the terrain in digital form with the web
access.


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2013

Introduction
Rationale

 Objectives







Resources Used
Methodology
Outcomes
Work schedule
References

11

2013

Objectives Of The Study
The main objective of the study is to prepare the 3D virtual model of the
Kathmandu University showing the photo realistic buildings, roads, boundary,
and other living as well as the inanimate features.
The main objectives are followed by following sub objectives:

•To integrate the spatial data obtained from the heterogeneous sources.
To prepare a Geo database of Kathmandu University
•To prepare the interactive map where users can request different aspects of
map viewing.
•To upload the interactive map on the web portal for multi user access as a
means of map dissemination.

12

2013

Introduction
Rationale
Objectives

 Limitations






Methodology
Outcomes
Work schedule
References

13

2013

Limitations Of The Study
This study has been undertaken in the view of meeting the partial fulfillment of the
Engineering Project, GEOM 307. The study had to be completed within the limited
time frame and resource limitations.

1.Resource limitation:

The limited budget constrained for the quality data, high precision
instruments i.e. Satellite Images and good working environment
i.e. High speed internet, (For downloading the textures, Images and Google
Earth Integration)

High computer processors (For simultaneous use of various software )


14

2013

Introduction
Rationale
Objectives
Limitations

 Methodology





Outcomes
Work schedule
References

15

2013

Software used
Sketch Up-For creating 3d inanimate features like buildings, pole, playground
etc.
Google Earth- Georeferenced Google images are good source for positional
data of features like trees, vegetation etc.
Arc Map V.10.0 Cad to Geodatabase conversion and preparation of all 2d
map layers
Arc Scene V.10.0 Preparation of 3D terrain and integration of the models
prepared in Sketch Up to produce a model.
AutoCAD Civil 3D Land Desktop Companion 2009 Editing and extractions of
annotation data from AutoCAD drawing of the university


2013

16

Work Flow Diagram
Google Earth Image Of University Area
3D Model Of
KU

3D MODEL OF
TERRAIN

KU Land Survey July
2010

Multipurpose Cadastral Data,
Banepa Office

3D MODEL OF FEATURES

IMPORT SKETCHUP
MODELS TO ARC
SCENE

AutoCAD plan of
buildings and
other features

3d Models(buildings+
roads+ other Man
Made Features)

CAD Models
To Sketchup
MODELS TO
SKETCH UP

Creation Of 3d
Features In
Skecth Up


17

3D Model Of
KU

2013

Adding Interactive Options
(Interactive Map)

Upload To Web


2013

18

Data Integration Procedure
AutoCAD plan (CED 2010)
 Cad to Geodatabase conversion
 Differentiating individual layers of whole features

AutoCAD master plan of KU

Geodatabase in Arc Map


19

2013

Multipurpose Cadastral Survey-digital Cadastral Office, Banepa
 Accurate positioning of building footprints and roads


20

2013

Google earth images
 Images were georeferenced and used for creating features like trees,
vegetation


21

2013

Sketch Up Modelling
A open source software provided by Google and is mainly used for 3D
modeling and sharing.
Mainly used for 3d city modeling in the Google Earth
We used this software to develop our 3D models of the KU buildings.
Tools we used


22

2013

Photorealistic Building Models


23

6/21/2013

Buildings constructed using Auto CAD plans

MULTISOURCE DATA INTEGRATION TO PREPARE
INTERACTIVE 3-D MODEL OF KATHMANDU
UNIVERSITY

24

2013


25

2013

Buildings made without using cad plan


26

2013


27

2013


28

2013

3D Terrain Modeling Using GIS Package: ArcGIS V10.0
2D Editing

3D Editing

Arc map

Arc Scene

 One of the 3 main component that
make up ArcGIS.

 A software to visualize features
in 3D by providing height
information from feature
geometry, feature attributes,
layer properties, or a defined
3D surface (such as a digital
elevation model, or DEM)

 An interface that allows users to
view data sets together,
perform analysis and create maps
 All 2d mapping works were performed
in Arc map Version 10
 Arc map version 10 provides an easy
interface for mapping functionality

 Arc Scene version 10.0 have
got advance 3d editing tools


29

2013

2D EDITING AND MAPPING-ARC MAP
Cad to Geodatabase
Reads a CAD dataset and creates feature classes of the drawing. The feature classes are
written to a Geodatabase feature dataset.


30

2013

Final 2D map with all information


31

2013

TIN representation of the terrain

 TINs are a form of vector-based digital geographic data and are
constructed by triangulating a set of vertices (points).



The vertices are connected with a series of edges to form a
network of triangles following Delaunay triangulation


32

2013


33

2013

INTERACTIVE TIN EDIITNG
 The resulting triangulation satisfies the Delaunay triangle criterion


which ensures that no vertex lies within the interior of any of the
circumcircles of the triangles in the network.

 If the Delaunay criterion is satisfied everywhere on the TIN, the
minimum interior angle of all triangles is maximized.
 The result is that long, thin triangles are avoided as much as possible.


34

2013

3d Editing - Arc Scene
 Arc Scene allows 3D editing environment and offers more edit tool
options specific to multipatches
 Editing in 3D is designed to work with the 3D Analyst extension in
ArcScene



3D editor tools are easily available from a dock able toolbar and a pulldown 3D Editor menu

 All tools provide real-time surface feedback, which permits you to save
your edits directly back the document or undo your changes.


35

2013


36

2013

Multipatch feature

 A GIS object that stores a collection of patches to represent the boundary of
a 3D object as a single row in a database
 Contain 3D models with vertical and overhanging faces allowing the
creation of photorealistic 3D views.
 Can contain texture information, such as a digital photograph of the front of
a building.
 Is stored in the Geodatabase or shapefiles in the same manner as point,
line, and polygon data.


37

Fig: Multipatch representation of
Kathmandu University central library.

2013

Fig: Multipatch representation of
Admin Block


38

2013

Georeferencing 3D
 Locating the building exactly where it
has to be.
 Models are georeferenced with the
help of move tool.


39

2013

Integration Of ArcScene and SketchUp


40

2013

Interactive Web Mapping
 Using Google API V3.
 Strong JavaScript Library.

 Coding is relatively easy to use and understand.
Why Google API v3?
Core objects: Map, Markers, Info Windows.

Custom Overlays, Controls, Tiles.
Geocoding.
Ground Overlays.
KML/KMZ Layers.


41

2013

Introduction
Rationale
Objectives
Limitations
Methodology

 Outcomes
 Work schedule
 Conclusion and Recommendation
 References

42

2013

The major outcomes of the project are:
Geo Database of Kathmandu University


43

2013

Animated Map 3D : A video Clip

2D Animated Web Map:


44

2013


45

2013

Introduction
Rationale
Objectives
Limitations
Methodology
Outcomes

 Work schedule
 References


S.N

Weeks
Activities

1

2

3

4

5

6

46

1

3D model of terrain with features

9

Mid term presentation

10

Preparation of interactive web model

11

Final report preparation

12

14

15

2013

Data integration and 3D building
models preparation

8

13

Data collection

7

12

Proposal defense

6

11

Interaction with Supervisor

5

10

Project title decision

4

9

Desk study and web browsing

3

8

Project title discussion

2.

7

Final presentation

47

2013


48

2013

Introduction
Rationale
Objectives
Limitations
Methodology
Outcomes
 Work schedule

 References

49

2013

 Multisource data integration is often a complex task and involves the series
of coordinate transformation and file formats interpolability issues.
 The users of today’s era wants map to be more interactive and user
friendly.
 Accurate 3D modeling of the any geographical location first seeks the
quality data with completeness and correctness and also the excellent
working environment .
 Establishment of the web server is the effective means of disseminating
the maps among the variety of users .


50

2013

Introduction
Rationale
Objectives
Limitations
Methodology
Outcomes
 Work schedule
 Conclusion and Recommendation

 References

51

2013

http://blogs.esri.com/esri/arcgis/2012/01/05/making-a-large-scale-3d-map-part1/

Ross, L., Kleinschmit, B., Döllner, J. and Buchholz, H., 2006. Automated
Transformation of 2D Vector-Based Plans to 3D Geovirtual Environments, In
Buhmann, E.; Ervin, S.; Jorgeson,I. & Strobl, J. (ed.) Trends in Knowledge-Based
Landscape Modeling - Proceedings at Anhalt University of Applied Sciences.,
Heidelberg (Wichmann), 2006, 138-144.
Collaborative Mapping of London Using Google Maps: The LondonProfile
Maurizio Gibin, Alex Singleton, Richard Milton, Pablo Mateos, and Paul Longley.
All authors are associated with the Centre for Advanced Spatial Analysis (CASA) at
UCL.
Early Development in Vancouver: Report of the Community Asset Mapping
Project (CAMP) by Clyde Hertzman, Sidney A. McLean, Dafna E. Kohen, Jim Dunn,
Terry EvansAugust 2002

52

2013

Web mapping - Wikipedia, the free encyclopedia
Talk:Web mapping - Wikipedia, the free encyclopedia.
Static Maps API V2 Developer Guide
This document details the Static Maps API v2. To update your v1 URLs, please consult
the Upgrade Guide.
Google Maps Image APIs
Google Maps Javascript API V3 Events
Note: The Google Maps Javascript API Version 3 documented within these pages is
now the official Javascript API.
Google Maps JavaScript API V3.
Mohammadi M. and Rajabifard, A. 2010. Development of an interoperable tool to
facilitate spatial data integration in the context of SDI, International Journal of
Geographical Information Science, Vol 20, No 7, International Journal of GIS, 727-741.
Mohammadi, H., A. Rajabifard, A. Binns, and I. P. Williamson. 2006. Development of a
framework and associated tools for the integration of multisource spatial datasets.
17th UNRCC – AP (September 18 – 22). Bangkok, Thailand.

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